Behavioral intervention for urinary incontinence in women: evidence for practice

Now Anyone Can Kegel: One-Time Office Teaching of Pelvic Floor Muscle Exercises

OBJECTIVE

In women with pelvic floor disorders, we sought to determine time-to-teach (TTT) correct pelvic floor muscle (PFM) contraction, prevalence of inappropriate muscle contractions, and the association between TTT with PFM strength (PFMS).

METHODS

From August 2017 to April 2018, patients from 2 pelvic floor disorder clinics participated in a prospective study examining PFMS. Assessment of PFMS was performed to obtain TTT, inappropriate accessory muscle, and Modified Oxford Grading Scale scores for pelvic floor muscle contractions 1 to pelvic floor muscle contractions 2.

RESULTS

Of 100 women, 77 were from low-resource setting and 23 from high-resource setting. Mean TTT overall was 64.1 seconds (±26.0; range, 9-160 seconds), and mean TTT between settings was not significant. Mean overall TTT was significantly less than 90 seconds. Seventy-one women (71%) demonstrated at least 1 inappropriate accessory muscle, and of those, up to 50% of patients contracting 2 accessory muscle groups with abdominal muscles most frequently contracted at baseline. Thirty-nine percent of patients had a PFM contraction of at least 3 at baseline compared with 82% of patients upon completion of teaching, with 60% of women with scores of 4 or 5. The mean difference overall between baseline and pelvic floor muscle contractions 3 was 1.27 (confidence interval, 1.08-1.46; P < 0.001), and this increase was significant.

CONCLUSIONS

One-time PFMS teaching can be done in a time-proficient fashion and is translatable across high-resource and low-resource settings. Most patients show improvement in PFMS immediately and can quickly acquire this learned skill for proper home practice.

Effect of belly dancing on urinary incontinence-related muscles and vaginal pressure in middle-aged women

[Purpose] This study examined the effect of belly dancing on the urinary incontinence-related muscles and vaginal pressure in middle-aged women to provide fundamental data for establishing an effective training program focusing on mitigating and preventing urinary incontinence. [Subjects and Methods] The subjects included 24 middle-aged women, who have been diagnosed with urinary incontinence. The subjects were randomly divided into two groups, viz. the experimental group (N=12) and control group (N=12). The experimental group underwent a belly dancing program focusing on pelvis moves. [Results] In the experimental group, the urinary incontinence-related muscle strength and vaginal pressure were increased, while the control group showed no significant change. [Conclusion] Belly dancing focusing on pelvis moves had a positive effect on the urinary incontinence-related muscle strength and vaginal pressure, suggesting that a recreational dance program focusing on pelvic exercise can be used to prevent and relieve the symptoms of urinary incontinence as a non-surgical treatment.

Effect of pelvic floor muscle exercises on pulmonary function

[Purpose] This study aimed to determine the correlation between pelvic floor muscle strength and pulmonary function. In particular, we examined whether pelvic floor muscle exercises can improve pulmonary function. [Subjects] Thirty female college students aged 19–21 with no history of nervous or musculoskeletal system injury were randomly divided into experimental and control groups. [Methods] For the pulmonary function test, spirometry items included forced vital capacity and maximal voluntary ventilation. Pelvic floor muscle exercises consisted of Kegel exercises performed three times daily for 4 weeks. [Results] Kegel exercises performed in the experimental group significantly improved forced vital capacity, forced expiratory volume in 1 second, PER, FEF 25–75%, IC, and maximum voluntary ventilation compared to no improvement in the control group. [Conclusion] Kegel exercises significantly improved pulmonary function. When abdominal pressure increased, pelvic floor muscles performed contraction at the same time. Therefore, we recommend that the use of pelvic floor muscle exercises be considered for improving pulmonary function.

[Effect of Kegel exercise to prevent urinary and fecal incontinence in antenatal and postnatal women: systematic review]

PURPOSE

The aim of this study was to review the literature to determine whether intensive pelvic floor muscle training during pregnancy and after delivery could prevent urinary and fecal incontinence.

METHODS

Randomized controlled trials (RCT) of low-risk obstetric populations who had done Kegel exercise during pregnancy and after delivery met the inclusion criteria. Articles published between 1966 and 2012 from periodicals indexed in Ovid Medline, Embase, Scopus, KoreaMed, NDSL and other databases were selected, using the following keywords: 'Kegel, pelvic floor exercise'. The Cochrane's Risk of Bias was applied to assess the internal validity of the RCT. Fourteen selected studies were analyzed by meta-analysis using RevMan 5.1.

RESULTS

Fourteen RCTs with high methodological quality, involving 6,454 women were included. They indicated that Kegel exercise significantly reduced the development of urinary and fecal incontinence from pregnancy to postpartum. Also, there was low clinical heterogeneity.

CONCLUSION

There is some evidence that for antenatal and postnatal women, Kegel exercise can prevent urinary and fecal incontinence. Therefore, a priority task is to develop standardized Kegel exercise programs for Korean pregnant and postpartum women and make efficient use of these programs.

Effectiveness of a pelvic floor muscle exercise program on urinary incontinence following childbirth

EXECUTIVE SUMMARY: Objectives  The primary objective of this review was to determine, from the available evidence, the effectiveness of an antenatal and/or a post-natal program of pelvic floor muscle exercises (PFME) compared with usual care on preventing, reducing or resolving the incidence and severity of stress incontinence, urge incontinence or mixed stress and urge urinary incontinence following childbirth. Secondary objectives were included to examine the effectiveness of a PFME program on pelvic floor muscle strength and on encouraging adherence to an exercising program.

INCLUSION CRITERIA

TYPES OF STUDIES: Randomised controlled trials and non-randomised controlled trials were included in the review if, in relation to urinary incontinence, and/or adherence to a PFME program, and/or pelvic floor muscle strength, the following had been explored: • antenatal PFME compared with usual care; • post-natal PFME compared with usual care; • a PFME program compared with usual care. Usual care is commonly used to describe the care women normally receive from health professionals in the antenatal and/or post-natal period. In some cases usual care includes a standard information package given to all women attending the health service and in others it is advice about performing PFME.

TYPES OF PARTICIPANTS

Participants included women who experienced a spontaneous onset of labour and who subsequently delivered at more than 20 weeks gestation either vaginally, both spontaneous and assisted, or by non-elective caesarean section.

EXCLUSIONS

• women who delivered by elective caesarean section; • women experiencing post-partum overflow urinary incontinence.

TYPES OF INTERVENTIONS

1 Pelvic floor muscle exercises. 2 PFME instruction and a PFME program's components, such as educational materials, feedback (including biofeedback, e.g. information about strength of pelvic floor muscle contractions by various means) and number of PFME.

EXCLUSIONS

• electrical stimulation of pelvic floor muscles; • vaginal cones; or • other adjunct therapies. In studies that included a subgroup treated with one of these interventions, the results of the subgroup were excluded from the review's analysis.

TYPES OF OUTCOME MEASURES

Outcomes that were of interest: • non-occurrence of urinary incontinence following childbirth; • a change in the frequency, duration or severity (as appropriate) of urinary incontinence up to 12 months following childbirth. • a change in the strength of pelvic floor muscle contractions; • period of time PFME continued after initial instruction; • frequency of PFME undertaken; • women's awareness of the importance of PFME; • satisfaction with PFME instruction. Search strategy  All major electronic sources of information relevant to the topic (e.g. PubMed, CINAHL and the Cochrane Library) were searched to identify published and unpublished studies and previous work in the field. Printed journals were hand-searched and reference lists checked for potentially useful research. The review included any studies undertaken between 1981 and 2003. The search did not attempt to locate unpublished research before 1991. Assessment of quality  An independent Review Panel carried out quality assessment of studies. Two members of the panel, using quality assessment checklists developed for the review, reviewed each study. Disagreements between reviewers were resolved through discussion or a third reviewer examining a study. Data extraction and analysis  A data extraction tool was developed to extract data relating to participant characteristics, study methods, interventions and outcomes. Two reviewers independently extracted the required data. Randomised controlled trials included in the review were pooled in several meta-analyses using RevMan software program. Heterogeneity between studies was determined to ensure that they were sufficiently similar to allow for the pooling of their results. Non-randomised controlled trials were discussed in narrative comparisons. Results  Six randomised controlled trials met the inclusion criteria for the primary objective of the systematic review. The results of this review indicate that antenatal PFME and post-natal PFME are effective in resolving or reducing urinary incontinence following childbirth. There was insufficient evidence to conclude that PFME can prevent urinary incontinence in post-partum women. In most of these studies women were selected randomly and therefore included women without urinary incontinence and women with urinary incontinence. Two randomised controlled trials selected their sample on the criteria of existing post-partum urinary incontinence. A subgroup analysis of these studies showed that post-natal PFME also have a significant effect on reducing or resolving urinary incontinence in women with existing post-partum urinary incontinence. Seven randomised controlled trials and three non-randomised controlled trials met the inclusion criteria for the secondary objectives of the review. Findings of the studies included in the review suggest a PFME program will improve the frequency with which women perform PFME. Two studies found that women receiving the intervention (a PFME program) and who were performing PFME regularly in the month before data collection were significantly less likely to have any incontinence. The review's results support previous findings showing there is little evidence that a high-intensity PFME program is more effective than a low-intensity PFME regimen of exercising. No conclusions about the effectiveness of feedback to a woman about pelvic floor muscle strength, for example, perineometer measures, as part of a PFME program can be reached. The mixed results of this review mean that no conclusions can be reached about the effectiveness of a PFME program, antenatal or post-natal, on improving pelvic floor muscle strength. A number of studies reported a high percentage of women lost to follow-up and the data collected in most of the studies relied on self-reports relating to urinary incontinence and/or frequency of exercising. These factors may have affected the overall results of the review. However, wherever possible, tests for heterogeneity were carried out to determine if studies should be combined in meta-analyses and in other cases the results' limitations are acknowledged. Implications for practice  In terms of the effectiveness of PFME programs, the results of this review indicate that urinary incontinence following childbirth can be improved by performing PFME and that any form of a specific PFME program appears to improve exercising frequency. However, the value of individual components of PFME programs, such as take-home materials, reminder telephone calls and feedback of exercising effectiveness, is less clear. • Encourage women to undertake both antenatal and post-natal PFME (E1). • Pay particular attention to women with antenatal and post-natal urinary incontinence in providing advice and PFME instruction (E1). • To encourage adherence and continuation, PFME education programs should be multifaceted with a number of components, rather than only supplying an information booklet (E4). • Include PFME as a specific program in all antenatal and post-natal care, incorporating at least two individual instruction sessions into the program (E1). • Provide post-partum contact, particularly for those discharged early, either by telephone, electronic or home visits (E4). • Design pelvic floor muscle home exercise programs that are realistic given the demands on a mother and that can be incorporated into her daily routine in terms of number and frequency. Two or more training sessions per week are recommended (E4). • Health professionals working with women in the post-partum period should ask about symptoms of incontinence to ensure assistance is offered to those experiencing urinary incontinence (E4).

Comparison of different treatment protocols in the treatment of idiopathic detrusor overactivity: a randomized controlled trial

Objective: To investigate and compare the effectiveness of various treatment protocols for the treatment of women with idiopathic detrusor overactivity.

Design: Prospective, randomized controlled trial.

Setting: Departments of Physiotherapy and Rehabilitation and Obstetrics and Gynaecology, Hacettepe University.

Subjects: Forty-six subjects were randomized to three groups.

Interventions: The first group received only pharmacotherapy, the second group received only physiotherapy and in the third group pharmacotherapy was combined with physiotherapy (combined therapy group).

Main measures: All patients were evaluated at the beginning and at the end of treatment. Assessment parameters were maximum cystometric capacity, electromyographic activity of pelvic floor muscles, voiding diary parameters, the amount of urine leakage and the quality of life score.

Results: The maximum cystometric capacity and the electromyographic activity of pelvic floor muscles increased significantly and the number of voids/day and incontinence episodes/day, and the amount of urine leakage reduced significantly ( P < 0.05) in both physiotherapy and combined therapy groups while there was no significant difference in the pharmacotherapy group. After treatment, the number of voids/day increased by 0.3 ± 3.4 in the pharmacotherapy group ( P > 0.05) and decreased by 5.1 ± 5.5 and 4.7 ± 5.6 in the physiotherapy and combined therapy groups, respectively ( P < 0.05). Statistically significant improvements were observed in all groups according to the number of voids/night and the quality of life scores at the end of the treatment.

Conclusion: The physiotherapy protocol we introduced in the present study with or without anticholinergic therapy has a substantial positive impact on the treatment of female patients with idiopathic detrusor overactivity.

Goal achievement as a patient-generated outcome measure for stress urinary incontinence

OBJECTIVES

To explore women's goals and goal attainment for the conservative and surgical treatment of stress urinary incontinence (SUI), and to examine the feasibility of Goal Attainment Scaling (GAS) as an outcome measure in this population.

BACKGROUND

Despite the range of treatments for SUI, little is known about the outcomes patients consider important. Current instruments measure the impact of SUI on the ability to live a 'normal' life without addressing what normal looks like for the patient. Patient-generated measures that address what a patient aims to achieve may fill this gap.

DESIGN

A mixed-methods exploratory design combined semi-structured interviews with validated questionnaires and individualized rating of goal achievement. SETTING AND PARTICIPANTS PARTICIPANTS: with SUI (n = 18) were interviewed in their homes prior to initiation of treatment and 3-6 months afterwards.

MAIN VARIABLES

Participants reported individualized goals pre-treatment and rated goal attainment after surgical and conservative therapy. Quality of life impact and change were measured using short forms of the Incontinence Impact Questionnaire and Urinary Distress Inventory.

RESULTS

Women expressed a median of four highly individualized treatment-related goals but goal achievement following conservative treatment was poor. GAS was not feasible as an outcome measure; women readily identified personal goals but could not independently identify graded levels of attainment for each goal.

CONCLUSIONS

Although further work is needed to examine the most feasible, valid, and reliable method of measuring goal achievement in research, asking patients with UI to identify pre-treatment goals may provide useful information to guide treatment-related decision making.

Differences in morphology and contractility of the bulbospongiosus and pubococcygeus muscles in nulliparous and multiparous rabbits

In women, birth trauma can result in altered anatomy of supporting structures of the pelvic floor and in the development of urinary incontinence. The goal of this study was to investigate the association between parturition and the morphology and function of perineal and pelvic muscles in the female rabbit. In ten nulliparous and ten multiparous same-age females, we investigated morphological, histological (n = 5 females/group), and contractile characteristics (n = 5 females/group) of the perineal bulbospongiosus (Bsm) and the pelvic pubococcygeus (Pcm) muscles. Bsm and Pcm muscles of multiparous females were significantly lighter, they had a smaller cross-sectional fiber area, and developed significantly lower twitch and tetanic tension force in response to electrical stimulation than muscles of nulliparous females. In female rabbits, multiparity is associated with potentially pathological changes in the morphological and functional characteristics of these perineal and pelvic muscles, possibly as a result of stretching during parturition.

Pelvic floor fitness using lay instructors

OBJECTIVE

Typically, pelvic muscle training for women with pelvic floor disorders is provided by medical personnel. We sought to evaluate the feasibility and symptom improvement after a nonmedical pelvic muscle training class in a prospective cohort.

METHODS

Study participants volunteered to participate in an 11-week pelvic fitness and education class taught by a lay instructor at five fitness classrooms in the Chicago area. Participation was limited to adult women who verbally indicated that their pelvic symptoms included a minimum of some urge urinary symptom. Standardized assessments were completed before class, at the end of class, and 1 year after completion of the classes. These assessments included the 12-item short-form, validated pelvic questionnaires (Urogenital Distress Inventory Short Form, Incontinence Impact Questionnaire Short Form, and Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire), and self-reported goals selection and achievement.

RESULTS

Eighty-seven of 102 participants provided before and after class data, and 76 also provided 1-year data. Participants had a mean age of 58 years and a mean body mass index of 26.3. Most (91%) were white, and 63% had at least completed college. After class improvements in Urogenital Distress Inventory Short Form bothersomeness ratings were noted for all items and maintained at 1 year for all but pain or discomfort. Significant quality-of-life and sexual function improvements were reported after class and at 1 year. The 12-item short-form responses documented improvements in six areas of general health. The most important self-selected goal was achieved in 71% after class and maintained by 67% at 1 year.

CONCLUSION

Nonmedical pelvic fitness classes are promising for pelvic symptom improvement in self-selected participants.

LEVEL OF EVIDENCE

II.

Urinary urge incontinence: causes and management strategies

Bladder control is a skill most people learn in childhood, so if control is lost in adult life the impact can be very significant, particularly on the quality of life of the person affected. There are many causes of loss of bladder control, ranging from neurological conditions to menopause, as well as certain medications. This article discusses urinary urgency and urge incontinence, examines its causes and diagnosis, and provides an overview of the nursing interventions available to treat the problem.

Effectiveness of a pelvic floor muscle exercise program on urinary incontinence following childbirth

OBJECTIVES

The primary objective of this review was to determine, from the available evidence, the effectiveness of an antenatal and/or a post-natal program of pelvic floor muscle exercises (PFME) compared with usual care on preventing, reducing or resolving the incidence and severity of stress incontinence, urge incontinence or mixed stress and urge urinary incontinence following childbirth. Secondary objectives were included to examine the effectiveness of a PFME program on pelvic floor muscle strength and on encouraging adherence to an exercising program.

INCLUSION CRITERIA

Randomised controlled trials and non-randomised controlled trials were included in the review if, in relation to urinary incontinence, and/or adherence to a PFME program, and/or pelvic floor muscle strength, the following had been explored:Usual care is commonly used to describe the care women normally receive from health professionals in the antenatal and/or post-natal period. In some cases usual care includes a standard information package given to all women attending the health service and in others it is advice about performing PFME.Participants included women who experienced a spontaneous onset of labour and who subsequently delivered at more than 20 weeks gestation either vaginally, both spontaneous and assisted, or by non-elective caesarean section.

EXCLUSIONS

1 Pelvic floor muscle exercises.2 PFME instruction and a PFME program's components, such as educational materials, feedback (including biofeedback, e.g. information about strength of pelvic floor muscle contractions by various means) and number of PFME.

EXCLUSIONS

In studies that included a subgroup treated with one of these interventions, the results of the subgroup were excluded from the review's analysis.Outcomes that were of interest: SEARCH STRATEGY: All major electronic sources of information relevant to the topic (e.g. PubMed, CINAHL and the Cochrane Library) were searched to identify published and unpublished studies and previous work in the field. Printed journals were hand-searched and reference lists checked for potentially useful research. The review included any studies undertaken between 1981 and 2003. The search did not attempt to locate unpublished research before 1991.

ASSESSMENT OF QUALITY

An independent Review Panel carried out quality assessment of studies. Two members of the panel, using quality assessment checklists developed for the review, reviewed each study. Disagreements between reviewers were resolved through discussion or a third reviewer examining a study.

DATA EXTRACTION AND ANALYSIS

A data extraction tool was developed to extract data relating to participant characteristics, study methods, interventions and outcomes. Two reviewers independently extracted the required data.Randomised controlled trials included in the review were pooled in several meta-analyses using RevMan software program. Heterogeneity between studies was determined to ensure that they were sufficiently similar to allow for the pooling of their results. Non-randomised controlled trials were discussed in narrative comparisons.

RESULTS

Six randomised controlled trials met the inclusion criteria for the primary objective of the systematic review. The results of this review indicate that antenatal PFME and post-natal PFME are effective in resolving or reducing urinary incontinence following childbirth. There was insufficient evidence to conclude that PFME can prevent urinary incontinence in post-partum women. In most of these studies women were selected randomly and therefore included women without urinary incontinence and women with urinary incontinence. Two randomised controlled trials selected their sample on the criteria of existing post-partum urinary incontinence. A subgroup analysis of these studies showed that post-natal PFME also have a significant effect on reducing or resolving urinary incontinence in women with existing post-partum urinary incontinence.Seven randomised controlled trials and three non-randomised controlled trials met the inclusion criteria for the secondary objectives of the review. Findings of the studies included in the review suggest a PFME program will improve the frequency with which women perform PFME. Two studies found that women receiving the intervention (a PFME program) and who were performing PFME regularly in the month before data collection were significantly less likely to have any incontinence. The review's results support previous findings showing there is little evidence that a high-intensity PFME program is more effective than a low-intensity PFME regimen of exercising. No conclusions about the effectiveness of feedback to a woman about pelvic floor muscle strength, for example, perineometer measures, as part of a PFME program can be reached.The mixed results of this review mean that no conclusions can be reached about the effectiveness of a PFME program, antenatal or post-natal, on improving pelvic floor muscle strength.A number of studies reported a high percentage of women lost to follow-up and the data collected in most of the studies relied on self-reports relating to urinary incontinence and/or frequency of exercising. These factors may have affected the overall results of the review. However, wherever possible, tests for heterogeneity were carried out to determine if studies should be combined in meta-analyses and in other cases the results' limitations are acknowledged.

IMPLICATIONS FOR PRACTICE

In terms of the effectiveness of PFME programs, the results of this review indicate that urinary incontinence following childbirth can be improved by performing PFME and that any form of a specific PFME program appears to improve exercising frequency. However, the value of individual components of PFME programs, such as take-home materials, reminder telephone calls and feedback of exercising effectiveness, is less clear.

Outcome Evaluation of a Multi-Disciplinary Community-Based Continence Service for Australian Women

This longitudinal study evaluated the effectiveness of a multi-disciplinary community-based service offering conservative treatment for Australian women suffering urinary incontinence and living independently in the community, in terms of urinary incontinence symptom severity, impact on quality of life and knowledge outcomes. One hundred and twenty-three women attending The Waterworx Centre, a multi-disciplinary, publicly funded community-based continence service in South East Queensland Australia participated in the study. They received multi-disciplinary conservative treatment for urinary incontinence, including comprehensive assessment and an individually-tailored plan of care. All the women were also linked back to their own generalist health professional for ongoing care and management. Data were collected over a one-year period: at first consultation, and at three months and six months following the first consultation. The International Continence Society Urinary Symptom Index Short Form-Female Outcome was used to measure urinary symptoms and impact on quality of life, and a researcher-developed test was used to measure changes in knowledge. Results showed that the women experienced an improvement in urinary symptoms and continence-related knowledge at three months following first consultation, and a decreased impact on quality of life, with these improvements either being sustained or increasing at six months. This study demonstrated that multi-disciplinary community-based services offering specialist conservative treatment for women suffering urinary incontinence can be effective in achieving improvements in urinary symptoms and continence-related knowledge and reducing the impact of urinary incontinence on quality of life.

Urinary incontinence in working women: a comparison study

OBJECTIVES

To compare the findings of two surveys concerning the nature of urinary incontinence and management strategies used by full-time employed working women.

METHODS

The first study was conducted in an urban academic setting with a survey distributed to 2000 women. The second study was conducted with 500 women in a rural pottery manufacturing facility.

RESULTS

Twenty-one percent of the women working in an academic setting (group A) and 29% (p = 0.002) of the women working in a manufacturing setting (group B) reported being incontinent of urine at least monthly. More women in group B reported antecedents mixed incontinence (i.e., antecedent to both stress and urge incontinence). More women in group B also used panty liners to manage urine loss (p = 0.003), whereas more women in group A used voiding schedules (p = 0.008) and pelvic muscle exercises (p = 0.04). More women in group A reported that they did not know if their incontinence could improve (40% vs. 1%, p = 0.00). The majority in both groups said that getting treatment was of no or little importance, yet, overwhelmingly, most women (group A 81%; group B 86%) wanted more information about incontinence.

CONCLUSIONS

Incontinence is a prevalent condition in working women. Discrepancies exist in the nature of the urine loss and strategies used to manage incontinence. Treatment also differs for those women who report urine loss to healthcare providers. Most women want to learn more about incontinence. Secondary prevention strategies need to be tailored and tested to meet symptoms and concerns for women in different work settings.

Anatomical and physiological characteristics of perineal muscles in the female rabbit

Little information is available on the participation of the perineal striated muscles in female reproductive processes. Here, we describe the gross anatomy and innervation of two striated perineal muscles in the female rabbit, the bulbospongiosus (BSM) and ischiocavernosus (ISM), and analyze their reflex electromyographic (EMG) activity in response to stimulation of the perigenital skin and vaginal tract. Twenty-four mature chinchilla-breed rabbit does were used: 12 to describe the anatomy and innervation of the muscles, 9 to determine reflex EMG activity of the muscles in response to stimulation of the perigenital skin and specific levels of the vaginal tract and 3 to analyze the effect of contraction of the muscles on intravaginal pressure. Both muscles were well developed, with their fibers originating at the ischiadic arch and inserting onto the ligamentum suspensorium clitoridis. Branches of the clitoral and perineal nerves innervated the BSM and ISM, respectively. Bilateral electrical stimulation of these nerves provoked retraction of the clitoral sheath and an increase in intravaginal pressure at the level of the perineal vagina. Whereas neither muscle responded to stimulation of the perigenital skin, both were reflexively activated during mechanical stimulation of the inner walls of the perineal vagina. Prolonged cervical stimulation inhibited this reflex. Thus, in reproductive processes such as copulation and/or parturition, the contraction of these muscles may be induced during stimulation of the perineal vagina.