Predictors of Sexual Intercourse Frequency Among Couples Trying to Conceive

Higher female partner age and longer duration of marriage: key factors for less frequent sexual intercourse in infertile couples

Background Sexual intercourse frequency (SIF) is widely known to be associated with fertility, but little is known about what predicts SIF among infertile couples trying to conceive. In this study, we examine the demographic and lifestyle risk factors associated with less frequent coitus among infertile couples. Methods This cross-sectional study examined infertile couples actively trying to conceive, selecting them from patients seeking fertility treatment. Demographic data and lifestyle factors such as age, occupation, smoking status, and body mass index were recorded. Participants self-reported the frequency of vaginal-penile intercourse per week and month. Descriptive statistics and binary logistic regression analyses were used to analyze the data and identify predictors of SIF. Results Our study included a final sample size of 790 couples. In univariate binary logistic regression, women's age (OR: 0.948; 95% CI 0.928-0.969), men's age (OR: 0.957; 95% CI 0.937-0.977), duration of marriage (OR: 0.927; 95% CI 0.903-0.952), and duration of infertility (OR: 0.928; 95% CI 0.898-0.960) were found to be significant factors. Additionally, men's smoking was negatively associated with SIF, with an odds ratio of 0.732 (95% CI: 0.578-0.928, P =0.010). Conclusions We observed that younger female partner age and shorter duration of marriage independently emerged as significant predictors associated with higher SIF. Our study highlights the need for tailored counseling and education based on age and marital stage. Older couples may benefit from specialized support such as sexual therapy and stress management. The negative impact of men's smoking on sexual intercourse frequency underscores the importance of effective smoking cessation programs. Comprehensive infertility treatment should address medical, psychological, and sexual health factors.

The prevalence of infertility and factors associated with infertility in Ethiopia: Analysis of Ethiopian Demographic and Health Survey (EDHS)

BACKGROUND

Despite having a high fertility rate, low-resource countries are also home to couples with infertility problems. Although many couples are suffering from the psychological impacts of infertility, its level and determinants are not adequately known. The main objective of this study is to assess the prevalence and factors associated with infertility among couples in Ethiopia using the 2016 Ethiopian Demographic and Health Survey (EDHS) data.

METHOD

The study employed a cross-sectional study design extracting variables from the 2016 EDHS. The study included all married or cohabitating women aged 15 to 49 years in the Couples Recode (CR) file data set. Weighted samples of 6141 respondents were analyzed. We used Stata 14 software for analyzing the data. The association of selected independent variables with primary, secondary, and total infertility was analyzed using a logistic regression model. We presented the results using an adjusted odds ratio (AOR) with a 95% confidence interval (CI) and a p-value <0.05 as a cut-off point for declaring statistical significance.

RESULTS

The prevalence of infertility in the past 12 months was 24.2% (95% CI: 23.1-25.3%), of which the majority (90.7%) was secondary infertility. Greater than 35 years of age (AOR = 2.45, 95% CI (1.58-3.79)), rural residence (AOR = 1.06, 95% CI (1.01-1.39)), smoking (AOR = 2.29, 95% CI (1.39-3.77)), and <18.5 Body Mass Index (BMI) (AOR = 1.71, 95% CI (1.43-2.04)) were significantly associated with infertility. Conversely, infertility was less likely among women with formal education and better wealth index. Primary infertility was significantly higher among women whose partners drink alcohol (AOR = 1.55; 95% CI 1.06-2.28)) and chew khat (AOR = 1.62; 95% CI (1.12-2.36)). Secondary infertility was significantly higher among women with <18.5 BMI (AOR = 1.59, 95% CI (1.37-1.84)), >30 BMI (AOR = 1.54; 95% CI 1.01-2.35)), and <15 years of age at first birth (AOR = 1.40; 95% CI 1.15-1.69)).

CONCLUSION

More than one in five couples in Ethiopia has an infertility problem. Both male and female-related factors are associated with infertility. Primary infertility was significantly higher among women whose partner chews khat and drinks alcohol. Secondary infertility was significantly associated with being underweight, obese, smoking, and young age at first birth. Hence, taking action on preventable factors is the most critical treatment approach and will improve the health status of the couples in other ways.

Sexual dysfunction and disorders as a consequence of infertility: a systematic review and meta-analysis

BACKGROUND

Sexuality has a key impact on quality of life and on reproductive health. Infertility often results in sexual dysfunction. Despite this close association, addressing sexuality is not a standard component of infertility counselling, especially since in most countries sexual medicine is not a core element of specialist training. Even today, many doctors and patients consider discussing sexuality to be more challenging than other aspects of reproductive medicine. The present review addresses the complex consequences of infertility on sexuality.

OBJECTIVE AND RATIONALE

Our goals were: (i) to identify the prevalence of sexual problems resulting from infertility, (ii) to evaluate characteristics of sexual difficulties and disorders resulting from infertility and (iii) to analyse factors involved in the complex association between sexual problems and infertility.

SEARCH METHODS

A systematic search for publications containing keywords related to sexual disorders and infertility was performed via PubMed, Web of Science and Psyndex. A total of 170 manuscripts published between January 1966 and April 2021 were identified after verification of inclusion and exclusion criteria. The reference lists in these manuscripts were searched for further relevant literature. Studies were reviewed for quality-related methodological details.

OUTCOMES

Couples diagnosed with infertility have an increased risk of sexual disorders. Loss of sexual desire and erectile dysfunction are among the most frequent sexual disorders resulting from infertility. Currently available literature reflects only fragmentarily the complexity of the diverse interactions. Sexuality plays out against the backdrop of interactions among personal, cultural, infertility-related and sexuality-related factors. Considering this complexity, it is crucial to evaluate individual profiles as well as partnership interactions to avoid a negative impact of infertility on a couple's sexual life.

WIDER IMPLICATIONS

Identifying sexual disorders as relevant considerations in the context of infertility and exploring their impact during the entire course of diagnosis and treatment constitute an important contribution to comprehensively care for the couples concerned. Counselling should focus on preventing the onset and aggravation of sexual disorders. As sexuality represents a major component of quality of life and of partnership, such support may improve not only the current overall wellbeing but also the chances of a satisfactory long-term partnership and family life.

Concordance of self-reported sexual intercourse frequency between members of mixed-sex couples attempting conception

Studies about sexual health require accurate information on sexual behaviors, yet there is no gold standard for assessing sexual behavior. Concordance of partner reports is one way to estimate the reliability and, indirectly, the validity of such data. We aimed to evaluate the inter-partner concordance of self-reported intercourse frequency among mixed-sex couples attempting conception. We analyzed data from Pregnancy Study Online (PRESTO), a North American prospective preconception cohort study. During 2013-2021, self-reported intercourse frequency at baseline was ascertained using the same question for both partners: "In the past month, about how often did you have sexual intercourse with your partner?" with categorical response options. We used unweighted and linear-weight weighted kappas to assess inter-partner concordance of reported intercourse frequency and log-binomial regression to estimate unadjusted and adjusted prevalence ratios (PR) and 95% confidence intervals (CI) for predictors of discordance. Among 3,015 couples, 1,927 (63.9%) reported exactly concordant categories of intercourse frequency, while the female partner reported more frequent intercourse in 715 (23.7%) couples and the male partner reported more frequent intercourse in 373 (12.4%) couples. Unweighted and weighted kappas were 0.50 (95% CI 0.48, 0.53) and 0.63 (95% CI 0.61, 0.65), respectively. Predictors of discordance included marital status (unmarried versus married: PR=1.61 [95% CI 1.11, 2.29] for the male partner reporting more frequent intercourse) and longer relationship length (5-9 years PR=1.14 [95% CI 0.96, 1.34], ≥10 years PR=1.14 [95% CI 0.92, 1.42], respectively, compared with <5 years) for the female partner reporting more frequent intercourse.

The intergenerational transmission of sexual frequency

Intergenerational relationships are one of the most frequently studied topics in the social sciences. Within the area of family, researchers find intergenerational similarity in family behaviors such as marriage, divorce, and fertility. Yet less research has examined the intergenerational aspects of a key proximate determinant of fertility: sexual frequency. We use the National Survey of Families and Households to examine the relationship between sexual frequency of parents and the sexual frequency of children when adults. We link parental sexual frequency in 1987/1988, when children were ages 5-18, to the sexual frequency of the children in 2001-2003 when these grown children were ages 18-34. We find a modest, yet significant association, between parental and adult children sexual frequency. A mechanism behind this association appears to be the higher likelihood of being in a union among children of parents with high sexual frequency.

Metabolic, Oxidative and Psychological Stress as Mediators of the Effect of COVID-19 on Male Infertility: A Literature Review

Over 300 million patients with coronavirus disease 2019 (COVID-19) have been reported worldwide since the outbreak of the pandemic in Wuhan, Hubei Province, China. COVID-19 is induced by the acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The effect of SARS-CoV-2 infection on the male reproductive system is unclear. The aim of this review is to assess the effect of SARS-CoV-2 infection on male fertility and the impact of possible mediators, such as metabolic, oxidative and psychological stress. SARS-CoV-2 infection aggravates metabolic stress and directly or indirectly affects male fertility by reducing seminal health. In addition, SARS-CoV-2 infection leads to excessive production of reactive oxygen species (ROS) and increased psychological distress. These data suggest that SARS-CoV-2 infection reduces male fertility, possibly by means of metabolic, oxidative and psychological stress. Therefore, among other consequences, the possibility of COVID-19-induced male infertility should not be neglected.

The Impact of COVID-19 Pandemic on Female Sexual Function

Introduction: The outbreak of the COVID-19 pandemic affected many aspects of life involving sexual functioning. Methods: This prospective, noninterventional, observational research was performed from July 2020 to August 2020, involving a total of 644 patients. Female sexual function index (FSFI) scores of those women were compared in relation to results of our research from April 2020. Questionnaires were collected concerning socio-demographic characteristics of patients as well as the impact of the COVID-19 pandemic on their lives. Results: Every domain significantly decreased in the first month of the lockdown. Before the pandemic, the total FSFI was reported at 30.1 ± 4.4, while in the first month of the pandemic it was at 25.8 ± 9.7 (p < 0.001). The lowest FSFI score was reported by women who lived in average conditions. There was a statistically significant increase in the overall FSFI score in the fifth month of the pandemic (27.5 ± 6.8) when compared to the FSFI score in the first month of the pandemic (25.8 ± 9.7). The scores in arousal, lubrication, orgasm and pain were reported as higher (respectively p < 0.001, p < 0.001, p < 0.001, p < 0.05), while desire was reported lower (p < 0.001). The satisfaction score remained almost the same (p < 0.05). Conclusions: Our study indicates a significant decrease in FSFI scores across all domains. There are still many questions whether the statue from the vaccinated person or convalescents affects the sense of security and, thus, increases sexual satisfaction.

Premature Ejaculation, True or False? Clinical evaluation of PE patients with multiple intercourse in one day

Clinical characteristics of 216 adult males previously diagnosed with premature ejaculation (PE) were studied. Using a survey questionnaire, characteristics included intravaginal ejaculation latency time (IELT), penile hardness scores and the refractory period (RP). Ninety-four PE patients reported they had experienced vaginal intercourse more than once (2 to 4 times) in one day (~44%). IELT was significantly increased at the second and subsequent intercourses, and IIEF-15 (International Index of Erectile Function-15) and relevant subclass scores were markedly improved compared to their first intercourse and also compared to the single intercourse group in this cohort study. Overall sexual satisfaction was achieved in the PE patients with multiple intercourse experiences. The same trend was observed in both the patients diagnosed with lifelong and acquired PE. Based on the evidence, the argument is that the PE patients who were diagnosed using their performance at the first intercourse but who have the ability to participate in multiple vaginal intercourses in one day are unlikely to be true PE. The false PE may account for over 40% of PE patients diagnosed by current guidelines and definitions.

Influence Factors of Sexual Intercourse Frequency in Infertile Couples without Sexual Dysfunction in Southwest China: A Retrospective Study

INTRODUCTION

The aim of this study was to investigate the sexual intercourse frequency (SIF) of infertile couples without sexual dysfunction and analyze its related influencing factors.

MATERIALS AND METHODS

We retrospectively analyzed the data of a total number of 4,923 infertile couples without sexual dysfunction who received treatment in our assisted reproductive center from October 2016 to October 2018. Both partners of couples were inquired about their information of demographic statistics, occupations, lifestyles, education backgrounds, psychological characteristics, and testostrone levels of male patients. The multivariable linear regression analysis was applied to evaluate the influence of various variables on SIF.

RESULTS

The median (interquartile range) SIF of infertile couples without sexual dysfunction was 7 (6.5-8) times per month. Lower academic qualification and younger age were predictive of increased SIF in both partners. The SIF of Chinese Han women and Chinese Zang women is higher than that of other ethnic groups. Men with lower testosterone (<10 nmol/L) were associated with lower SIF. The BMI, occupation, alcohol consumption, races of both partners of couples, and smoking status of males were not associated with SIF. Multivariable linear regression analysis indicated that only the age and the education level of men played an important role in SIF, and educational level of men had the greatest impact, followed by men's age.

CONCLUSION

In our study, we analyzed demographics data, occupational characteristics, and lifestyle behaviors of both partners, as well as men's testosterone levels; we also reported the related SIF. According to our research, men's education level was the most important factor in predicting SIF, followed by men's age. Testosterone levels of men do not appear to play a substantial role in predicting SIF in infertile couples.

Adjustment toward infertility mediates the relationship between coping, depression and anxiety in men: A confirmatory analysis

OBJECTIVE

The aim of the present study was to develop a theoretical framework for the relationships between coping, adjustment toward infertility, depression and anxiety and to present a confirmatory analysis of the developed theoretical framework in men who, together with their spouses, were candidates for assisted reproductive technology (ART) treatment.

STUDY DESIGN

This cross-sectional study was conducted on 212 men selected from the couples who were candidate for ART. Depression and anxiety, adjustment toward infertility, and coping strategies were assessed using self-report questionnaire. Statistical analysis was performed using the plug-in application PROCESS macro and AMOS software.

RESULTS

The results showed that higher depression and anxiety scores were related to lower adjustment to infertility. Higher adjustment score was associated with lower self-blame, self-focused rumination, active confronting and avoidance coping strategies scores significantly. In the depression and anxiety pathway models, the positive relationship between active confronting and elf-focused rumination coping strategies were mediated by adjustment. However, the effect of active confronting on depression and anxiety was significant only with mediating role of adjustment. The direct and indirect relationship of self-focused rumination and the indirect relationship of active confronting with depression and anxiety had a good fitness (CMIN/ DF = .419).

CONCLUSION

The self-focused rumination and active confronting coping strategies, having negative association with adjustment to infertility, and may increase depression and anxiety in men undergoing ART; however, higher adjustment is associated with decreased depression and anxiety. Therefore, mental health programs for men undergoing ART may need to focus on improving the skills of adaptive coping strategies.

Limitations to intergenerational inheritance: subchronic paternal stress preconception does not influence offspring anxiety

Independent studies have observed that a paternal history of stress or trauma is associated with his children having a greater likelihood of developing psychopathologies such as anxiety disorders. This father-to-child effect is reproduced in several mouse models of stress, which have been crucial in developing a greater understanding of intergenerational epigenetic inheritance. We previously reported that treatment of C57Bl/6J male breeders with low-dose corticosterone (CORT) for 28 days prior to mating yielded increased anxiety-related behaviours in their male F1 offspring. The present study aimed to determine whether subchronic 7-day CORT treatment of male mice just prior to mating would be sufficient to induce intergenerational modifications of anxiety-related behaviours in offspring. We report that subchronic CORT treatment of male breeders reduced their week-on-week body weight gain and altered NR3C1 and CRH gene expression in the hypothalamus. There were no effects on sperm count and glucocorticoid receptor protein levels within the epididymal tissue of male breeders. Regarding the F1 offspring, screening for anxiety-related behaviours using the elevated-plus maze, light–dark box, and novelty-suppressed feeding test revealed no differences between the offspring of CORT-treated breeders compared to controls. Thus, it is crucial that future studies take into consideration the duration of exposure when assessing the intergenerational impacts of paternal health.

Psychosocial and professional burden of Medically Assisted Reproduction (MAR): Results from a French survey

OBJECTIVE

To evaluate the impact of infertility and Medically Assisted Reproduction (MAR) throughout all aspects of life among infertile women and men.

MATERIALS AND METHODS

An online survey included 1 045 French patients (355 men, 690 women) who were living or had lived the experience of infertility and MAR. The questionnaire included 56 questions on several domains: global feelings, treatment burden, rapport with medical staff, psychosocial impact, sexual life and professional consequences.

RESULTS

Respondents had experienced an average of 3.6 (95% CI: 3.3-3.9) MAR cycles: 5% (n = 46) were pregnant, 4% (n = 47) were waiting to start MAR, 50% (n = 522) succeeded in having a live birth following MAR, 19% (n = 199) were currently undergoing ART, and 21% (n = 221) dropped out of the MAR process without a live birth. Satisfaction rates regarding the received medical care were above 80%, but 42% of patients pointed out the lack of information about non-medical support. An important impact on sexual life was reported, with 21% of patients admitted having not had intercourse for several weeks or even several months. Concerning the impact on professional life, 63% of active workers currently in an MAR program (n = 185) considered that MAR had strong repercussions on the organization of their working life with 49% of them reporting a negative impact on the quality of their work, and 46% of them reporting the necessity to lie about missing work during their treatment.

CONCLUSION

Despite a high overall level of satisfaction regarding medical care, the burden of infertility and MAR on quality of life is strong, especially on sexuality and professional organization. Clinical staff should be encouraged to develop non-medical support for all patients at any stage of infertility treatment. Enterprises should be warned about the professional impact of infertility and MAR to help their employees reconcile personal and professional life.

Coital Frequency and the Probability of Pregnancy in Couples Trying to Conceive Their First Child: A Prospective Cohort Study in Japan

Background: Low fertility persists but remains unexplained in Japan. We examined whether the probability of pregnancy was influenced by coital frequency, age, reproductive age (assessed by antimüllerian hormone, AMH), and BMI. Methods: We established a two-year prospective study with a sample of hormonally monitored Japanese women aged 23-34 years wanting to conceive their first child. For a maximum of 24 weeks participants recorded menstrual bleeding, sexual intercourse, ovulation, and pregnancy. Additional information on pregnancy and infertility treatment was collected one and two years after intake. Results: The natural conception rate and coital frequency were both low in this sample. Among 80 participants, 44% (35) naturally conceived in 24 weeks. After two years, 74% (59) of women had delivered or were currently pregnant, 50% (40) due to natural and 24% (19) due to assisted conception, and 5% (4) were lost to follow-up. By two years, 56% (45) of women had sought fertility treatment. In 18% (58/319) of the observed ovarian cycles across 24 weeks there was no intercourse in a fertile period. Higher coital frequency at intake was associated with increased probability of conception by 24 weeks of follow-up (OR 1.23, 95%CI 1.02, 1.47). Chronological age, reproductive age, and BMI were not associated with the probability of pregnancy at 24 weeks. Conclusions: Our results suggest that first, natural conception rates could potentially increase with more frequent and well timed intercourse, and second that further work is needed to understand why even in a motivated sample of women monitoring their fertile periods, both the conception and coitus rates were low.

Sexual Activity of Patients Undergoing Testicular Sperm Extraction

Introduction

For couples who wish for a baby, sexual activity (through intercourse) is the only way to conceive naturally. However, the sexual activity of men undergoing testicular sperm extraction (TESE) and factors that influence it among affected couples are not clearly understood.

Aim

To examine sexual activity among infertile men undergoing TESE and to identify factors that influenced it.

Methods

Married Japanese male patients undergoing TESE were included. Sexual activity during the previous month was surveyed using a questionnaire, and potential predictive factors influencing sexual activity were examined.

Main Outcome Measures

Two hundred twenty-six married men who answered a questionnaire regarding sexual frequency were reviewed retrospectively.

Results

The patient mean age was 35.8 ± 7.5 years (range 23–67) and the mean age of their partners was 32.9 ± 4.5 years (range 23–44). Most couples (n = 193) were in their first marriage, and 33 were remarried. The mean marriage duration was 52.6 ± 42.2 months (range 1–192). Microdissection TESE and conventional TESE were performed for 152 and 74 patients, respectively. Overall, the mean sexual activity during the last month was 3.6 ± 2.6 times (range 0–15). Marriage duration was negatively correlated with the frequency of sexual activity (r = −0.23; P < .01). There were no correlations between sexual activity and patient age, partner age, marriage type (first marriage or remarried), testicular volume, or serum total testosterone concentration. Regression analysis showed that marriage duration (odds ratio = 1.01; 95% CI, 1.003–1.019; P = .009) and testicular volume (odds ratio = 0.94; 95% CI, 0.88–0.99; P = .033) were significant predictors of low sexual activity (0–1 times/month).

Conclusion

The sexual activity of patients undergoing TESE was almost the same as reported previously. Patient age, partner age, testicular volume, and serum total testosterone concentration had no correlation with the reported frequency of sexual activity.

Taniguchi H, Matsuda T, Nakaoka Y, et al. Sexual Activity of Patients Undergoing Testicular Sperm Extraction. Sex Med 2019;8:30–35.

Towards a more pragmatic and wiser approach to infertility care

Infertility represents a very peculiar area of medicine. Contrary to other areas, where signs and symptoms lead to a diagnosis, which in turn leads to a specific treatment, in reproduction the lack of signs and symptoms for more than 12 months suggests the diagnosis of ‘unexplained subfertility’, and if this condition has lasted for some years, couples qualify for IVF. Diagnosis and treatments can extend over long periods of time (even years) and the accuracy of the diagnostic armamentarium is not optimal. Uncertainty about diagnosis and the need for significant perseverance is demanding on both couples and physicians, and actually constitute a very favourable situation for overdiagnosis (‘unexplained subfertility’) and overtreatment (IVF) on one hand, and, on the other, it may also affect compliance with treatments. To improve our capacity to properly handle this challenging situation, increased attention should be given to the duration of pregnancy seeking. Initiating treatments earlier in older women is unwise because this population has a lower fecundity and, therefore, duration of pregnancy seeking is even more important to achieve a reliable diagnosis of infertility. Moreover, if the infertility work-up is unremarkable, duration of pregnancy seeking should be extended up to more than 2 years prior to making a diagnosis of unexplained infertility regardless of age. An adequate period of pregnancy seeking is also required for couples who are diagnosed with conditions that can interfere with fertility to avoid overdiagnosis and overtreatment. Indeed, most causes of infertility will reduce but not impair natural conception. Within this sometimes long-term management, physicians should also pay attention to detrimental life habits in order to optimize the chances of both natural and assisted reproduction technology -mediated pregnancy. Even if interventional studies are not conclusive, it is advisable to address the problems of obesity and smoking. Focussing on frequency of sexual intercourse may be also beneficial for natural conception. Finally, there is the need for improving our capacity to handle compliance. Providing information on the importance of persevering at the start of treatment, promoting shared decision-making and tackling patient, clinic and treatment causes of drop-out can all improve the overall chances of parenthood. Thus, we plead for a wiser and more pragmatic approach to infertility, paying more attention to these neglected, but in our opinion essential, aspects of infertility care.

Changes in, and factors associated with, frequency of sex in Britain: evidence from three National Surveys of Sexual Attitudes and Lifestyles (Natsal)

OBJECTIVES

To examine changes over time in the reported frequency of occurrence of sex and associations between sexual frequency and selected variables.

DESIGN

Repeat, cross sectional, population based National Surveys of Sexual Attitudes and Lifestyles (Natsal-1, Natsal-2, and Natsal-3).

SETTING

British general population.

PARTICIPANTS

18 876 men and women aged 16-59 and resident in Britain were interviewed in Natsal-1, completed in 1991; 11 161 aged 16-44 years in Natsal-2, completed in 2001, and 15 162 aged 16-74 years in Natsal-3, completed in 2012. Comparisons of actual and preferred sexual frequency in men and women aged 16-44 (the age range common to all surveys) between the three surveys. Factors associated with sexual frequency of at least once a week were examined using Natsal-3 data.

MAIN OUTCOME MEASURES

Sexual activity in the past month; frequency of sex in the past month; preferred frequency of sex.

RESULTS

Median number of occasions of sex in the past month was four in Natsal-1 and Natsal-2 and three in Natsal-3 among women; and three in Natsal-1, Natsal-2, and Natsal-3 among men. The proportion reporting no sex in the past month fell between Natsal-1 and Natsal-2 (from 28.5% to 23.0% in women and from 30.9% to 26.0% in men) but increased significantly in Natsal-3 (to 29.3% in women and 29.2% in men). The proportion reporting sex 10 times or more in the past month increased between Natsal-1 and Natsal-2, from 18.4% to 20.6% in women and from 19.9% to 20.2% in men, but fell in Natsal-3, to 13.2% in woman and 14.4% in men. Participants aged 25 and over, and those married or cohabiting, experienced the steepest declines in sexual frequency (P values for interaction <0.05). Alongside the declines in sexual frequency, there was an increase in the proportion reporting that they would prefer sex more often. Age adjusted odds ratios showed that men and women in better physical and mental health had sex more frequently, as did those who were fully employed and those with higher earnings.

CONCLUSIONS

Frequency of sex has declined recently in Britain, more markedly among those in early middle age and those who are married or cohabiting. The findings and their implications need to be explained in the context of technological, demographic, and social change in Britain and warrant further investigation.