Impact of prepregnancy body mass index on pregnancy outcomes, incidence of urinary incontinence and quality of life during pregnancy - An observational cohort study

Effects of pre-pregnancy BMI and gestational weight gain on pregnancy and neonatal outcomes in Poland

Overweight and obesity are significant public health concerns, affecting pregnant women and potentially leading to numerous complications for both maternal and neonatal health. The aim of this study is to estimate how pre-pregnancy overweight and obesity, as well as gestational weight gain, influence pregnancy outcomes and neonatal health in Poland. The study material consisted of data from 2878 women aged 16-46 years from hospitals in Warsaw and Krosno. The analysis included data on the course of singleton pregnancies and the biological condition of the newborns, correlated with pre-pregnancy Body Mass Index (BMI) and gestational weight gain (GWG), which were compared to the standards set by the Institute of Medicine (IOM). Factor that significantly influences pre-pregnancy BMI and GWG is the number of pregnancies. For first-born women pre-pregnancy BMI was significantly lower than that of women giving birth for the second, third and subsequent times (ANOVA p < 0.0001), at the same time, the increase in weight in this group was the greatest (ANOVA p < 0.0001). The study found that pre-pregnancy BMI correlates more strongly with the occurrence of gestational diabetes than GWG above IOM recommendations (regression: p < 0.0001, R = 0.112 vs. p < 0.0001, R = 0.104). Analogous correlations were observed for the incidence of gestational hypertension and termination of pregnancy by caesarean section. Birth weight and length are significantly affected by both pre-pregnancy BMI and GWG but the effect of weight change is stronger (birth weight - pre-pregnancy BMI regression p < 0.0001, R = 0.116; GWG p < 0.0001, R = 0.248; birth length - pre-pregnancy BMI regression p < 0.0001, R = 0.087; GWG p < 0.0001, R = 0.180). An analogous relationship was observed for the presence of macrosomia. For APGAR scores, an inverse relationship was observed; while GWG did not show a significant relationship with the first minute score, perinatal neonatal status was significantly related to the mother's pre-pregnancy BMI (regression p = 0.0006). Similarly, pre-pregnancy maternal BMI > 25 significantly increased the odds of perinatal injury and breastfeeding difficulties.

Effects of gestational weight gain on adverse pregnancy outcomes among pregnant women in gurage zone, central Ethiopia: a cohort study

The consequences of being overweight in non-pregnant individuals have been studied and chronic diseases are found to be associated with higher weight gain. However, few studies target the effect of gestational weight gain on adverse pregnancy outcomes. Thus, this study aims to fill the knowledge gap due to the scarcity of studies and inconsistencies of results and gain more insight into the effects of gestational weight gain on pregnancy outcomes. A prospective cohort study was conducted among pregnant women who started antenatal care follow-up before the 16 weeks of gestation in the selected health facilities of the Gurage zone. The follow-up continued until the first 7 days after delivery to record all the pregnancy outcomes. Adverse pregnancy outcomes include any of the following conditions: gestational hypertension, pre-eclampsia, eclampsia, gestational diabetes mellitus, antepartum hemorrhage, post-partum hemorrhage, preterm delivery, low birth weight, low Apgar score, intra-uterine death, intrapartum death, and early neonatal death. Binary logistic regression was used to assess the relationship between adverse pregnancy outcomes and other independent variables. From the 424 pregnant women included in the study, adverse outcome was documented among 31.4%, [95% CI 26.9, 35.8]. Maternal age, educational status of the mother, body mass index, and gestational weight gain were significantly associated with adverse pregnancy outcomes. Adverse pregnancy outcomes were higher among mothers with young age, no formal education, higher body mass index, and larger gestational weight gain.

Association between Pre-pregnancy BMI and Pregnancy Outcomes in Women with Gestational Diabetes: A Retrospective Cohort Study

Background & Objective

The specific influence of the pre-pregnancy body mass index (PPBMI) on women with gestational diabetes mellitus (GDM) is unclear. Our objective was to investigate how PPBMI categories affect pregnancy and neonatal outcomes in women with GDM.

Methods

A retrospective cohort study was conducted using data from patients attending the Fujian Maternity and Child Health Hospital (Fuzhou, China) from 2021 to 2023. The participant records were stratified into four groups according to their BMI values: underweight, normal-weight, overweight, and obese. The pregnancy and neonatal outcomes for these BMI categories were analyzed using multivariable logistic regression.

Results

The study included data from 2,909 pregnant women diagnosed with GDM. Underweight women with GDM showed significantly lower risks of pregnancy-induced hypertension (PIH) (adjusted OR, 0.26) and cesarean sections (adjusted OR, 0.55) but higher risks of low body weight (LBW) infants (adjusted OR, 3.40). Overweight and obese women experienced higher risks of PIH (adjusted OR, 2.96), cesarean sections (adjusted OR, 1.62), and macrosomia (adjusted OR, 1.43).

Conclusion

PPBMIs significantly impact pregnancy outcomes in women with GDM. Both underweight and overweight/obese categories are associated with adverse outcomes, highlighting the need for pre-pregnancy counseling and interventions to achieve and maintain a healthy BMI.

Association of obesity and overweight with the risk of preeclampsia in pregnant women: an observational cohort study

BACKGROUND

According to the World Health Organization, obesity is considered a pervasive global epidemic with significant medical and social implications. In antenatal mothers, the prevalence varies from 40% in Western countries to 12% in India which leads to life-threatening complications-preeclampsia and eclampsia.

AIM

This study delves into the association between body mass index (BMI) and preeclampsia, among primi antenatal mothers with pregnancy-induced hypertension (PIH).

METHODS

An observational cohort (prospective) study was conducted among 150 primi antenatal mothers with pregnancy-induced hypertension in Government Headquarters Hospital, Tamil Nadu, India. Demographic data, body mass index, and pregnancy outcomes were assessed. Statistical analysis was performed using the SPSS 28.0 version.

RESULTS

Among 150 pregnant women, 63 (42%) were overweight, and 13 (8.7%) were obese. Higher BMI was significantly associated with maternal complications, especially preeclampsia (P < 0.001). Moreover, other complications such as abruptio placenta, pulmonary edema, eclampsia, and postpartum hemorrhage were not significantly associated with BMI.

CONCLUSION

The study calls attention to the persistent link between BMI and preeclampsia, emphasizing the need for comprehensive strategies aligned with the Sustainable Development Goal. Despite ongoing efforts, the study suggests a lack of substantial change in the prevalence of preeclampsia associated with increased BMI, prompting the exploration of innovative interventions to address weight-related factors during pregnancy for improved maternal and neonatal well-being.

Impact of maternal body mass index on pregnancy outcomes among Indian women

Maternal body mass index is a key factor that essentially regulates pregnancy outcome with respect to maternal and neonatal health. Maternal bodies, whether underweight or obese during pregnancy, can significantly increase the risk of adverse outcomes for both mothers and newborns. Therefore, it is of interest to evaluate the impact of maternal BMI on pregnancy outcomes and feto-maternal complications related to various BMI categories in a tertiary care setting. Hence, we recruited 250 pregnant women and divided them into five subgroups based on their BMI. We collected data on pregnancy complications, modes of delivery and maternal and neonatal outcomes. We performed tests of significance between categories of BMI and clinical outcomes. Percentage distribution by BMI: normal weight 49.2%, underweight 28.4%, overweight 15.6%, obese 6% and morbidly obese 0.8%. There was significant variability in higher BMI with incidences of caesarean section, pre-eclampsia, gestational diabetes, and NICU admissions. Anaemia rates were higher in underweight women, whereas pregnancy and childbirth-related complications like PPH and macrosomia were more pronounced in obese women. Severe extremes in BMI are associated with drastic adverse consequences, both for maternal and neonatal outcomes. Effective weight management is therefore key to achieving favourable pregnancy outcomes. Low BMI increases the risk of preterm birth and anaemia; high BMI raises the risk of gestational diabetes and hypertensive disorders. Key strategies include preconception counselling, tailored nutrition and physical activity.

Examining the quality of life among pregnant women diagnosed with gestational diabetes mellitus: A systematic review and meta-analysis for women's health promotion

Background

Quality of life (QoL) of women with gestational diabetes mellitus (GDM) is one of the fundamental issues and public health challenges. This study examines the QoL among pregnant women with GDM through a systematic review and meta-analysis.

Methods

A search was conducted in Scopus, PubMed, and the Web of Science databases for articles published until Jan 30, 2024. Manual searches of gray literature, Google Scholar, reference checks, and citation checks were conducted. The JBI's Critical Appraisal Checklist for Analytical Cross-Sectional Studies was utilized to assess the quality of the articles' reporting. The random model implemented in Stata software (version 16; Stata Corp.) was utilized to conduct the meta-analysis.

Results

Among the 516 studies obtained from the literature, only 15 were deemed suitable for inclusion. Most studies (73.3%) were conducted in nations with high-income levels. Additionally, general QoL was assessed in most studies (11 studies). The SF-36 and WHOQOLBREF questionnaires were the most often utilized. Based on the SF-36 measure, there was no statistically significant difference in the QoL of patients with GDM compared to the control group in most of dimensions. The WHOQOL-BREF instrument was utilized to estimate the QoL score at 49.69. The EQ-5D-5L tool revealed a difference in QoL scores between the GDM and control groups (MD=-7.40). The research findings were highly heterogeneous. The median evaluation score for the reporting quality of the articles was calculated to be 5, with a mean of 4.8 out of 7.

Conclusion

The results of the present study showed that GDM reduces the QoL of pregnant women, especially in terms of mental and social health. Therefore, interventions and support programs should be designed and implemented to improve these women's QoL.

Pregnant Women's Knowledge, Attitudes, and Associated Factors Toward Physical Exercise During Pregnancy in Al-Ahsa City, KSA

Introduction This research study aims to explore the understanding and perspective of pregnant women in Al-Ahsa regarding physical exercise during their pregnancy. Presently, there exists a deficiency in knowledge concerning the advantages of exercise for the well-being of both the expectant mother and the developing fetus within this area. The study endeavors to enlighten and empower pregnant women about the appropriate types and levels of exercise suitable for their individual physical activity during pregnancy, with the ultimate aim of attaining noteworthy health benefits. The proposed solution entails offering comprehensive education and guidance on the advantages and techniques of exercising during pregnancy. Methodology This is a cross-sectional study carried out in the city of Al-Al-Ahsa, located in Saudi Arabia. The data was collected through an online questionnaire. Subsequently, the collected data underwent a series of essential steps, including coding, thorough checking, and entry into an Excel spreadsheet. The final stage involved analyzing the data using the widely used statistical software SPSS. Results In this research conducted in Al-Ahsa City, the findings were based on a sample of 306 Saudi nationals. Several of the participants were aged over 45 (33.7%), married (81.4%), and had completed their college education (79.7%). In terms of their beliefs, the participants had an average score of 3.51 out of 7. Their level of awareness scored 5.13 out of 8, while their knowledge level scored 3.52 out of 5. A significant number of participants (68.3%) agreed on the importance of exercise during pregnancy, and a considerable percentage (72.9%) believed that any pregnant woman could exercise without seeking healthcare advice. When it came to accessing information about antenatal exercise, digital platforms, especially social media, were the primary source for the participants (63.4%). The most commonly practiced exercise type was walking (77.1%), and the main barriers reported were fatigue (64.4%) and time constraints (34.3%). Age was found to have a notable association with beliefs, awareness, and knowledge scores, while marital status and functional status showed marginal, insignificant associations. Conclusion This research underscores the significance of fostering optimistic beliefs, improving awareness, and addressing knowledge deficiencies through focused educational interventions. It emphasizes the crucial roles that healthcare professionals and digital platforms assume in spreading reliable information and assisting expectant mothers in making well-informed choices regarding their exercise routines. It is essential for future studies to investigate the efficacy of customized interventions and encompass diverse populations, thus deepening our comprehension of antenatal exercise behaviors and the factors that influence them.

Effect of low-glycemic index diet advice on pregnant outcomes in women with elevated risk of gestational diabetes mellitus: A meta-analysis of randomized controlled trails

BACKGROUND AND AIMS

The beneficial effect of low-glycemic index (GI) diet on gestational diabetes mellitus (GDM) has been suggested in many observational studies; however, results from intervention trials remain inconsistent. This study aims to estimate the effect of interventions with low-GI dietary advice on pregnant outcomes in women with elevated risk of GDM.

DESIGN

PubMed, Web of Science, Embase, and Cochrane Library databases were searched for randomized clinical trials (RCTs) through March 2022. Studies reporting the effect of low-GI diet advice intervention on maternal and fetal outcomes in pregnant women with increased risks of GDM were included. Random or fixed effects model was used to calculate combined treatment effects. Publication bias was assessed via Begg's and Egger's tests and funnel plot inspection.

RESULTS

Nine RCTs recruiting 3416 participants were included. Low-GI diet advice did not modulate the risk of GDM. Compared with control diets, low-GI diet advice significantly reduced gestational weight gain (GWG) (weighted mean differences, WMD = -0.93 kg, 95% CI: -1.31, -0.55; p < 0.001; n = 7) and the risk of premature birth (RR = 0.55, 95% CI: 0.35, 0.88; p = 0.012; n = 5). In subgroup analyses, the effect of low-GI diet interventions on premature birth was significant only in women with BMI higher than 30 kg/m2 (RR = 0.28, 95% CI: 0.10, 0.77, p = 0.014; n = 3); the significant effect on GWG was not altered by stratification of BMI and the type of GDM risk factors. No significant changes in other maternal and newborn outcomes were found.

CONCLUSIONS

Low-GI diet advice interventions during pregnancy decreased GWG and the risk of premature birth in women with elevated GDM risk; however, the interventions did not significantly prevent GDM development in these women.

Impact of Obesity and Hyperglycemia on Pregnancy-specific Urinary Incontinence

OBJECTIVE

 The lack of data on the impact of hyperglycemia and obesity on the prevalence of pregnancy-specific urinary incontinence (PSUI) led us to conduct a cross-sectional study on the prevalence and characteristics of PSUI using validated questionnaires and clinical data.

METHODS

 This cross-sectional study included 539 women with a gestational age of 34 weeks who visited a tertiary university hospital between 2015 and 2018. The main outcome measures were the prevalence of PSUI, the International Consultation on Incontinence Questionnaire Short Form (ICIQ-SF), and the Incontinence Severity Index (ISI) questionnaires. The women were classified into four groups: normoglycemic lean, normoglycemic obese, hyperglycemic lean, and hyperglycemic obese. The differences between groups were tested using descriptive statistics. Associations were estimated using logistic regression analysis and presented as unadjusted and adjusted odds ratios.

RESULTS

 Prevalence rates of PSUI were no different between groups. However, significant difference in hyperglycemic groups worse scores for severe and very severe PSUI. When adjusted data for confound factors was compared with normoglycemic lean group, the hyperglycemic obese group had significantly higher odds for severe and very severe forms of UI using ICIQ-SF (aOR 3.157; 95% CI 1.308 to 7.263) and ISI (aOR 20.324; 95% CI 2.265 to 182.329) questionnaires and highest perceived impact of PSUI (aOR 4.449; 95% CI 1.591 to 12.442).

CONCLUSION

 Our data indicate that obesity and hyperglycemia during pregnancy significantly increase the odds of severe forms and perceived impact of PSUI. Therefore, further effective preventive and curative treatments are greatly needed.

Women's Knowledge and Perceptions of the Effect of Exercise during Pregnancy: A Cross-Sectional Study

BACKGROUND

Many women may not be aware of the effect of exercise during pregnancy. The objective of this study was to explore the knowledge and perceptions of the effect of exercise and compare whether there was a difference between women who were pregnant at the time of the study, who were not pregnant but had given birth in the past, and those who had never been pregnant and had never given birth.

METHODS

A cohort of 291 women, aged 18-55 years, participated in this cross-sectional study. Ninety-one (31.3%) women were pregnant at the time of the study; 97 (33.3%) were not pregnant but had given birth in the past, and 103 (35.4%) were not pregnant and had never given birth. This was a survey by an on-line questionnaire.

RESULTS

Only 24.4 % of respondents were aware of the effect of exercise in pregnancy, 44% were not aware of the effect of exercise in pregnancy, and 52.6% did not know if exercise interventions could be prescribed during pregnancy. The perceived aims of exercise, reported by the women, were to keep the body fit (58%), to reduce low back and pelvic pain (55%), and to facilitate childbirth (51%).

CONCLUSIONS

Women who were not pregnant but had given birth were significantly less aware of the effect of exercise than women who were pregnant at the time of the study or not pregnant and had never given birth. The internet was the most common source of information about exercise among all respondents. Almost all women in the study felt the need for more knowledge about the effect of exercise during pregnancy. Therefore, exercise specialists must inform and educate women about the benefits of exercise during pregnancy.

Perineal Massage during Pregnancy for the Prevention of Postpartum Urinary Incontinence: Controlled Clinical Trial

Background and objectives: Urinary incontinence is any involuntary loss of urine. It may result in anxiety, depression, low self-esteem and social isolation. Perineal massage has spread as a prophylactic technique for treating complications during labor. Acknowledged effects of perineal massage are reduction of incidence and severity of perineal tear and use of equipment directly related to the intrapartum perineal trauma. The aim of this study was to determine the effectiveness of massage in urinary incontinence prevention and identification of possible differences in its form of application (self-massage or by a physiotherapist), with the previous assumption that it is effective and that there are differences between the different forms of application. Materials and Methods: A controlled clinical trial with a sample of 81 pregnant women was conducted. The participants were divided into three groups: a group that received the massage applied by a specialized physiotherapist, another group that applied the massage to themselves, and a control group that only received ordinary obstetric care. Results: No differences were identified in the incidence or severity of urinary incontinence among the three groups. The severity of the incontinence was only affected by the body mass index and the weight of the baby at the time of delivery. Conclusions: A relationship between perineal massage interventions and development of urinary incontinence has not been observed.

Epidemiology of pre-pregnancy body mass index (BMI) among mothers in Abu Dhabi, the United Arab Emirates

Pre-pregnancy obesity is a risk factor for several health problems such as gestational diabetes, preeclampsia, labor induction, postpartum hemorrhage, and neonatal hypoglycemia. Being underweight is a risk factor for fetal growth restriction. Despite the negative impact of abnormal pre-pregnancy body mass index (BMI) (over and underweight) on pregnancy outcomes, a limited amount of studies has been conducted on the prevalence of pre-pregnancy over and underweight and associated factors in the United Arab Emirates (UAE). Thus, the aim of this study was to investigate the prevalence and factors associated with underweight, overweight, and obesity among mothers with children under the age of 2 years in Abu Dhabi, the UAE. A cross-sectional multicenter study was conducted in 2017 and included data from seven government health care centers in Abu Dhabi. Maternal pre-pregnancy BMI was calculated as the weight in kilograms (kg) divided by the square of the height in meters (m), (kg/m2). A total of 1,622 mother–child pairs were included in this study. Out of the 1,622 mothers, 43 (2.7%) were underweight, 1,068 (65.8%) were normal weight, 412 (25.4%) were overweight, and 99 (6.1%) were obese. Mothers with advanced maternal age (AMA) (≥35 years) were more likely to be overweight, odds ratio [OR] = 1.93, (95% confidence interval [CI] 1.52–2.3), p ≤ 0.001, and obese OR = 2.15 (95% CI 1.32–3.39), p = 0.001. Mothers with lower family income were more likely to be obese OR = 2.72 (95% CI 1.44–5.93), p = 0.002. Mothers with high parity (≥2) were more likely to be overweight OR = 1.91 (95% CI 1.49–2.50), p ≤ 0.001; obese OR = 1.76 (95% CI 1.06–2.92), p = 0.024; and less likely to be underweight OR = 0.52 (95% CI 0.27–0.94), p = 0.037. Obese mothers were more likely to deliver via cesarean section (CS) OR = 1.95 (95% CI 1.27–2.96), p = 0.002. This study provides valuable baseline information on the epidemiology of pre-pregnancy BMI in the UAE. The sociodemographic factors identified in the study can be used to target at-risk women. The study findings can also be used to develop contextualized strategies to prevent and manage complications associated with abnormal pre-pregnancy BMI in Emirati women.

Quality of Life During Pregnancy from 2011 to 2021: Systematic Review

Purpose

Health-related quality of life (HRQoL) has emerged as a key concern in patient care. It has become one of the major objectives of clinical trials. Our study aims to describe the quality of life (QoL) during uncomplicated pregnancy and to assess its associated factors.

Patients and Methods

The search of articles was carried out using the online database of PUBMED and Web of Science with a limit of time between 2011 and 2021. Data were retrieved by two independent reviewers.

Results

721 publications responding to keywords were identified, of which 73 articles on the topic were selected. The main countries that have published on this subject are Australia (n = 10) and China (n = 7). Twenty-three articles deal with QoL for pathological pregnancies. All the pathologies studied have a negative impact on the HRQoL of pregnant women, and its improvement depends on the type of treatment. Obesity, low back, and pelvic girdle pain, and hyperemesis gravidarum were the frequent pathologies during pregnancy. Socio-demographic characteristics related to improved well-being (favorable economic status, social support). Similarly, better sleep quality and moderate physical exercise were linked to an increased QoL. Physical and psychological factors were associated with a lower QoL.

Conclusion

The HRQoL refers to patients’ subjective evaluation of physical, mental, and social components of well-being. Optimizing the QoL during pregnancy necessitates a deeper understanding of their issues as well as counseling which provides support wherever needed.

Protective Effect of Maternal First-Trimester Low Body Mass Index Against Macrosomia: A 10-Year Cross-Sectional Study

OBJECTIVE

We aimed to assess whether maternal first-trimester low body mass index (BMI) has a protective effect against macrosomia.

METHODS

This was a cross-sectional study from January 1, 2011, to June 30, 2021, and 84,900 participants were included. The predictive performance of maternal first-trimester and parental pre-pregnancy BMI for macrosomia was assessed using the area under the receiver-operating characteristics curve (AUC). Multivariate logistic regression analyses were performed to evaluate the independent effect of maternal first-trimester low BMI on macrosomia. Interactions were investigated to evaluate the potential variation of the effect of first-trimester low BMI across different groups. Furthermore, interactions were also examined across groups determined by multiple factors jointly: a) gestational diabetes mellitus (GDM)/GDM history status, parity, and maternal age; and b) GDM/GDM history status, fetal sex, and season of delivery.

RESULTS

The proportion of macrosomia was 6.14% (5,215 of 84,900). Maternal first-trimester BMI showed the best discrimination of macrosomia (all Delong tests: P < 0.001). The protective effect of maternal first-trimester low BMI against macrosomia remained significant after adjusting for all confounders of this study [adjusted odds ratios (aOR) = 0.37, 95% CI: 0.32-0.43]. Maternal first-trimester low BMI was inversely associated with macrosomia, irrespective of parity, fetal sex, season of delivery, maternal age, and GDM/GDM history status. The protective effect was most pronounced among pregnant women without GDM/GDM history aged 25 to 29 years old, irrespective of parity (multipara: aOR = 0.32, 95% CI: 0.22-0.47; nullipara: aOR = 0.32, 95% CI: 0.24-0.43). In multipara with GDM/GDM history, the protective effect of low BMI was only observed in the 30- to 34-year-old group (aOR = 0.12, 95% CI: 0.02-0.86). For pregnant women without GDM/GDM history, the protective effect of maternal first-trimester low BMI against macrosomia was the weakest in infants born in winter, irrespective of fetal sex (female: aOR = 0.45, 95% CI: 0.29-0.69; male: aOR = 0.39, 95% CI: 0.28-0.55).

CONCLUSION

Maternal first-trimester low BMI was inversely associated with macrosomia, and the protective effect was most pronounced among 25- to 29-year-old pregnant women without GDM/GDM history and was only found among 30- to 34-year-old multipara with GDM/GDM history. The protective effect of maternal first-trimester low BMI against macrosomia was the weakest in winter among mothers without GDM/GDM history.

Differential effect of pre-pregnancy low BMI on fetal macrosomia: a population-based cohort study

BACKGROUND

The differential effect of pre-pregnancy low BMI on macrosomia has not been fully addressed. Herein, we conducted a city-wide population-based cohort study to illuminate the association between pre-pregnancy low BMI and macrosomia, stratifying by maternal age, parity, and GDM status.

METHODS

All pregnant women who paid their first prenatal visit to the hospital in Qingdao during August 1, 2018, to June 30, 2020, were recruited to this study. The interactive effect of maternal age and pre-pregnancy low BMI on macrosomia was evaluated using logistic regression models, followed by strata-specific analyses.

RESULTS

A total of 105,768 mother-child pairs were included, and the proportion of fetal macrosomia was 11.66%. The interactive effect of maternal pre-pregnancy BMI and age was statistically significant on macrosomia irrespective of parity (nullipara: P_adjusted=0.0265; multipara: P_adjusted=0.0356). The protective effect of low BMI on macrosomia was most prominent among nullipara aged 35 years and above (aOR=0.16, 95% CI 0.05-0.49) and multipara aged 25 years and below (aOR=0.17, 95% CI 0.05-0.55). In nullipara without GDM, the risk estimates gradually declined with increasing conception age (20-to-24 years: aOR=0.64, 95% CI 0.51-0.80; 25-to-29 years: aOR=0.43 95% CI 0.36-0.52; 30-to-34 years: aOR=0.40 95% CI 0.29-0.53; and ≥35 years: aOR=0.19, 95% CI 0.06-0.60). A similar pattern could also be observed in nullipara with GDM, where the aOR for low BMI on macrosomia decreased from 0.54 (95% CI 0.32-0.93) in pregnant women aged 25-29 years to 0.30 (95% CI 0.12-0.75) among those aged 30-34 years. However, younger multiparous mothers, especially those aged 25 years and below without GDM (aOR=0.21, 95% CI 0.06-0.68), were more benefited from a lower BMI against the development of macrosomia.

CONCLUSIONS

Maternal low BMI is inversely associated with macrosomia irrespective of maternal age and parity. The impact of pre-pregnancy low BMI on macrosomia varied by maternal age and parity. The protective effect of a lower maternal BMI against fetal macrosomia was more prominent in nulliparous mothers aged 35 years and above, whereas multiparous mothers younger than 25 years of age were more benefited.

A matter of timing - At what age should multilevel surgery be performed in cerebral palsy patients?

A rather eventful decade draws to a close, but before the year concludes, we learn in this issue of the Biomedical Journal about the correlation of age with the improvement of motor functions in cerebral palsy patients after myofascial release surgery, and the impact on health and life quality of excessive weight during pregnancy. Moreover, we learn about differences in dexterity test norms between populations, and gain some insight into the latest improvements to the challenging medical study program in Taiwan. Finally, we attend an interesting discussion between experts of the field regarding the use of melatonin to protect the brains of preterm infants.