Objective sleep duration and timing predicts completion of in vitro fertilization cycle

Combined impact of sleep and obesity on female infertility in the NHANES 2017-2020

BACKGROUND

Sleep health and obesity may affect the risk of female infertility. However, few studies focused on the interaction of obesity and sleep health on the female infertility risk. This study aimed to evaluate the combined impact of trouble sleeping / sleep duration and overweight/obesity/ abdominal obesity on the risk of female infertility.

METHODS

The data for this cross-sectional study was obtained from National Health and Nutritional Examination Survey, which provided information on trouble sleeping, sleep duration, overweight/obesity, abdominal obesity, and confounding factors. Adopted weighted univariate and multivariate logistic regression models to explore the relationship between trouble sleeping, sleep duration, overweight/obesity, abdominal obesity, and the risk of infertility, respectively, and the combined effect of trouble sleeping and overweight/obesity, trouble sleeping and abdominal obesity, sleep duration and overweight/obesity, sleep duration and abdominal obesity, on the female infertility risk.

RESULTS

This study included a total of 1,577 women, and 191 were diagnosed with infertility. Women with infertility had a higher proportion of people with overweight/obesity, abdominal obesity, sleep duration ≤ 7 h and trouble sleeping than those with non-infertility. The result indicated that trouble sleeping [odds ratio (OR) = 2.25, 95% confidence intervals (CI): 1.49-3.39], sleep duration ≤ 7 h (OR = 1.59, 95% CI: 1.03-2.48), and the combined impact of abdominal obesity and trouble sleeping (OR = 2.18, 95% CI: 1.28-3.72), abdominal obesity and sleep duration ≤ 7 h (OR = 2.00, 95% CI: 1.17-3.40), overweight/obesity and trouble sleeping (OR = 2.29, 95% CI: 1.24-4.26), and overweight/obesity and sleep duration ≤ 7 h (OR = 1.88, 95% CI: 1.01-3.49) were associated with increased odds of infertility, respectively.

CONCLUSION

There was combined effects of trouble sleeping/sleep duration ≤ 7 h and overweight/obesity/ abdominal obesity on increased odds of female infertility.

The impact of chronic insomnia disorder on menstruation and ovarian reserve in childbearing-age women: A cross-sectional study

OBJECTIVE

Diminished ovarian reserve (DOR) is a disorder characterized by impaired ovarian function. Sleep disorders are disruptions of the circadian rhythm, which appears to be closely linked to reproductive systems. This study aimed to investigate the impact of poor sleep quality on the ovarian reserve of childbearing-age women.

METHODS

A cross-sectional study was conducted in China from June 2021 to March 2023. In total, 102 participants diagnosed with chronic insomnia disorder were included in the study. Questionnaires were administered to assess participants' menstrual patterns, insomnia severity, anxiety, and depression. The anti-Müllerian hormone level and the basal antral follicle count were measured for ovarian reserve evaluation. Correlation analysis and ordinal logistic regression analysis were conducted.

RESULTS

The women with insomnia presented high percentages of hypomenorrhea, premenstrual syndrome, and dysmenorrhea (78.4%, 74.5%, and 46.1%, respectively). Severe sleep disorder in the past month was identified as an independent risk factor for hypomenorrhea and premenstrual syndrome (odds ratio [OR], 2.64 and OR, 2.688; p<0.05). The prevalence of DOR among women with insomnia (33.3%) was significantly higher than the average reported in previous studies for young women. Insomnia duration exceeding 1 year was determined to be an independent risk factor for DOR in women aged 36 to 40 years (OR, 4.5; p=0.033).

CONCLUSION

This study highlights the association between sleep disorders and menstrual problems. Prolonged poor sleep quality in women aged 36 to 40 years was identified as a significant risk factor for DOR. We should pay more attention to improving sleep quality in order to maintain normal ovarian function.

Sleep quality, perceived stress and associated factors in women undergoing IVF treatment: short-term longitudinal study

BACKGROUND

Despite limited studies in the literature, it is hypothesised that lifestyle factors are modifiable habits that have an impact on couples' fertility health. However, the relationship between sleep quality and infertility is an area that needs to be clarified.

OBJECTIVE

To determine sleep quality and associated factors in women receiving in vitro fertilisation treatment and to evaluate the changes in sleep over the treatment cycle.

METHODS

This is a longitudinal descriptive study conducted on 158 women in two infertility centres in Izmir, Turkey. Data were collected using the Personal Introduction Form, Pittsburgh Sleep Quality Index, Visual Analogue Stress Scale, and Physical Symptoms List. Data were collected during three different treatment periods: beginning of the in vitro fertilisation trial, oocyte pick-up day and the postembryo transfer period.

RESULTS

The sleep quality score of women progressively decreased as treatment progressed (p < .001). A strong positive correlation was determined between stress and sleep quality (p < .001). Additionally, advanced age, low education level, shift work, prolonged treatment and economic distress were associated with poorer sleep quality (p < .001). In addition, breast fullness, abdominal distension, and pain (p < .001) observed until the oocyte pick-up day, as well as nausea and fatigue during the postembryo transfer period (p < .001), were identified as physical symptoms affecting sleep quality.

CONCLUSION

This article provides information on sleep quality during in vitro fertilisation and guides healthcare professionals to encourage and improve women's sleep quality.

The relationship between infertility and sleep quality in women: Systematic review and meta-analysis

OBJECTIVES

This systematic review and meta-analysis study aimed to examine the relationship between infertility and sleep quality in women.

METHODS

The literature search was conducted between October and November 2022 with full-text studies from PubMed (MEDLINE), Cochrane, Google Scholar, and Scientific Information Database (SID). The study is based on the recommendations of the Cochrane guidelines. The data were analyzed using the Review Manager computer software (Version 5.3).

RESULTS

A systematic literature review was conducted, with 11 studies included. The meta-analysis revealed a significant difference between infertility and sleep quality in women, that the sleep quality of infertile patients decreased (SMD: -0.75 95% CI: -0.84 to -0.66, Z = 16.46, P < .00001), and that there was a significant difference between infertility and depression (SMD: -0.18 95% CI: -0.27 to -0.09, Z = 4.00, P < .0001).

CONCLUSION

The results of this study indicate that sleep quality is low in infertile women. PROSPERO ID: (CRD42023404389).

Effect of obstructive sleep apnea on in vitro fertilization outcomes in women with polycystic ovary syndrome

STUDY OBJECTIVES

Polycystic ovary syndrome (PCOS) confers a high risk of obstructive sleep apnea (OSA). Here we investigated the effect of OSA on first in vitro fertilization (IVF) cycle metrics and outcomes in patients with PCOS.

METHODS

This was a prospective cohort study of patients with PCOS undergoing their first IVF at a single tertiary center between October 1, 2021, and September 30, 2022. Patients were screened for OSA before IVF and grouped accordingly. Clinical and IVF cycle data were compared between groups.

RESULTS

OSA was found in 37.2% of 156 patients with PCOS, with longer infertility duration (4.3 ± 2.5 vs. 3.4 ± 2.0 years) and lower levels of anti-Müllerian and luteinizing hormones than patients without OSA (6.44 ± 2.96 vs 8.69 ± 4.03 µg/L and 6.30 ± 5.02 vs 8.46 ± 6.09 U/L). Antral follicle count was lower in patients with OSA (28.9 ± 12.4 vs 33.2 ± 12.9). During ovarian stimulation, patients with OSA required significantly higher doses of gonadotropin (2080.8 ± 1008.7 vs 1682.8 ± 619.9 U) and had lower peak estradiol level (4473.5 ± 2693.0 vs 5455.7 ± 2955.1 pmol/L) and fewer retrieved oocytes, high-quality, and available embryos (17.8 ± 7.2 vs 21.9 ± 10.5, 4.5 ± 4.4 vs 6.2 ± 4.6, 5.2 ± 4.3 vs 7.4 ± 5.0). Eleven patients were excluded for having no embryos or missing transfer. Therefore, we analyzed the outcome of the first embryo transfer in 145 patients. The biochemical and clinical pregnancy rates were lower in patients with OSA than patients without OSA (51.9% vs 66.7% and 42.3% vs 60.2%). OSA was independently associated with clinical pregnancy rate after controlling for several confounders (P = .043).

CONCLUSIONS

OSA impairs female fertility in patients with polycystic ovary syndrome, suggesting an adverse effect on in vitro fertilization cycle stimulation characteristics and clinical outcomes.

CITATION

Zhang Q, Wang Z, Ding J, et al. Effect of obstructive sleep apnea on in vitro fertilization outcomes in women with polycystic ovary syndrome. J Clin Sleep Med. 2024;20(1):31-38.

Sleep-associated insulin resistance promotes neurodegeneration

Lifestyle modification can lead to numerous health issues closely associated with sleep. Sleep deprivation and disturbances significantly affect inflammation, immunity, neurodegeneration, cognitive depletion, memory impairment, neuroplasticity, and insulin resistance. Sleep significantly impacts brain and memory formation, toxin excretion, hormonal function, metabolism, and motor and cognitive functions. Sleep restriction associated with insulin resistance affects these functions by interfering with the insulin signalling pathway, neurotransmission, inflammatory pathways, and plasticity of neurons. So, in this review, We discuss the evidence that suggests that neurodegeneration occurs via sleep and is associated with insulin resistance, along with the insulin signalling pathways involved in neurodegeneration and neuroplasticity, while exploring the role of hormones in these conditions.

Chronotype and sleep duration interact to influence time to pregnancy: Results from a New York City cohort

STUDY OBJECTIVE

To study associations between nighttime sleep characteristics and time to pregnancy.

METHODS

Pregnant people age ≥18 years and<18 weeks' gestation were recruited from 3 New York University Grossman School of Medicine affiliated hospitals in Manhattan and Brooklyn (n = 1428) and enrolled into the New York University Children's Health and Environment Study. Participants in the first trimester of pregnancy were asked to recall their time to pregnancy and their sleep characteristics in the 3 months before conception.

RESULTS

Participants who reported sleeping<7 hours per night tended to have shorter time to pregnancy than those who slept 7-9 hours per night (adjusted fecundability odds ratio = 1.16, 95% confidence interval: 0.94, 1.41). Participants with a sleep midpoint of 4 AM or later tended to have longer time to pregnancy compared with those with earlier sleep midpoints (before 4 AM) (adjusted fecundability odds ratio = 0.88, 95% confidence interval: 0.74, 1.04). When stratified by sleep midpoint, sleeping<7 hours was significantly associated with shorter time to pregnancy only among those whose sleep midpoint was before 4 AM (adjusted fecundability odds ratio = 1.33, 95% confidence interval: 1.07, 1.67).

CONCLUSIONS

The association of sleep duration with time to pregnancy was modified by chronotype, suggesting that both biological and behavioral aspects of sleep may influence fecundability.

Preconception sleep duration, sleep timing, and shift work in association with fecundability and live birth among women with a history of pregnancy loss

OBJECTIVE

To evaluate the associations between preconception sleep characteristics and shift work with fecundability and live birth.

DESIGN

Secondary analysis of the Effects of Aspirin in Gestation and Reproduction study, a preconception cohort.

SETTING

Four US academic medical centers.

PATIENT(S)

Women aged 18-40 with a history of 1-2 pregnancy losses who were attempting to conceive again.

INTERVENTION(S)

Not applicable.

MAIN OUTCOME MEASURES(S)

We evaluated baseline, self-reported sleep duration, sleep midpoint, social jetlag, and shift work among 1,228 women who were observed for ≤6 cycles of pregnancy attempts to ascertain fecundability. We ascertained live birth at the end of follow up via chart abstraction. We estimated fecundability odds ratios (FORs) using discrete, Cox proportional hazards models and risk ratios (RRs) for live birth using log-Poisson models.

RESULT(S)

Sleep duration ≥9 vs. 7 to <8 hours (FOR: 0.81, 95% confidence interval [CI], 0.61; 1.08), later sleep midpoints (3rd tertile vs. 2nd tertile: FOR: 0.85; 95% CI, 0.69, 1.04) and social jetlag (continuous per hour; FOR: 0.93, 95% CI: 0.86, 1.00) were not associated with reduced fecundability. In sensitivity analyses, excluding shift workers, sleep duration ≥9 vs. 7 to <8 hours (FOR: 0.62; 95% CI, 0.42; 0.93) was associated with low fecundability. Night shift work was not associated with fecundability (vs. non-night shift work FOR: 1.17, 95% CI, 0.96; 1.42). Preconception sleep was not associated with live birth.

CONCLUSION(S)

Overall, there does not appear to be a strong association between sleep characteristics, fecundability, and live birth. Although these findings may suggest weak and imprecise associations with some sleep characteristics, our findings should be evaluated in larger cohorts of women with extremes of sleep characteristics.

CLINICAL TRIAL REGISTRATION NUMBER

Clinicaltrials.gov NCT00467363.

Women's quality of sleep and in vitro fertilization success

Women undergoing in vitro fertilization (IVF) are emotionally challenged. Anxiety, depression, and sleep disturbances are common complaints. The impact of these symptoms on IVF outcome is however debated. In this study, we aimed at investigating whether sleep quality and psychological health can affect the chances of success of the procedure. Women undergoing IVF were recruited at the time of oocytes retrieval. Women's sleep quality and psychological health was assessed using the Pittsburgh Sleep Quality Index (PSQI), the Fertility Problem Inventory (FPI), and the Hospital Anxiety and Depression Scale (HADS). Baseline characteristics and results of the three scales were compared between women who did and did not succeed. Overall, 263 women were included, of whom 81 had a clinical pregnancy (31%). As expected, successful women were younger, and their ovarian reserve was more preserved. FPI and HADS scores did not differ. Conversely, a statistically significant difference emerged for the PSQI score, the median [interquartile range] in pregnant and non-pregnant women being 4 [3-5] and 5 [3-7], respectively (p = 0.004). The crude and adjusted OR of pregnancy in women with a PSQI > 5 (indicating impaired sleep quality) was 0.46 (95% CI 0.25-0.86, p = 0.02) and 0.50 (95% CI: 0.26-0.94, p = 0.03), respectively. In conclusion, low sleep quality is common in women scheduled for IVF and could influence the success of the procedure.

Human fertility and sleep disturbances: A narrative review

INTRODUCTION

Many factors may be hidden behind the global fertility decline observed in Western countries. Alongside the progressively increased age of infertile couples, environmental and behavioural factors, including non-optimal lifestyle habits, should be considered. Among these, sleep disorders have been suggested to be linked to human fertility.

METHODS

This is a narrative review, describing first sleep physiology, its disturbances, and the tools able to quantify sleep dysfunction. Then, we consider all available studies aimed at investigating the connection between sleep disorders and human fertility, providing a comprehensive view on this topic.

RESULTS

Forty-two studies investigating the relationship between sleep habits and human reproduction were included. All the published evidence was grouped according to the aspect of human fertility considered, i.e. i) female reproductive functions, ii) male reproductive functions, iii) natural conception and iv) assisted reproduction. For each of the sub-groups considered, the connection between sleep dysregulation and human fertility was classified according to specific sleep characteristics, such as sleep duration, quality, and habits. In addition, possible physio-pathological mechanisms proposed to support the link between sleep and fertility were summarized.

CONCLUSION

This review summarizes the most relevant findings about the intricate and still largely unknown network of molecular pathways involved in the regulation of circadian homeostasis, to which sleep contributes, essential for reproductive physiology. Thus, many mechanisms seem correlate sleep disorders to reproductive health, such as adrenal activation, circadian dysregulation, and genetic influences. This review highlights the need to properly designed trials on the topic.