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Open AccessJournal ArticleDOI

Effect of body mass index on IVF treatment outcome: an updated systematic review and meta-analysis

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TLDR
Raised BMI is associated with adverse pregnancy outcome in women undergoing IVF/ICSI treatment, including lower live birth rates, present in overweight as well as obese women.
Abstract
There is conflicting evidence regarding the effect of raised body mass index (BMI) on the outcome of assisted reproductive technology In particular, there is insufficient evidence to describe the effect of BMI on live birth rates We carried out a systematic review and meta-analysis of studies to evaluate the effect of raised BMI on treatment outcome following IVF/ICSI treatment Subgroup analysis on overweight and obese patients was performed Literature searches were conducted on MEDLINE, EMBASE and the Web of Science from 1966 to 2010 Thirty-three studies including 47,967 treatment cycles were included Results indicated that women who were overweight or obese (BMI ≥ 25) had significantly lower clinical pregnancy (RR=090, P<00001) and live birth rates (RR=084, P=00002) and significantly higher miscarriage rate (RR=131, P < 00001) compared to women with a BMI < 25 following treatment A subgroup analysis of overweight women (BMI ≥ 25-299) revealed lower clinical pregnancy (RR=091, P=00003) and live birth rates (RR=091, P=001) and higher miscarriage rate (RR=124, P < 000001) compared to women with normal weight (BMI < 25) In conclusion, raised BMI is associated with adverse pregnancy outcome in women undergoing IVF/ICSI treatment, including lower live birth rates This effect is present in overweight as well as obese women

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Oocyte environment: follicular fluid and cumulus cells are critical for oocyte health

TL;DR: Recent technologies are now exploring transcriptional, translational, and post-translational events within the human follicle with the goal of identifying biomarkers that reliably predict oocyte quality in the clinical setting.
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Mitochondrial dysfunction in oocytes of obese mothers: transmission to offspring and reversal by pharmacological endoplasmic reticulum stress inhibitors

TL;DR: It is demonstrated that obesity before conception imparts a legacy of mitochondrial loss in offspring that is caused by ER stress and is reversible during the final stages of oocyte development and maturation.
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Impact of obesity on infertility in women.

TL;DR: Overweight women have a higher incidence of menstrual dysfunction and anovulation, and are at a high risk for reproductive health, and weight loss has beneficial effects on the reproductive outcomes in patients.
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Female obesity and infertility.

TL;DR: The mechanism with which obesity impacts female reproductive function and the consequences in terms of the associated morbidity and mortality have also been increasing is summarised in this review.
References
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Journal ArticleDOI

Meta-Analysis in Clinical Trials*

TL;DR: This paper examines eight published reviews each reporting results from several related trials in order to evaluate the efficacy of a certain treatment for a specified medical condition and suggests a simple noniterative procedure for characterizing the distribution of treatment effects in a series of studies.
Journal ArticleDOI

Quantifying heterogeneity in a meta‐analysis

TL;DR: It is concluded that H and I2, which can usually be calculated for published meta-analyses, are particularly useful summaries of the impact of heterogeneity, and one or both should be presented in publishedMeta-an analyses in preference to the test for heterogeneity.
Journal ArticleDOI

Statistical Aspects of the Analysis of Data From Retrospective Studies of Disease

TL;DR: In this paper, the role and limitations of retrospective investigations of factors possibly associated with the occurrence of a disease are discussed and their relationship to forward-type studies emphasized, and examples of situations in which misleading associations could arise through the use of inappropriate control groups are presented.
Book ChapterDOI

Obesity and Overweight

TL;DR: Overweight or obesity in adolescents has reache epidemic proportions in the USA and other industr alized countries and these conditions, although lumped together in research and in commentarie reflect adolescents’ being toward the heavier point a continuum that would range from underweight morbidly obese.
Journal ArticleDOI

Maternal age and fetal loss: population based register linkage study

TL;DR: Fetal loss is high in women in their late 30s or older, irrespective of reproductive history, and should be taken into consideration in pregnancy planning and counselling.
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