scholarly journals Pre-pregnancy body mass index does not impact live birth rate after frozen-thawed euploid embryo transfer: a retrospective cohort study

2021 ◽  
Author(s):  
Xitong Liu ◽  
Li Tian ◽  
He Cai ◽  
Juanzi Shi ◽  
Haiyan Bai
Keyword(s):  
Body Mass Index ◽  
Logistic Regression ◽  
Cohort Study ◽  
Live Birth ◽  
Retrospective Cohort Study ◽  
Significant Relationship ◽  
Retrospective Cohort ◽  
Birth Rate ◽  
Live Birth Rate ◽  
Normal Weight

Objective To assess the effects body mass index (BMI) on live birth rates in patients undergoing in vitro fertilization (IVF) with trophectoderm biopsy and preimplantation genetic testing for aneuploidies (PGT-A) when transferring a single euploid blastocyst. Design Retrospective cohort study. Setting Public fertility center in China. Population 821 women who underwent first cycle of frozen-thawed single euploid blastocyst transfer between 2012 and 2020. Methods Patients were grouped by World Health Organization (WHO) BMI class: underweight (<18.5, n=80), normal weight (18.5-24.9, n=602), overweight (25-30, n=112), and obese (≥30, n=27). A logistic regression model was used to assess the association between BMI and live birth while adjusting for potential confounders. Main outcome measures Live-birth rate was primary outcome. Results There was no difference in the birth weight, miscarriage, preterm birth, pregnancy complication, type of delivery and fetal gender by BMI category. The clinical pregnancy rate was higher in the overweight and obese groups. In multivariate logistic regression analysis, we fail to demonstrate a statistically significant relationship between BMI and live birth in underweight (adjusted odds ratio [AOR] 0.80; 95% confidence interval [CI], 0.47-1.35, p=0.402), overweight (AOR 0.85; 95% CI, 0.54-1.35, p=0.491) or obese (AOR 1.07; 95% CI, 0.48-2.38, p=0.864) patients compared with the normal weight reference group. Conclusion No statistically significant relationship was identified between BMI and live birth in patients undergoing IVF with PGT-A, suggesting that the negative impact of obesity on IVF and clinical outcomes may be related to aneuploidy.

scholarly journals Pregnancy Outcomes Following the First Frozen Blastocyst Transfer Among Women Aged Less Than 35 Years Old: A Retrospective Cohort Study

2021 ◽  
pp. 1-7
Author(s):  
Le Hoang ◽  
Le Duc Thang ◽  
Nguyen Thi Lien Huong ◽  
Nguyen Minh Thuy ◽  
Vu Thi Mai Anh ◽  
...  
Keyword(s):  
Cohort Study ◽  
Pregnancy Rate ◽  
Live Birth ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Birth Rate ◽  
Multiple Pregnancy ◽  
Live Birth Rate ◽  
Group 2 ◽  
Group 1

Background: Many guidelines have been issued regarding the number of embryos to be transferred after in vitro fertilization (IVF), but patients and clinicians may be reluctant to accept or offer a single embryo transfer due to the expected lower chance of pregnancy or live birth. This study was aimed to provide additional information on cycle outcome according to the number and quality of thawed transferred blastocysts. Methods:A retrospective cohort study was designed to collect the data of 505 patients who performed the first frozen blastocysts transfer at Tam Anh General Hospital from June 2018 to September 2019. One good-quality embryo was transferred for 121 patients (Group 1), two good for 214 patients (Group 2), one good and one poor for 112 patients (Group 3), one good and two poor for 25 patients (Group 4), and one or two poor for 33 patients (Group 5). Results:The pregnancy rate was 71.9%, 74.8%, 69.4%, 84.0%, and 39.4% in Group 1–5, respectively. The multiple pregnancy rate was 36.9%, 16.9%, and 32.0% in Groups 2–4, respectively, higher than Group 1 (4.9%). The live birth rate was 55.6%, 50.9%, and 60.0% in Group 2–4, respectively, but not significantly different from the Group 1 (47.9%). Conclusions:Transferring an additional good or poor embryo, along with a good embryo, does not increase the live birth rate while the incidence of multiple pregnancies rises significantly.

scholarly journals GnRH triggering may improve euploidy and live birth rate in hyper-responders: a retrospective cohort study

2020 ◽  
Vol 37 (8) ◽  
pp. 1939-1948
Author(s):  
Justin Tan ◽  
Chen Jing ◽  
Lisa Zhang ◽  
Jasmine Lo ◽  
Arohumam Kan ◽  
...  
Keyword(s):  
Cohort Study ◽  
Live Birth ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Birth Rate ◽  
Live Birth Rate

scholarly journals Treatment-independent live birth after in-vitro fertilisation: a retrospective cohort study of 2,133 women

2019 ◽  
Vol 34 (8) ◽  
pp. 1470-1478 ◽  
Author(s):  
Yousuf ElMokhallalati ◽  
Rik van Eekelen ◽  
Siladitya Bhattacharya ◽  
David J McLernon
Keyword(s):  
Cohort Study ◽  
Live Birth ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Birth Rate ◽  
Cox Regression ◽  
Live Birth Rate ◽  
In Vitro Fertilisation ◽  
North East

Abstract STUDY QUESTION What is the chance of a treatment-independent live birth following IVF (including ICSI) treatment? SUMMARY ANSWER Over 5 years of follow-up, the treatment-independent live birth rate was 17% in unsuccessfully treated women and 15% in those who had a live birth after IVF. WHAT IS KNOWN ALREADY A limited number of studies have investigated the chance of treatment-independent conception following completion of IVF, but most of them have been based on surveys with poor response rates and limited sample sizes. STUDY DESIGN, SIZE, DURATION This is a population-based, retrospective cohort study of 2133 women who received IVF treatment between 1998 and 2011 at a single regional IVF Unit and were followed for a minimum of 1 year and maximum of 15 years after their last IVF or ICSI treatment cycle. PARTICIPANTS/MATERIALS, SETTING, METHODS This study included all women, residing in the north-east of the UK, who attended the Aberdeen Fertility Clinic and received IVF treatment between 1998 and 2011. Clinical and diagnostic information of all women was linked with treatment and pregnancy outcome data. A total of 2133 women were divided into two groups: (i) those who achieved a live birth following successful IVF or ICSI treatment (n = 1060) and (ii) those in whom treatment was unsuccessful i.e. resulted in either no pregnancy or pregnancy loss (n = 1073). The two groups were followed from the date of the last embryo transfer until the first treatment-independent live birth or 31 December 2012, whichever came first. The primary outcome was the treatment-independent live birth rate at 1, 2.5, 5 and 10 years of follow-up. Cox regression was used to determine factors associated with treatment-independent live birth in each group. MAIN RESULTS AND THE ROLE OF CHANCE Within 5 years of follow-up, the treatment-independent live birth rate was 17% (95% CI, 15–19%) among women whose IVF or ICSI treatment was unsuccessful and 15% (95% CI, 12–17%) among women whose treatment resulted in live birth. In both groups, shorter duration of infertility, younger female age and IVF as compared to ICSI were associated with a higher chance of achieving treatment-independent live birth. Among unsuccessfully treated women, the chance of post-IVF live birth was reduced in those with tubal factor infertility. Three or more previous IVF or ICSI embryo transfers were associated with a lower chance of treatment-independent live birth among successfully treated women. LIMITATIONS, REASONS FOR CAUTION The study was conducted in a single fertility centre, which could compromise the generalizability of the findings. Moreover, data were unavailable on the women’s use of contraception or active attempts to get pregnant, both of which could influence treatment-independent live birth rates. WIDER IMPLICATIONS OF THE FINDINGS This study provides a better understanding of the long-term prognosis for treatment-independent live birth after completion of IVF or ICSI treatment. The results will inform women of their chances of a treatment-independent live birth following failed or successful treatment and the factors that are associated with it. STUDY FUNDING/COMPETING INTEREST(S) This work was funded by a Chief Scientist Office Postdoctoral Training Fellowship in Health Services Research and Health of the Public Research (Ref PDF/12/06). The views expressed here are those of the authors and not necessarily those of the Chief Scientist Office. The authors have no competing interests. TRIAL REGISTRATION NUMBER Not applicable.

scholarly journals Low BMI is associated with poor IUI outcomes: a retrospective study in 13,745 cycles

2021 ◽  
Author(s):  
Juan Zhen ◽  
Jiali Cai ◽  
Lanlan Liu ◽  
Yanwen Guo ◽  
Jingxue Sun ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Mass ◽  
Live Birth ◽  
Birth Rate ◽  
Cox Regression ◽  
Endometrial Thickness ◽  
Intrauterine Insemination ◽  
Live Birth Rate ◽  
Normal Weight ◽  
Low Bmi

Abstract Objective: To evaluate the association between body mass index (BMI) and pregnancy outcomes in women receiving intrauterine insemination (IUI) treatment． Design: Retrospective cohort study. Setting: University-affiliated hospital. Population: Six thousand four hundred and seven women undergoing 13,745 IUI cycles stratified by body mass index (BMI). Method: Cox regression was used to analyze the association between BMI and cumulative live birth across multiple IUI cycles. GEE was used to analyze the live birth rate per cycle. Main Outcome Measure(s): Cumulative outcomes for IUI cycles. Result(s): Compared with normal weight women (n = 4,563), underweight women (n = 990) had a lower cumulative pregnancy and live birth rate (20.71% vs 25.93%, 17.07% vs 21.61%, respectively), while overweight women (n = 854) had a higher cumulative pregnancy and live birth rate (31.97%, 26.58%). Adjusted for confounders, hazard Ratio (HR) for achieving live birth following up to a maximal of 4 IUI cycles was 0.8(95%CI: 0.67-0.95) comparing underweight with normal weight. In generalized estimating equation (GEE) analyses, low BMI was also associated with a lower per-cycle live birth rate 0.77(95%CI: 0.64-0.92) with adjustment for cycle-specific parameters, including ovarian stimulation, endometrial thickness and follicular diameter. Conclusion(s): Underweight is associated with poor IUI outcomes. Funding: Clinical Research Special Fund of Chinese Medical Association (NO.18010360765) and Xiamen Medical Advantage Subspecialty Construction Project (2018[296])

scholarly journals Body mass index and clinical outcomes in patients after ischaemic stroke in South Korea: a retrospective cohort study

BMJ Open ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. e028880
Author(s):  
HeeKyoung Choi ◽  
Hyo Suk Nam ◽  
Euna Han
Keyword(s):  
Body Mass Index ◽  
Cohort Study ◽  
Ischaemic Stroke ◽  
Mortality Risk ◽  
Retrospective Cohort Study ◽  
Retrospective Cohort ◽  
Normal Weight ◽  
All Cause Mortality ◽  
Related Mortality

ObjectivesAlthough obesity is a risk factor for stroke, its impact on mortality in patients with stroke remains unclear. In this study, we aimed to evaluate the relationship between body mass index (BMI) and mortality due to ischaemic stroke among adults aged 20 years and above in Korea.DesignRetrospective cohort study.SettingA tertiary-hospital-based stroke registry linked to the death records.Participants3599 patients admitted for ischaemic stroke from January 2007 to June 2013.Outcome measuresThe HRs for all-cause and stroke-related mortality were calculated using Cox proportional hazards models. Progression from stroke-related mortality was assessed using the Fine-Grey competing risk model, treating other-cause mortality as a competing risk. Adjustments were made for age, gender, smoking status, Charlson comorbidity index, cardiovascular or non-cardiovascular comorbidities, stroke severity, severity related to other medical conditions, complications and enrolment year. We repeated the analysis with stratification based on age groups (less than 65 vs 65 years and above).ResultsFor stroke-related mortality, there was no significant difference among the four BMI groups. The risk of all-cause mortality was 36% higher in the underweight group than in the normal weight group (long-term HR=1.36, 95% CI: 1.04 to 1.79), whereas the mortality risk of the obese group was significantly lower (HR=0.66, 95% CI: 0.54 to 0.81). Although this relationship was not estimated in the younger group, it was found that obesity had a protective effect on the all-cause mortality in the elderly (long-term HR=0.66, 95% CI: 0.52 to 0.83).ConclusionsObesity is more likely to reduce mortality risk than normal weight, especially in elderly patients.

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