The Impact of Parental Preconception Body Mass Index on the Outcomes of in vitro Fertilization-Embryo Transfer and Newborns' Outcomes.

Objective: Associations between parental pre-pregnancy BMI in IVF/ICSI fresh embryo transfer cycles and neonatal outcomes were investigated through a retrospective analysis. Methods: A retrospective analysis of Couples who underwent IVF/ICSI fresh embryo transfer 1340 cycles from January 2019 to December 2021 was conducted in the Department of Reproductive Medicine of our hospital. Based on the preconception BMI of parents, they were divided into four groups: Group A (both father and mother with BMI < 25 kg/m²), Group B (father with BMI < 25 kg/m² and mother with BMI ≥ 25 kg/m²), Group C (father with BMI ≥ 25 kg/m² and mother with BMI < 25 kg/m²), and Group D (both father and mother with BMI ≥ 25 kg/m²). The differences in baseline characteristics, fertilization and embryo development, pregnancy outcomes, and neonatal outcomes were compared among the groups. Results: In the IVF cycles, Group A had a higher rate of normal fertilization compared to three other groups, Group A is significantly higher than Group D, with statistical significance (P < .05). In the ICSI cycles, there were no significant differences among the four groups regarding normal fertilization rate, day 3 high-quality embryo rate, blastocyst formation rate, and high blastocyst rate. Univariate and multivariate analysis results showed no significant differences in clinical pregnancy and live birth rates among the four groups. However, Group D had a significantly higher rate of preterm birth than other three groups, with statistical significance (P < .05). Conclusion: To achieve better clinical outcomes and neonatal outcomes, overweight or obese couples should lose weight before undergoing IVF/ICSI treatment.

The Feasibility of Choosing D4 Embryo Transfer-Analysis of Nanomaterials Affecting the Outcome of Frozen-Thaw Embryo Transfer.

FET is to resuscitate the endometrium and transfer the embryo into the uterus after the endometrium is ready. The quality of transferred embryos is an important factor affecting the outcome of assisted reproductive technology. This paper aims to explore the feasibility of D4 frozen-thaw embryo transfer and analysis of related factors affecting the outcome of freeze-thaw embryo transfer. A retrospective analysis of the clinical data of 2925 patients who received frozen-thaw embryo transfer (FET) in the Department of Reproductive Medicine, General Hospital of Northern Theater Command from January 1, 2017 to July 31, 2019. Including the woman's age, body mass index (BMI), endometrial thickness on the day of transplantation, number of embryos to be transferred, and type of embryos to be transferred. A single factor, multivariate logistic regression and nomogram were used to analyze the influence of different factors on the clinical outcome of FET. Nanomedicines and related nanomedicines are rapidly developing and establishing their importance in embryo transfer. This paper uses nanomaterials to explore the feasibility of D4 frozen-thawed embryo transfer. The woman's age, endometrial thickness on the day of transplantation, BMI, the number of embryos transferred, and the type of embryos transferred all affect the outcome of FET. The pregnancy rate of the D5 and D4 transplantation groups was, respectively, higher than that of the D3 transplantation group, with statistically significant differences. In the FET cycle, the age of the woman, endometrial thickness on the day of transplantation, the number of embryos transferred, and the type of embryos transferred are all independent factors influencing the outcome of FET. D5 blastocyst is the easiest to get pregnant, and that has the best clinical outcome which is better than the D6 blastocyst group; D4 morula and D5 blastocyst FET have little difference in clinical pregnancy outcomes, but both of them are significantly better than D3 cell embryos, so D4 morula can be considered for transplantation in the FET cycle. In conclusion, whether it is a patient who has failed the fresh cycle transplantation or the whole embryo freezing cycle whose transplantation is canceled due to high hormone levels on the transplantation day, FET is required.