Strengths and limitations
Our present work has some strength of note. Firstly, we adjusted more variables to ensure that the result was more reliable. Secondly, proper statistical methods and sensitivity analysis ensure structural stability. Thirdly, the study included solely women underwent PGT-A to cleanly analyze the impact of BMI on live birth. Last but not least, we only included women in the first cycle of FET, thus avoiding bias from multiple cycles.
There are some limitations to this study, such as its retrospective nature, which reduces its direct application to clinical practice. The study question would best be addressed by a multicenter, prospective trial. Our study is also limited by the relatively small proportion of overweight and obese women in our cohort.