Statistical analysis
ANEUPLOIDY
PSM was used to identify the patients with or without GH supplement who were most similar in baseline and stimulation characteristics and to adjust for confounders related to aneuploidy. The variables in the PSM included indications for PGT-A, age, BMI, number of previous OS cycles, basal estradiol (E2), FSH, AMH, and AFC levels, duration of stimulation, and total dosage of gonadotropins. The PSM was carried out using a caliper width of 0.2 of the standard deviation (SD) of the logit of the propensity score and 1:2 ratio by nearest neighbor matching. Women who were not matched were excluded from further analyses.According to the data from our IVF center, approximately 25% of patients with AMA can obtain ≥ 1 euploid blastocyst in a PGT-A cycle (unpublished data). As this proportion is supposed to be 40% in patients with AMA after GH supplement according to a previous study [Values are presented as average ± SD for continuous data and compared using Student’s t-test or Mann–Whitney U test. Categorical variables were expressed as frequency and percentage, and between-group differences were assessed using Pearson’s chi-square test or Fisher’s exact test as appropriate. Subgroup analyses were performed stratified by age groups [