Descriptive analysis of participants’ characteristics
A total of 1072 LM women and 4219 general IVF women were included in
this study. The baseline characteristics of women in each group are
shown in Table Ⅰ. Most of the baseline data in subgroups were
comparable with the general IVF population (gIVF group). Compared with
the gIVF group, women in ceLM group were younger (30.13±3.84 vs.
29.31±3.85, P=0.000). Notably, women in the unLM and ceLM groups had a
higher BMI index (23.35±3.63 vs. 24.11±3.85, P=0.001; 23.35±3.63 vs.
25.00±3.97, P=0.000 respectively), and more of them were diagnosed with
PCOS (18.82% vs. 25.33%, P=0.001;18.82% vs. 37.86%, P=0.000
respectively), according to basal hormone levels, the number of
bilateral antral follicles and previous menstrual history(20).