Comparison of progestin‐primed ovarian stimulation regimen and antagonist regimen in women aged 35 years or older with diminished ovarian reserve: A propensity score‐matched study

Objective Diminished ovarian reserve (DOR) has been a major challenge in infertility treatment. The present study aimed to compare the efficacy of progestin‐primed ovarian stimulation (PPOS) regimen and antagonist regimen in infertile patients aged 35 years or older with DOR. Methods A retrospective study of 289 in vitro fertilization (IVF) cycles from April 2016 to June 2022 was performed. Propensity score matching (PSM) was used to balance the baseline characteristics between the two groups at a ratio of 1:1. Results After matching, there were 87 cycles in the PPOS group and 87 cycles in the antagonist group. The primary outcome measures included the incidence of premature LH surge, the number of retrieved oocytes, and the number of mature oocytes, which were comparable between the two groups (all P values >0.05). There were no significant differences in laboratory indicators and final clinical outcomes between the two groups (all P values >0.05). Conclusions For DOR patients aged 35 years or older, the number of retrieved oocytes and the number of mature oocytes were comparable between the PPOS and antagonist groups. Moreover, the two regimens showed no difference in the inhibition of premature LH surge.