Elevation of progesterone on the trigger day exerts no carryover effect on live birth in freeze-all cycles.

To evaluate the effect of trigger day progesterone (P) levels on live birth in freeze-all cycles. Retrospective analysis of 1034 freeze-all female patients aged <38 years with single blastocyst transfers. Patients with ( Estradiol (E2) levels on trigger day, the number of oocytes retrieved and the number of mature oocytes increased significantly with increasing serum The proposal that trigger day progesterone elevation (PE) exerts a detrimental effect on oocyte and embryo competence has no clinical validity.