Background There is a lack of consensus on the optimal dose and form of progesterone
supplementation during frozen‐thawed embryo transfer with hormone replacement therapy …

Objective To evaluate if an elevated progesterone (P) level on the day of human chorionic
gonadotropin (hCG) administration is associated with a decrease in live-birth rate in patients …

Objective To compare the effect of progesterone (P) on the day of trigger in fresh assisted
reproduction technology (ART) transfer cycles versus its effect on subsequent frozen embryo …

Despite the worldwide increase in frozen embryo transfer, the search for the best protocol to
prime endometrium continues. Well-designed trials comparing various frozen embryo …

STUDY QUESTION Is there a relationship between serum progesterone (P) and endometrial
volume on the day of embryo transfer (ET) with ongoing pregnancy rate (OPR) in artificial …

Objective To determine if an increase in plasma P occurring before hCG administration
might impair the outcome of IVF-ET. Design Five hundred eighty-five IVF-ET cycles were …

Research question What factors determine serum progesterone concentrations the day
before cryopreserved embryo transfer in artificially prepared cycles? Design Retrospective …

STUDY QUESTION How does the duration of estrogen (E2) treatment prior to frozen-
blastocyst transfers affect the live birth rate (LBR)? SUMMARY ANSWER Prolonged E2 …

OBJECTIVE: To see if progesterone support has a beneficial effect on live birth rate after
frozen embryo transfer in natural cycles. DESIGN: Prospective randomized controlled trial …

Research question Do serum progesterone levels determine ongoing pregnancy rates
(OPR) in hormone replacement therapy frozen–thawed embryo transfer (HRT–FET) cycles …