ABSTRACT STUDY QUESTION What is the optimal endometrial preparation protocol for a
frozen embryo transfer (FET)? SUMMARY ANSWER Although the optimal endometrial …

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 Are live birth rates (LBRs) after artificial cycle frozen-thawed embryo
transfer (AC-FET) non-inferior to LBRs after modified natural cycle frozen-thawed embryo …

Over the last decade the use of frozen–thawed embryo transfer has substantially increased,
and currently up to one in two embryos transferred has been cryopreserved. To support …

Over the past decade, the application of frozen-thawed embryo transfer treatment cycles has
increased substantially. Hormone replacement therapy and the natural cycle are two …

Background In a true-natural cycle (t-NC), optimal progesterone (P4) output from the corpus
luteum is crucial for establishing and maintaining an intrauterine pregnancy. In a previous …

Background The effect of progesterone elevation (PE) on the day of human chorionic
gonadotropin (hCG) administration on the pregnancy outcomes of in vitro fertilization …

STUDY QUESTION Is natural cycle frozen–thawed embryo transfer (NC-FET) associated
with better clinical pregnancy rates (CPR) when compared to modified natural cycle frozen …

Recent studies suggest that elevated late follicular phase progesterone concentrations after
ovarian stimulation for IVF may result in embryo–endometrial asynchrony, reducing the …

Objective: To evaluate the maternal and neonatal complications after frozen-thawed
blastocyst transfer cycles utilizing different endometrial preparation regimens. Design: This …