This study will assess the convenience of the natural proliferative phase frozen embryo transfer (NPP-FET) in terms of number of number of appointments needed before cycle scheduling.
Endometrial thickness ≥ 7 mm on the day of starting progesterone-based luteal phase support (LPS)
Serum progesterone levels <1.5 ng/ml on the day of starting progesterone-based LPS
LPS with micronized progesterone 400mg b.i.d.
Regular cycles (>24 days, ≤ 38 days)
Use of exogenous ovarian stimulation during FET
Untreated hydrosalpinx, polyp, submucous myomas or severe adenomyosis
Recurrent pregnancy loss (≥ 3 previous pregnancy losses)
Recurrent implantation failure with embryos from oocyte donation (≥ 3 previous failed embryo transfers)
Instituto Valenciano de Infertilidade de Lisboa
Lead sponsor
Gedeon Richter Ltd.
Collaborator