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 …

Research question The main objective of the study is to define the optimal trade-off
progesterone (P4) values on the day of embryo transfer (ET), to identify low P4-human …

Objective To study whether midluteal serum estradiol (E2) levels are associated with the live
birth rate in hormone replacement therapy frozen embryo transfer (HRT-FET) cycles in …

Purpose Vaginal progesterone (VP) alone has been used as luteal support (LS) in HRT‐FET
cycles without measuring serum progesterone concentrations (SPC) because it can achieve …

In the last decades we have experienced, a worldwide steep increment on the demand of
assisted reproductive treatments (ART). Therefore, the necessity to improve the performance …

Purpose: Adding dydrogesterone (DYD) to vaginal micronized progesterone (VMP) and
postponing embryo transfer in order to improve outcomes in patients with low progesterone …

The individualization of luteal phase support (LPS) in assisted reproduction techniques
(ART) has gained great attention over the past years. In contrast to artificial cycles, in which …

[spa] La fecundación in vitro es una de las técnicas de reproducción humana asistida más
frecuentemente empleada, con cifras de éxito expresadas en tasas de gestación por …

BACKGROUND: In intracytoplasmic sperm injection (ICSI) infertility treatment cycles,
measuring serum Progesterone level at day 9 after oocyte retrieval could be used as a …

ABSTRACT Introduction: Around 20-25% of pregnant women experience vaginal bleeding
in the first 20 weeks, with about 50% leading to miscarriage. Progesterone, a key pregnancy …