REPRODUCTIVE BIOMEDICINE ONLINE, vol.40, no.6, pp.812-818, 2020 (SCI-Expanded)
Research question: Does intramuscular progesterone supplementation ensure ongoing pregnancy rates (OPR) comparable with vaginal progesterone only in hormone replacement therapy cycles for vitrified-warmed embryo transfer; and is there a window of serum progesterone concentration out of which reproductive outcomes may be negatively affected?