BACKGROUNDS: Abnormal cleavage (ABNCL) in early human embryos is a frequent phenomenon associated with impaired developmental competence and reduced reproductive potential. However, the clinical determinants of ABNCL and its subtypes remain…
BACKGROUND: Endometrial receptivity in hormone replacement therapy-frozen embryo transfer (HRT-FET) cycles depends on a precisely coordinated estradiol-progesterone environment. An imbalance between estradiol (E2) and progesterone (P) befor…
OBJECTIVE: The objective of this retrospective cohort study is to investigate the impact of monitoring serum estradiol (E2) levels before progesterone administration within hormone replacement therapy (HRT) on pregnancy outcomes in women un…
BACKGROUND: The aim of this study was to explore the risk factors for early spontaneous abortion (ESA) in fresh- and frozen-embryo transfers. METHODS: This retrospective cohort study comprised a total of 35,076 patients, including 15,557 w…