Effects of Steroid Hormone Levels on the Ultrasound Appearance of the Preovulatory Endometrium in Controlled Ovarian Hyperstimulation Cycles

Abstract

Background: This study investigated the effects of serum estradiol (E2) and progesterone levels on preovulatory endometrial thickness and echogenicity in controlled ovarian hyperstimulation (COH) cycles for in vitro fertilization (IVF).