Study Status: Completed
Recruit Status: Completed
Study Type: Interventional
Official Title: The Randomized Controlled Trial Study of Letrozole in the Prevention of Medium and Severe Ovarian Hyperstimulation Syndrome in Invitro Fertilization Treatment
Brief Summary: Letrozole is one kind of aromatase inhibitors which may have effect on decrease estrogen in luteal phase and inhibit the luteal function of ovary. In 2009, Letrozole was reported as one candidate for the treatment or prevention of ovarian hyperstimulation syndrome.