Low-level Progesterone on the Day of hCG Injection Has No Detrimental Effect on the Pregnancy Outcome after IVF with GnRH-a Protocol: A Retrospective Study

Abstract

In addition, animal experiments have indicated that the P level during the late follicular phase is important for the maturation of oocyte [15], fertilization of oocyte [16], and luteinization of theca / granulosa [17,18]. Additionally, P is important to support the endometrium in the luteal phase. Therefore, we suppose that low level P in the phase of late follicular may compromise pregnancy outcome after IVF cycles. Abstract