已经证实在体外受精(IVF)中使用黄体酮和人绒毛膜促性腺激素(hCG)都有利于黄体期支持。但hCG具有诱发卵巢过度刺激症的风险,使用黄体酮无此担忧,且给药方便,可以肌注、阴道用药和口服,因而黄体酮更便于医患人员接受。但黄体酮给药时机的选择、剂量的多少和给药途径仍是众多学者关注的焦点。作者对肌肉注射黄体酮时机的选 It has been demonstrated that the use of progesterone and human chorionic gonadotropin (hCG) in in vitro fertilization (IVF) both favored luteal phase support. However, hCG has the risk of ovarian hyperstimulation induced by the use of progesterone without such concerns, and convenient administration, intramuscular, vaginal and oral administration, and thus progesterone easier for medical staff to accept. However, the timing of progesterone administration, the amount of dosage and route of administration remains the focus of many scholars. The author of intramuscular injection of progesterone timing of the election