Controlled ovarian hyperstimulation regimens: a review of the available evidence for clinical practice. Produced on behalf of the BFS Policy and Practice Committee

AbstractBefore planning an assisted conception treatment cycle, a thorough assessment of the woman's hormone profile and ovarian reserve is essential to aid the decision on the appropriate protocol for controlled ovarian hyperstimulation (COH). There is insufficient evidence to recommend the use of one type of gonadotrophins over another. There is no benefit of luteinising hormone (LH) supplementation in cycles stimulated with follicle stimulating hormone alone in an unselected population. There is some evidence to suggest a potential benefit of LH supplementation in patients with a history of poor ovarian response to stimulation and in those older than 35 years. The long gonadotrophin releasing hormone (GnRH) agonist protocol is the most widely used and is the preferred protocol in the unselected population of women undergoing COH for in vitro fertilisation or intra-cytoplasmic sperm injection. The GnRH antagonist protocol is best used for known or suspected high responders, including women with PCOS, as...