title: A modified ultra-long pituitary downregulation protocol improved endometrial receptivity and clinical outcome for infertile patients with polycystic ovarian syndrome.
abstract: There are currently various protocols for in vitro fertilization (IVF). For patients with polycystic ovarian syndrome (PCOS), an optimized protocol for the downregulation of pituitary follicle stimulating hormone and luteinizing hormone via gonadotropin-releasing hormone agonist (GnRHa) remains a challenge. In the present study, the primary endpoint of an ultra-long and a conventional long GnRHa protocol for intracytoplasmic sperm injection/IVF treatments of patients with PCOS was retrospectively compared. In the modified ultra-long protocol group, endometrial thickness, morphology, and blood flow were significantly improved, as compared with in the conventional long protocol group. Furthermore, the serum progestogen (P) concentrations and P/estrogen (E2) [(Px1,000/E2)] ratio on the day of human chorionic gonadotrophin administration were significantly decreased in the modified ultra-long downregulation group, whereas the pregnancy and implantation rates were significantly higher. There were no significant differences in the average number of obtained oocytes, good quality embryo rates, cancel rates, fertilization rates, abortion rates, serious ovarian hyperstimulation syndrome incidences, ectopic pregnancy rates or gonadotropin (Gn) dosages between the two groups. These results suggest that the modified ultra-long protocol plus human menopausal Gn medication may be superior to the conventional long protocol, and may lead to improved implantation and pregnancy outcomes for infertile patients with PCOS.
authors.affiliation: Institute of Reproductive and Stem Cell Engineering, Central South University, Changsha, Hunan 410083, P.R. China ; Department of Reproductive Medicine, Reproductive and Genetic Hospital of Citic-Xiangya, Changsha, Hunan 410078, P.R. China ; Key Laboratory of Human Stem Cell & Reproductive Engineering, Ministry of Health, Changsha, Hunan 410008, P.R. China.
authors.forename: Fei
authors.initials: F
authors.lastname: Gong
authors.affiliation: Department of Reproductive Medicine, Reproductive and Genetic Hospital of Citic-Xiangya, Changsha, Hunan 410078, P.R. China.
authors.forename: Xihong
authors.initials: X
authors.lastname: Li
authors.affiliation: Department of Reproductive Medicine, Reproductive and Genetic Hospital of Citic-Xiangya, Changsha, Hunan 410078, P.R. China.
authors.forename: Shunji
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Reproductive Medicine, Reproductive and Genetic Hospital of Citic-Xiangya, Changsha, Hunan 410078, P.R. China.
authors.forename: Hainan
authors.initials: H
authors.lastname: Ma
authors.affiliation: Department of Reproductive Medicine, Reproductive and Genetic Hospital of Citic-Xiangya, Changsha, Hunan 410078, P.R. China.
authors.forename: Sufen
authors.initials: S
authors.lastname: Cai
authors.affiliation: Department of Reproductive Medicine, Reproductive and Genetic Hospital of Citic-Xiangya, Changsha, Hunan 410078, P.R. China.
authors.forename: Juan
authors.initials: J
authors.lastname: Li
authors.affiliation: Institute of Reproductive and Stem Cell Engineering, Central South University, Changsha, Hunan 410083, P.R. China ; Department of Reproductive Medicine, Reproductive and Genetic Hospital of Citic-Xiangya, Changsha, Hunan 410078, P.R. China ; Key Laboratory of Human Stem Cell & Reproductive Engineering, Ministry of Health, Changsha, Hunan 410008, P.R. China.
authors.forename: G E
authors.initials: GE
authors.lastname: Lin
authors.affiliation: Institute of Reproductive and Stem Cell Engineering, Central South University, Changsha, Hunan 410083, P.R. China ; Department of Reproductive Medicine, Reproductive and Genetic Hospital of Citic-Xiangya, Changsha, Hunan 410078, P.R. China ; Key Laboratory of Human Stem Cell & Reproductive Engineering, Ministry of Health, Changsha, Hunan 410008, P.R. China.
authors.forename: Guangxiu
authors.initials: G
authors.lastname: Lu
keywords: endometrial receptivity; polycystic ovarian syndrome; ultra-long downregulation protocol