title: Induction of the endogenous gonadotrophin surge for oocyte maturation with intra-nasal gonadotrophin-releasing hormone analogue (buserelin): effective minimal dose.
abstract: From 1985-1987, a total of 34 couples undergoing superovulation for a single in-vitro fertilization (IVF) cycle with clomiphene citrate and purified follicle stimulating hormone (FSH) or human menopausal gonadotrophin (HMG) were randomly allocated doses of intra-nasal buserelin to induce an endogenous gonadotrophin surge, prior to oocyte collection. The doses ranged from a single 25 microg dose to 100 microg every 4 h for 20 h. In three cycles the treatment was abandoned because of a poor ovarian response. In the remaining 31 cycles buserelin was given to induce the endogenous gonadotrophin surge, but there was evidence of premature luteinization in eight cycles and a premature gonadotrophin surge in four cycles. Although a single dose as low as 40 microg induced a surge and resulted in a pregnancy, a single dose of 50 microg proved the most effective minimal dose consistently to induce a gonadotrophin surge and oocyte maturation. Recent reports using gonadotrophin-releasing hormone (GnRH) analogues to induce a gonadotrophin surge has prompted publication of this previously unpublished data.
authors.affiliation: McGill University Reproductive Centre, Royal Victoria Hospital, Montreal, Quebec, Canada.
authors.forename: W M
authors.initials: WM
authors.lastname: Buckett
authors.forename: B
authors.initials: B
authors.lastname: Bentick
authors.forename: R W
authors.initials: RW
authors.lastname: Shaw
mesh_terms: D000281:Administration, Intranasal; D000328:Adult; D002064:Buserelin / Q000008:administration & dosage* / Q000627:therapeutic use; D016922:Cellular Senescence / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D005640:Follicle Stimulating Hormone / Q000097:blood; D007987:Gonadotropin-Releasing Hormone / Q000031:analogs & derivatives*; D006062:Gonadotropins / Q000378:metabolism*; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood; D009865:Oocytes / Q000502:physiology*; D011247:Pregnancy; D013048:Specimen Handling
chemical_list: D006062:Gonadotropins; D007987:Gonadotropin-Releasing Hormone; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D002064:Buserelin