title: Occurrence of a spontaneous luteinizing hormone surge in superovulated cycles--predictive value of serum progesterone.
abstract: A preovulatory increase in serum progesterone (P) precedes the occurrence of an endogenous luteinizing hormone (LH) surge in a majority of women. This study evaluates whether a single daily measurement of serum P could reliably identify a spontaneous LH surge in women undergoing controlled ovarian hyperstimulation. Eighty-four infertile women received either clomiphene citrate and human menopausal gonadotropin (hMG), or hMG alone. Serum P levels were increased significantly the morning of the day of an endogenous LH surge (P less than 0.01). A 2-fold rise in the serum P levels was associated with a predictability of 64.4% of a LH surge; however, a 4-fold increase in serum P could accurately predict a spontaneous endogenous LH discharge in 93.3% (P less than 0.001) of cases.
mesh_terms: D006063:Chorionic Gonadotropin / Q000627:therapeutic use; D002996:Clomiphene / Q000627:therapeutic use; D004624:Embryo Transfer; D004958:Estradiol / Q000097:blood; D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D007247:Infertility, Female / Q000503:physiopathology; D007986:Luteinizing Hormone / Q000378:metabolism*; D008596:Menotropins / Q000627:therapeutic use; D010060:Ovulation; D011247:Pregnancy; D011374:Progesterone / Q000097:blood*; D011379:Prognosis; D013480:Superovulation
chemical_list: D006063:Chorionic Gonadotropin; D002996:Clomiphene; D011374:Progesterone; D004958:Estradiol; D008596:Menotropins; D007986:Luteinizing Hormone