title: Absent or delayed preovulatory luteinizing hormone surge in experimental diabetes mellitus.
abstract: The proestrus preovulatory luteinizing hormone (LH) surge was absent or delayed in more than 56% of untreated streptozotocin-diabetic rats. Absence of LH surge was associated with anovulation. Insulin treatment for 10-14 days restored the diminished surge and ovulation frequency. Pituitary LH release in response to exogenous gonadotropin-releasing hormone administration in diabetic rats was not different from controls. Impaired hypothalamic function may comprise the basis for the increased incidence of infertility in diabetes mellitus.
mesh_terms: D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D001835:Body Weight / Q000187:drug effects; D003921:Diabetes Mellitus, Experimental / Q000503:physiopathology*; D004971:Estrus / Q000187:drug effects; D005260:Female; D005508:Food Deprivation; D007030:Hypothalamo-Hypophyseal System / Q000503:physiopathology; D007328:Insulin / Q000494:pharmacology; D007986:Luteinizing Hormone / Q000097:blood*; D010060:Ovulation / Q000187:drug effects; D010906:Pituitary Hormone-Releasing Hormones / Q000494:pharmacology; D011247:Pregnancy; D011359:Proestrus / Q000187:drug effects; D051381:Rats; D011919:Rats, Inbred Strains
chemical_list: D001786:Blood Glucose; D007328:Insulin; D010906:Pituitary Hormone-Releasing Hormones; D007986:Luteinizing Hormone