title: Plasma gonadotropin-releasing hormone profiles after intravenous and subcutaneous bolus injection in thin and obese women.
abstract: Other studies of plasma gonadotropin-releasing hormone profiles after bolus injection have revealed earlier, sharper peaks and higher blood gonadotropin-releasing hormone levels with the intravenous (IV) than with the subcutaneous route of administration. We used both routes to administer gonadotropin-releasing hormone by bolus injection to thin and obese subjects. Plasma gonadotropin-releasing hormone profiles after IV administration were similar in both groups. The subcutaneous route produced flatter, delayed, and lower peaks, an effect markedly exaggerated in obese subjects, who demonstrated 95% lower peak gonadotropin-releasing hormone levels compared with the IV route and 64% lower levels than thin subjects after subcutaneous administration. These findings may be relevant to therapeutic failures observed in obese subjects using the subcutaneous route.
mesh_terms: D000328:Adult; D004958:Estradiol / Q000097:blood; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D012739:Gonadal Steroid Hormones / Q000097:blood*; D006065:Gonadotropins, Pituitary / Q000097:blood*; D006801:Humans; D007275:Injections, Intravenous; D007279:Injections, Subcutaneous; D007986:Luteinizing Hormone / Q000097:blood; D009765:Obesity / Q000097:blood*; D010906:Pituitary Hormone-Releasing Hormones / Q000008:administration & dosage* / Q000494:pharmacology; D011374:Progesterone / Q000097:blood; D011388:Prolactin / Q000097:blood; D013739:Testosterone / Q000097:blood; D013851:Thinness / Q000097:blood*
chemical_list: D012739:Gonadal Steroid Hormones; D006065:Gonadotropins, Pituitary; D010906:Pituitary Hormone-Releasing Hormones; D013739:Testosterone; D011374:Progesterone; D004958:Estradiol; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone