title: Episodic secretion of human chorionic gonadotropin in early pregnancy.
abstract: The serum concentration of human chorionic gonadotropin (hCG) was measured at 10- to 60-minute intervals for 4-24 hours in 5 women at 5-8 weeks of pregnancy. hCG was found to be secreted episodically with pulses observed every 2-4 hours. The episodic secretion of hCG may have important implications to our understanding of both normal and abnormal reproduction.
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood / Q000378:metabolism*; D005260:Female; D006207:Half-Life; D006801:Humans; D007700:Kinetics; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011374:Progesterone / Q000097:blood
chemical_list: D006063:Chorionic Gonadotropin; D011374:Progesterone