title: Variation of hcg and hcs (or hpl) in pregnancy.
mesh_terms: D006063:Chorionic Gonadotropin / Q000032:analysis*; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D010928:Placental Lactogen / Q000032:analysis*; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third
chemical_list: D006063:Chorionic Gonadotropin; D010928:Placental Lactogen