title: Viable term pregnancy despite "subluteal" serum progesterone levels in the first trimester.
abstract: This is a report of a 34-year-old patient with a 3-year history of unexplained infertility, who conceived after IVF-ET. Her serum P levels were < 2.0 ng/mL (conversion factor to SI unit, 3.180) between 5 and 6 weeks of gestation. She subsequently delivered a viable infant at term.
authors.affiliation: Department of Obstetrics and Gynecology, Cornell University Medical College, New York, New York 10021.
authors.forename: K M
authors.initials: KM
authors.lastname: Sultan
authors.forename: O K
authors.initials: OK
authors.lastname: Davis
authors.forename: H C
authors.initials: HC
authors.lastname: Liu
authors.forename: Z
authors.initials: Z
authors.lastname: Rosenwaks
mesh_terms: D000328:Adult; D000858:Anovulation / Q000097:blood*; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro; D005328:Fetal Viability; D006801:Humans; D007247:Infertility, Female / Q000628:therapy; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011374:Progesterone / Q000097:blood*
chemical_list: D011374:Progesterone