title: Determining the viability of early pregnancies: two case reports.
authors.affiliation: Northridge Family Practice Residency Program, CA 91325.
authors.forename: P M
authors.initials: PM
authors.lastname: Davis
mesh_terms: D000328:Adult; D006063:Chorionic Gonadotropin / Q000097:blood*; D018997:Chorionic Gonadotropin, beta Subunit, Human; D005260:Female; D005328:Fetal Viability; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D010446:Peptide Fragments / Q000097:blood*; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D016216:Ultrasonography, Prenatal
chemical_list: D006063:Chorionic Gonadotropin; D018997:Chorionic Gonadotropin, beta Subunit, Human; D010446:Peptide Fragments