title: Influence of ritodrine on plasma steroids and human placental lactogen levels in third-trimester pregnancies.
abstract: The effects of ritodrine, administered by intravenous, intramuscular or per os routes, upon plasma levels of unconjugated estriol, estradiol, progesterone and human placental lactogen (HPL) were investigated in 24 third-trimester pregnancies. Ritodrine administered at a constant rate of 200 micrograms/min for 3 h, injected intramuscularly 8 x 10 mg/day for 5 days or given orally in doses of 6 x 20 mg/day for 10 days resulted in a significant decrease in the steroid hormone concentration and a significant elevation of HPL levels.
authors.affiliation: Department of Obstetrics and Gynecology, Asaf Harofe Medical Center, Zerifin, Israel.
authors.forename: P
authors.initials: P
authors.lastname: Schreyer
authors.forename: Y
authors.initials: Y
authors.lastname: Zer
authors.forename: S
authors.initials: S
authors.lastname: Ariely
authors.forename: A
authors.initials: A
authors.lastname: Herman
authors.forename: E
authors.initials: E
authors.lastname: Caspi
mesh_terms: D000284:Administration, Oral; D000328:Adult; D004958:Estradiol / Q000097:blood*; D004964:Estriol / Q000097:blood*; D005260:Female; D006801:Humans; D007262:Infusions, Intravenous; D007273:Injections, Intramuscular; D010928:Placental Lactogen / Q000097:blood*; D011247:Pregnancy / Q000097:blood*; D011263:Pregnancy Trimester, Third; D011374:Progesterone / Q000097:blood*; D012312:Ritodrine / Q000008:administration & dosage*
chemical_list: D011374:Progesterone; D004958:Estradiol; D010928:Placental Lactogen; D004964:Estriol; D012312:Ritodrine