title: Readiness for birth; another piece of the puzzle.
authors.forename: D W
authors.initials: DW
authors.lastname: Holton
authors.forename: M
authors.initials: M
authors.lastname: Silver
mesh_terms: D000818:Animals; D005314:Embryonic and Fetal Development / Q000502:physiology*; D005260:Female; D006736:Horses / Q000196:embryology* / Q000502:physiology; D007743:Labor, Obstetric / Q000502:physiology*; D011247:Pregnancy; D011372:Progestins / Q000097:blood*
chemical_list: D011372:Progestins