title: Concentrations of progesterone, 17 alpha-hydroxyprogesterone and 20 alpha-dihydroprogesterone in the plasma of mares during pregnancy and at parturition.
abstract: Plasma concentrations of progesterone and 17 alpha-hydroxyprogesterone were high in the 2nd and 3rd months of gestation, but 20 alpha-dihydroprogesterone increased from a level of 2 ng/ml, during the first 3 months, to 10-15 ng/ml during months 5-10, to reach 80-120 ng/ml during the last 30 days before foaling.
mesh_terms: D004092:20-alpha-Dihydroprogesterone / Q000097:blood; D000818:Animals; D005260:Female; D006736:Horses / Q000097:blood*; D006908:Hydroxyprogesterones / Q000097:blood*; D007743:Labor, Obstetric; D011247:Pregnancy; D011270:Pregnancy, Animal; D011374:Progesterone / Q000097:blood*; D013997:Time Factors
chemical_list: D006908:Hydroxyprogesterones; D004092:20-alpha-Dihydroprogesterone; D011374:Progesterone