Peripheral plasma progesterone and utero-ovarian prostaglandin F concentrations in the cow around parturition.
The concentration of prostaglandin F in utero-ovarian venous plasma and proseterone in jugular venous plasma were determined by radioimmunoassay in 3 cows over the last 2-3 weeks of gestation. Utero-ovarian prostaglandin F concentrations did not show and consistent pattern in two hours of three cows until 48-72 h before term when the levels rose sharply from 1 ng/ml to maximum 4-9 ng/ml during labour. The concentration of prosterone in jugular venous plasma tended to fall gradually over the last 20 days of gestation with a further fall occurring 48-36 h before delivery.
D000818:Animals; D000918:Antibody Specificity; D002417:Cattle; D005260:Female; D007106:Immune Sera; D007743:Labor, Obstetric; D010053:Ovary / Q000098:blood supply / Q000378:metabolism; D011247:Pregnancy; D011374:Progesterone / Q000097:blood* / Q000276:immunology / Q000378:metabolism; D011460:Prostaglandins F / Q000097:blood* / Q000276:immunology / Q000378:metabolism; D011863:Radioimmunoassay; D013997:Time Factors; D014599:Uterus / Q000098:blood supply / Q000378:metabolism
D007106:Immune Sera; D011460:Prostaglandins F; D011374:Progesterone