title: Improvement of early pregnancy diagnosis based on milk progesterone by the use of progestin-impregnated vaginal sponges.
abstract: Progestin-impregnated (250 mg medroxyprogesterone) vaginal sponges (PIVS) were inserted 6-7 days post-insemination and removed on the 17th day. Pregnancy was determined by milk progesterone on the 21-24 day post-insemination. It was found that in 52 cows which did not receive PIVS, the rate of false diagnosis of pregnancy was 21%. In 30 cows treated with PIVS, there were no false positives. The diagnosis of non-pregnant was completely accurate in both groups.
authors.affiliation: Department of Hormone Research, Haklait, P. O. Box 12, Beit Dagan, Israel.
authors.forename: M
authors.initials: M
authors.lastname: Shemesh
authors.forename: N
authors.initials: N
authors.lastname: Ayalon
authors.forename: S
authors.initials: S
authors.lastname: Marcus
authors.forename: Y
authors.initials: Y
authors.lastname: Danielli
authors.forename: L
authors.initials: L
authors.lastname: Shore
authors.forename: S
authors.initials: S
authors.lastname: Lavi