Improvement of early pregnancy diagnosis based on milk progesterone by the use of progestin-impregnated vaginal sponges.
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.
Shemesh
M
M
Department of Hormone Research, Haklait, P. O. Box 12, Beit Dagan, Israel.
Ayalon
N
N
Marcus
S
S
Danielli
Y
Y
Shore
L
L
Lavi
S
S