Detection of Estrus in Dairy Cows by Electrical Measurements of Vaginal Mucus and by Milk Progesterone
نویسندگان
چکیده
منابع مشابه
Detection of estrus in dairy cows by electrical measurements of vaginal mucus and by milk progesterone.
Electrical resistance (ohms) of mucus were analyzed in 20 postpartum Holstein cows by use of a probe inserted into the anterior vagina every other day for 30 days. Composite milk samples were taken on the same day, and progesterone was determined by radioimmunoassay. Cows were observed twice daily for standing estrus and reproductive organs palpated weekly per rectum (rectal palpation). Fifteen...
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ژورنال
عنوان ژورنال: Journal of Dairy Science
سال: 1976
ISSN: 0022-0302
DOI: 10.3168/jds.s0022-0302(76)84307-x