Twenty one infertile crossbred dairy cattle were divided into three groups and treated as below. The first group (5 cows) was treated with 17 B-estradiol (10 mg) and progesterone (50 mg) twice a day for 7 consecutive days. The second (5 cows) and third (11 heifers) groups received 17B- estradiol (20 mg) and progesterone (50 mg) twice a day for 3.5 consecutive days (7 doses). After steroid treatment, 5 injections of 2 mg of reserpine were given subcutaneously every second day to each of all treated animals. In response to the treatments, there were 4, 2, and 8 animals from the first, second, and third group respectively were successfully induced to lactate. Milk yields for the period of 4 months averaged 690.7 ± 117.7, 1051.2 ± 65.0, and 653.7 ± 245.7 kg from the respective groups. Comparing to the previous lactation, it was found that milk yield from this study was around 60-75 percent of the normal lactation. The butter fat content was found to be normal.
Faculty of Veterinary Science, Chulalongkorn University
Leenanuruksa, Dumrong; Chantaraprateep, Peerasak; Lohachi, Chainarong; Timpatpong, Somkiat; Prasarnpanich, Somkiat; Vittayanupabyuenyong, Kaset; and Siri, Anucha
"Project of Investigation on Infertile Dairy Cattle at DFPO, Muak-lek 1. Artificial induction of lactation,"
The Thai Journal of Veterinary Medicine: Vol. 14:
3, Article 3.
Available at: https://digital.car.chula.ac.th/tjvm/vol14/iss3/3