Age at puberty in female dwarf goat on the basis of hormones
2000
Khanum, S.A. (Nuclear Inst. for Agriculture and Biology, Faisalabad (Pakistan)) | Kausar, R. | Hussain, M. | Ali, M. | Cheema, A.M.
A lot of five healthy female Dwarf goat kids were reared at NIAB farm. Blood sampling was started at the age of 75 days. Progesterone, Oestradiol, LH and FSH values were monitored using Radioimmunoassay (RIA) during prepuberal period and oestrous cycle. During prepuberal period, progesterone remained at basal levels of 0.1-0.5 ng/ml. A small rise up to 2 pg/ml was noticed in Oestradiol at the transition from prepuberal to puberal period. Similarly, LH and PSH values were risen up to 2.9 ng/ml and 2.2 ng/ml respectively. Hormonal levels begin to rise at the age of 4- 5 months (120-160 days). FSH and Oestradiol started to increase followed by the LH peak. A decrease in the LH peak level after 24 hours followed by FSII and Oestradiol level was noticed. After oestrous phase progesterone level started to rise up to 4-9 ng/ml during the next 15 days. In the next 5 days these levels started to fall to basal values. On the day of oestrous peak values of Oestradiol. LH and FSH ranged from 10-I6 pg/ml, 13-23 and 13-22 ng/ml respectively. The overall pattern of release of all these hormones was found similar in all these four animals. So in this lot, the mean age of puberty was found to be 137 plus
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