SHARMA, N, et al. “Changes in Milk and Plasma Progesterone and Pregnancy-Associated Glycoprotein and Their Relationships With the Foetal Number During Early Pregnancy in Jakhrana Goats”. The Indian Journal of Animal Sciences, vol. 90, no. 12, July 2021, pp. 1589-93, https://doi.org/10.56093/ijans.v90i12.113167.