For citations:

Shiryaev G.V., Prituzhalova A.O., Nikitin G.S., Shiryaeva N.A., Larkina T.A. The concentration of kisspeptin, 17β-estradiol, progesterone and cortisol in the first trimester of pregnancy in cows. International Journal of Veterinary Medicine. 2023;(3):251-257. (In Russ.) https://doi.org/10.52419/issn2072-2419.2023.3.251