Abstracts Special issue on Animal Physiology 2013, vol. 2, Abstracts special issue
Radovan Tomášek, Miroslava Škarková, Petr Řezáč
Biotechnology of Biotechnology
The aim of the study was to examine the development of preovulatory follicles in pregnant and non-pregnant high yielding cows. The treatment by supergestran and oestrophan was used to synchronize the estrous cycle. Ovaries were monitored by transrectal ultrasonography. The linear increase of preovulatory follicles was observed in pregnant (P < 0,001) and non-pregnant (P < 0,001) cows during 8 days before ovulation. In conclusion, preovulatory follicles in pregnant and non-pregnant high yielding cows developed similarly.