At what approximate day can placentomes be palpated in cows?

Placentomes, which are structures that develop from the placenta and the uterus in ruminants, can typically be palpated by the end of the first trimester of gestation. The correct timeframe for being able to identify these structures via rectal examination in cows is around 65-70 days post-conception. This corresponds with the development of the placentomes, as they become more prominent and easier to detect at this stage.

Before this period, while early embryonic structures are present, they are not as well formed, making it difficult to palpate placentomes reliably. After 70 days, the structures continue to grow and become even more pronounced, but the optimal timeframe for palpation primarily lies within the 65-70 day window, marking it as a critical period for veterinarians assessing pregnancy in cows.