showed a trendp = 0.06
Conversely, PRL levels were significantly lower in pregnant cows than in non-pregnant cows at PGF 2α injection (p = 0.01), TAI (p = 0.01), and day 7 post-TAI (p = 0.01) and showed a trend toward lower levels (p = 0.06) on day 14 post-TAI.