frequencies of the interval between
the onset of estrus and ovulation in gilts receiving or not receiving porcine
luteinizing hormone (pLH) at the onset of estrus. Gilts were submitted to
ultrasound evaluation at 12-hour intervals (50 gilts per group). control-G:
gilts did not receive pLH; FTAI-G: use of 2.5-mg pLH at the onset of estrus
administered through vulvar submucosal route. x-yBars with different letters
indicate a tendency for difference between FTAI-G and control-G groups
(P ¼ 0.07).