1
These results support the hypothesis of lower in vitro developmental capacity for embryos collected from gilts inseminated at first oestrus.
2
Standard swine management involves ad libitum feeding of gilts at first oestrus and restricted feeding of gilts at third oestrus.
3
Comparison of treatments 1A and 3R supported the contention of increased embryo mortality in gilts inseminated at first oestrus under normal management conditions.