Synchronous onset of oestradiol-17β secretion by Meishan conceptuses

Table 2 Mean ± s.e.m. number of ovulations and individual embryo recoveries from Meishan gilts on days 11 to 13 after the onset of oestrus.

Day after oestrus	Ovulations per gilt^a	Number of individual conceptuses per gilt^b	Percentage conceptus recovery^b
11	18.5 ± 1.7	14.67 ± 0.99	84.4 ± 3.5
12	19.3 ± 0.8	15.2 ± 1.2	79.5 ± 7.7
13	18.2 ± 0.7	20^c	100^c
P	0.766	0.395	0.392

^a N = 6 gilts per day. ^b day 11, N = 6 gilts; day 12, N = 5 gilts; day 13, N = 1 gilt. ^c The only litter with individual conceptuses had an ovulation rate of 20.

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