TABLE 7.

Distribution of pregnancy results after different time intervals between insemination and vitrification.

	Pregnancy after ET after 2PN vitrification-warming n = 182 (38.9%)	No pregnancy after ET after 2PN vitrification-warming n = 286 (61.1%)
Group A (n = 130)	n = 40 (30.80%)	n = 90 (69.20%)
Group B (n = 281)	n = 115 (40.90%)	n = 166 (59.10%)
Group C (n = 57)	n = 27 (47.40%)	n = 30 (52.60%)

ET, embryo transfer.

Group A: Vitrification time 17:00–18:00 hpi, B: Vitrification time 18:01–19:00 hpi, C: Vitrification time 19:01–21:00 hpi.