Table 2

Phenotypes of day 3.5 preimplantation embryos

Developmental stage+/− × +/− +/+ × +/+ or +/− × +/+
No. of embryos (% of total)No. of embryos with micronuclei (% of total)No. of embryos (% of total)No. of embryos with micronuclei
Blastocyst88 (56.8%)4 (10.3%)48 (75%)0
Morula38 (24.5%)13 (33.3%)8 (12.5%)0
Degenerate morula26 (16.8%)22 (56.4%)00
≤16 cells2 (1.3%)03 (4.5%)0
Dead1 (0.6%)05 (8%)0
Total no. of embryos1553964
No. of litters198
Avg. no. of embryos/litter8.28.0