Table 1.

PCR genotyping of embryos at days 2.5 and 8.5 pc, showing the number of embryos and, in brackets, % of total

Genotype	Day 2.5	Day 8.5
+/+	3 (14%)	11 (30%)
+/−	7 (34%)	18 (49%)
−/−	4 (19%)	0
No PCR result	7 (33%)	0
Abortive implantation sites	N.R.	8 (21%)
Total no. of embryos	21	37

N.R., not relevant because embryos have not implanted at day 2.5.