Table 1. Genotypes of Nczf mutant mice.

	WT	HT	KO	Total
3wks	63	121	0	184
E14.5	26	50	0	76
E10.5	14	28	0	42
E9.5	22	48	5*	75
E8.5	26	55	4	85
E6.5	23	45	16	84

Mice or embryos from Nczf heterozygous intercrosses were genotyped by PCR.

*Some E9.5 Nczf KO embryos were almost absorbed.