Table 1.

Number of presumptive zygotes and embryos lacking ZP in both in vitro and in vivo conditions.

	Collected (0.5 dpc)		In vitro (4.5 dpc)		In vivo (3.5 dpc)
	No. of presumptive zygotes	No. of ZP-free presumptive zygotes (%)	No. of embryos	No. of ZP-free embryos (%)	No. of embryos	No. of ZP-free embryos (%)
Control	8.3±0.2	0.2±0.2b	7.9±0.3	0.2±0.2a	7.0±0.6	0
	(n=12)	(1.9±1.9#)	(n=12)	(3.3±3.3*)	(n=5)	(n=5)
		(n=12)		(n=12)
DM	7.0±1.3	1.7±0.7b	6.3±0.8	1.3±0.5a	3.2±1.3	1.2±0.5
	(n=6)	(30.0±12.0#)	(n=6)	(29.0±10.3*)	(n=5)	(65.0±19.0)
		(n=6)		(n=6)		(n=5)

Mean±s.e.m. Values with the same superscript are significantly different. P=0.05 (^a, *); P<0.05 (^b, ^#).