Table 2. In vitro and in vivo development of PreI embryo.

Group	PreI	Control
Injection timing of virus	4 h pre ICSI	–
No. of embryos used	69	34
No. of 2 cell stage	56	18
No. of blastocyst (% per 2 cell)	25 (44.6)	10 (55.6)
ETs	17	–
No. of surrogates	17	–
No. of pregnancies at 30 days after ICSI	5	–
Spontaneous miscarriage	3	–
Live birth	2*	–

PreI: Pre-ICSI.

ET: embryo transfer.

^*One offspring died three days after birth.