Table 1. In vitro and in vivo development of cynomolgus monkey embryo after lentivirus injection.

Injection timing of virus	24 h post ICSI
No. of embryos used	18
No. of 2 cell stage	18
No. of blastocyst (% per 2 cell)	5 (27.8)
ETs	5
No. of surrogates	3
No. of pregnancies at 30 days after ICSI	2
Multiple pregnancy	1 (twin)
Aborted	2*
Live birth	0

ET: embryo transfer.

^*One of the aborted foetus at 35 days after ICSI that was only placenta and the other foetus at 92 days after ICSI that was twin.