Table 2. Characteristics of autologous and heterologous MZ gestations after single or double embryo transfer.
1 ET 2 ET
AT 1 GS
(n=3)*
2 GS
(n=9)**
3 GS
(n=0)
1 GS
(n=2)
2 GS
(n=1)
3 GS
(n=3)
HB BB Sex
♀♂
HB BB Sex
♀♂
HB BB Sex
♀♂
HB BB Sex
♀♂
HB BB Sex
♀♂
HB BB Sex
♀♂
7 7 0 7 18 11 7 4 - - - - 4 2 2 0 3 3 1 2 9 4 0 4
HT 1 GS
(n=0)
2 GS
(n=2)
3 GS
(n=1)
HB BB Sex
♀♂
HB BB Sex
♀♂
HB BB Sex
♀♂
- - - - 4 2 2 0 3 3 0 3

Legend: ET - embryo transferred; GS - gestational sac; HB - heartbeat; BB - baby born; Sex - baby sex; AT - autologous
cycles; HT - heterologous cycles.* 2 x 2 fetuses/GS and 1 x 3 fetuses/GS.**4 x 2GS /0 BB; 5 x 2 GS/2BB; 1 x 2 GS/1BB.