Astonishing fertility from a single oocyte recovery Samuel F.Marcus1, Nisrin K.Marcus and

'To whom correspondence should be addressed A 36 year old patient underwent in-vitro fertilization (IVF) and embryo transfer. Three embryos were transferred to her uterus and eight spare embryos were cryopreserved. The patient conceived a quadruplet pregnancy and delivered two boys and two identical twin girls by Caesarean section at 30 weeks gestation. The couple subsequently donated their cryopreserved embryos to the embryo dona-tion programme for the use of other couples. Two agonadal patients received these cryopreserved-thawed embryos, each in a hormone replacement cycle. Both conceived, one has safely delivered twins and the other conceived a twin pregnancy, one of the fetuses has vanished and the otter is progressing normally. The overall embryo implantation rate was seven out of nine (78%). Key words: agonadal/cryopreservation/embryo donation/TV