ABSTRACT
If a couple undergoing the costly and traumatic experience of in vitro fertilisation (IVF) is to be given the best chance of achieving their much wanted pregnancy, it is likely that the number of eggs recovered and exposed to sperm will exceed the number of embryos that should be replaced in the woman’s uterus. Where a regulatory system is in place, an upper limit of three embryos to be replaced is usually set. Centres with a high success rate often replace only two, especially where the woman is young and does not herself have a fertility problem.
