Both blastomere lysis and cleavage affect the outcome in sFET. To avoid the risk of twins, sFET should be considered when the embryo shows less than 25% blastomere lysis and at least one blastomere cleaves.

The incidence of PCO in Australian women is similar to that of other Caucasian populations.

Objective: To review the results of opinion polls on community attitudes to in‐vitro fertilisation (IVF) and other aspects of assisted reproductive technology over a 20‐year period. Design, setting and participants: Fourteen Australia‐wide interview surveys that included questions relating to IVF were carried out between July 1981 and November 2001 as part of regular Morgan polls of community attitudes on various topics. Each survey involved about 1000 respondents drawn from randomly selected “cluster points” in urban and rural locations. Main outcome measures: The proportion of people who approved or disapproved of various aspects of IVF treatment. Results: Support for IVF to help infertile married couples increased from 77% in 1981 to 86% in 2001. Approval for IVF procedures being supported by Medicare funding rose from 70% in 1981 to 79% in 2000. Conclusions: Community approval of the use of IVF to treat infertility has risen significantly in Australia over the past 20 years.

The transition of in vitro fertilization from research to standard clinical practice has, to a great extent, been as a result of the use of controlled ovarian hyper stimulation. A disadvantage of the availability of multiple embryos has been the replacement of several embryos leading to an epidemic of multiple pregnancies. This retrospective review of 2606 fresh embryo transfers between 2001 and 2003, where either one or two selected embryos were replaced from an available cohort of at least four, shows that single embryo transfers have a similar pregnancy rate without the risk of multiple pregnancy.