Donor age is a major determinant of success of oocyte donation/recipient programme.

Background: In recent years, particularly in developed countries, women have tended to delay childbirth until over 40 years of age. Our study aims to identify whether the donor's age or recipient's age influences the pregnancy and live birth rate following oocyte recipient cycles.

Methods: A population study included 3889 fresh oocyte recipient cycles.

Transfers of fresh blastocysts and blastocysts cultured from thawed cleavage embryos are associated with fewer miscarriages.

The literature shows an inconsistent relationship between miscarriage and assisted reproduction treatment factors. This study assessed the association between miscarriage and transfer of fresh or thawed embryos at cleavage/blastocyst stages. A population study included 52,874 pregnancies following autologous cycles.

Transfer of a selected single blastocyst optimizes the chance of a healthy term baby: a retrospective population based study in Australia 2004-2007.

Background: The practice of single embryo transfer (SET) is highly accepted by clinicians in Australia. This study investigates whether the SET of blastocysts results in optimal perinatal outcomes.

Methods: This retrospective population-based study included 34 035 single or double embryo transfer cycles in women who had their first fresh autologous treatment in Australia during 2004-2007.

Better perinatal outcomes following transfer of fresh blastocysts and blastocysts cultured from thawed cleavage embryos: a population-based study.

Background: Fresh embryo transfer results in higher live birth rates, while thawed embryo transfer appears to result in healthier babies. This study aims to investigate the association between the transfer of fresh or thawed embryos at the cleavage or blastocyst stage and the perinatal outcomes.

Methods: This analysis is a retrospective population-based study of 150 376 autologous embryo transfer cycles in Australia during 2002-2006.

Term breech singletons and caesarean section: a population study, Australia 1991-2005.

Objective: To describe the method of birth of term breech singletons in Australia.

Design, Setting And Participants: A retrospective population-based study of women who gave birth to term breech singletons in Australia between 1 January 1991 and 31 December 2005 using data from the National Perinatal Data Collection.

Main Outcome Measures: Caesarean section, vaginal breech birth.