Better perinatal outcomes following transfer of fresh blastocysts and blastocysts cultured from thawed cleavage embryos: a population-based study -- Wang et al., 10.1093 humrep deq067 -- Human Reproduction

The Author 2010. Published by Oxford University Press on behalf of the European Sovereign state of Human Reproduction and Embryology. All rights reserved.

For Permissions, please email: journals.permissions oxfordjournals.org In a superior way perinatal outcomes consequent transfer of advanced blastocysts and blastocysts cultured from thawed cleavage embryos: a population-based scan Yueping Alex Wang 1, , Michael Chapman 2, Michael Costello 2 and Elizabeth Anne Sullivan 1 1 Perinatal and Reproductive Epidemiology Check Unit, Institution Women's and Children's Health, the University of Virgin South Wales, Common 2, McNevin Dickson Building, Randwick Hospitals Campus, Randwick, NSW 2031, Australia 2 Institute of Women's and Children's Health, the University of Recent South Wales, Regal Infirmary for Women, Randwick Hospitals Campus, Randwick, NSW 2031, Australia Packages addresses.

Tel: +61-612-9382-1014; Fax: +61-612-9382-1025; E-mail: alex.wang at unsw.edu.au BACKGROUND: New embryo transfer results in higher vital birth rates, while thawed embryo transfer appears to consummation in healthier babies. This glance at aims to investigate the society between the transfer of virgin or thawed embryos at the cleavage or blastocyst episode and the perinatal outcomes.

METHODS: This dialogue is a retrospective population-based glance at of 150 376 autologous embryo transfer cycles in Australia during 2002-2006.

The rates of pregnancy, alive delivery and "healthy baby" delivery (a unmarried child born animate at term, weighing 2500 g, surviving for at least 28 days announce birth and not having congenital anomalies) were compared after transfer of recent cleavage embryos, contemporary blastocysts, thawed cleavage embryos, blastocysts from thawed cleavage embryos and thawed blastocysts.

RESULTS: The living delivery percentage was significantly higher for transfer of original blastocysts (27.9%) than for blastocysts cultured from thawed cleavage embryos (22.0%), modern cleavage embryos (21.7%), thawed blastocysts (16.3%) and thawed cleavage embryos (15.2%).

Compared with the transfer of latest blastocysts, the likelihood of a "healthy baby" was significantly lower for blastocysts from thawed cleavage embryos adjusted odds ratios (AOR) 0.73, 95% confidence intervals (CI) 0.65-0.82, fresh cleavage embryos (AOR 0.67, 95% CI 0.64-0.69), thawed blastocysts (AOR 0.57, 95% CI 0.53-0.62) and thawed cleavage embryos (AOR 0.53, 95% CI 0.51-0.56).

Of thaw cycles, transfers of thawed blastocysts (AOR 0.79, 95% CI 0.70-0.89) and thawed cleavage embryos (AOR 0.71, 95% CI 0.63-0.79) had significantly lower odds of "healthy baby" than transfer of blastocysts from thawed cleavage embryos.

CONCLUSIONS: These material propose that an optimum knowledge imitation to maximize the outcomes of the birth of a "healthy baby" is the transfer of blastocysts and the very cold of cleavage embryos in fresh cycles and subsequent transfer of blastocysts cultured from these thawed cleavage embryos. Clue words: embryo advance fresh thawed embryo pregnancy aware delivery perinatal outcome Submitted on Sept 30, 2009; resubmitted on Feb 22, 2010; habitual on February 23, 2010.

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