ESHRE PGD Consortium data collection IX: cycles from January to December 2006 with pregnancy follow-up to October 2007

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Abstract
The ninth report of the European Society of Human Reproduction and Embryology Preimplantation Genetic Diagnosis Consortium is presented documenting cycles collected for the calendar year 2006 and follow-up of the pregnancies and babies born until October 2007, which resulted from these cycles. Since the beginning of the data collections there has been a steady increase in the number of cycles, pregnancies and babies reported annually. For data collection IX, 57 centres have participated, reporting on 5858 cycles to oocyte retrieval (OR), along with details of the follow-up on 1437 pregnancies and 1206 babies born. Eight hundred and twelve ORs were reported for chromosomal abnormalities, 133 ORs for sexing for X-linked diseases, 931 ORs for monogenic diseases, 3900 ORs for preimplantation genetic screening and 82 ORs for social sexing. Data IX are compared with the cumulative data for data collections I–VIII.