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  • Title: [Preimplantation genetic diagnosis (PGD): the Erasme Hospital experience].
    Author: Gonzalez-Merino E, Emiliani S, Pichon B, Parma J, Vannin AS, Delbaere A, Vassart G, Abramowicz M, Englert Y.
    Journal: Rev Med Brux; 2008; 29(6):527-34. PubMed ID: 19202707.
    Abstract:
    The clinical activity of the preimplantation genetic diagnosis (PGD) at Erasme Hospital was carried out since September 1999 for a 47,XYY patient. Up to 31 December 2007, 79 PGD cycles were carried out (45 couples) for either chromosomal structural abnormalities (robertsonian and reciprocal translocations, pericentric inversion, deletion) (n = 41), chromosomal numerical abnormalities (47,XXY, 47,XYY, 45,X/46,XX) (n = 10), aneuploidy screening for recurrent miscarriages or multiple in vitro fertilization failures (n = 10), autosomal recessive diseases (cystic fibrosis and sickle cell anaemia) (n = 12) or X-linked disorders (n = 6). A total of 475 embryos were biopsied for genetic analysis. Unaffected embryos were transferred in 58 cycles, resulting in 22 pregnancies, including fifteen clinical pregnancies. Up to now, 9 babies were born and 3 pregnancies are still ongoing. After a learning curve, our current PGD efficiency shows a total pregnancy rate per transfer of 60.0% and an implantation rate of 28.6%. Each PGD result was confirmed by prenatal or postnatal diagnosis. Our data demonstrate that PGD is a valid technique to allow couples at high risk of transmitting a genetic abnormality to increase their chances of a healthy pregnancy, but considering its complexity, patients must be counselled and selected rigorously.
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