Clinical application of preimplantation genetic diagnosis for cystic fibrosis

Cystic fibrosis (CF) is an autosomal recessive disease characterized by obstruction and chronic infections of the respiratory tract and pancreatic insufficiency. The gene was cloned in 1989 and the most frequent mutation was shown to be the ΔF508 mutation. During PGD, embryos obtained in vitro are checked for the presence or absence of the mutation, after which only embryos shown to be free of the mutation are returned to the mother. Up to 1999, 48 intracytoplasmic sperm injection (ICSI) and in vitro fertilization (IVF) cycles had been carried out for PGD for CF in 24 couples, and different diagnostic tests had been used to select non‐affected embryos. Thirteen patients became pregnant and 12 healthy babies have been born. Copyright © 2000 John Wiley & Sons, Ltd.

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