Pregnancy rates after preimplantation diagnosis in 43 European centres related to type of genetic condition

Condition	No of pregnancies/oocyte retrieved (%)	No of pregnancies/embryos transferred (%)
Chromosomal rearrangements*	62/404 (15)	62/234 (26)
Autosomal dominant disorders†	88/517 (17)	88/385 (23)
Sex linked disorders‡	120/635 (19)	120/483 (25)
Autosomal recessive disorders§	161/669 (24)	161/561 (29)

*Reciprocal and robertsonian translocations.

†Myotonic dystrophy, amyloid polyneuropathy, adenomatous polyposis coli, Charcot Marie Tooth disease, achondroplasia, Marfan syndrome.

‡Duchenne muscular dystrophy, haemophilia, fragile X syndrome, etc.

§Cystic fibrosis, β thalassaemia, sickle cell anaemia, spinal muscular atrophy.