With PGD for aneuploidy screening, data show that miscarriage rates are lower after PGD. However, statistical data on the pregnancy and live birth rates is inconsistent.
The same applies in the case of PGD for inherited genetic diseases. For instance, if both partners (male and female) are carriers of a recessive disease such as cystic fibrosis (CF), they would have a 25% chance of having a baby with this disease. With PGD, they can have normal embryos, and therefore a healthy child.