PGD sex selection is uncommon and typically used for medical reasons, specifically, when couples know they are carriers for genetic conditions linked to biological sex. These X chromosome linked disorders are primarily found in males.
Outside of medical reasons, use of sex selection can be controversial. We suggest the future parents not to deliberately choose the sex of the baby but to allow it to happen randomly. Nonetheless there is the possibility to select the sex of the future child according to the wish of the parents if they agree so.