PGD stands for Pre-implantation Genetic Diagnosis also known as embryo screening. PGD was created to prevent diseases that could occur to babies later in life. Recently it has been identified that it could eventually give you the chance to choose the characteristics of your baby, such as: superior intelligence, athletic ability, improved height, etc. PGD can be good for your baby if you come from a family history of diseases that could potentially effect your baby. Doctors are certain that they can give you whatever gender you want but these characteristics are more difficult to predict even though that is not the main purpose of PGD. PGD is a very expensive procedure and is not effective for all races and ethnicities.