While the advantages include mitigation of risks such as miscarriage, genetic disorders, and others, it is difficult to ascertain the possibilities of having a baby with PGD. PGD is employed more for the purpose of understanding and avoiding genetic disorders in the offspring rather than as a tool of fertility and conception. Like all procedures related to fertility there are various factors that ascertain the success or failure of the same. These include age, physical health, underlying fertility & genetic conditions, amongst others.