When a couple decides to conceive, many emotions, hopes and expectations are involved. For most of the future parents, the gender of the child is the least significant concern. All the parents hope is for a healthy child. In the minority of the cases, for various reasons, there is a preferred particular sex. The parents may want to reduce sex-linked and sex-limited disease risk for their future children or to balance the sex ratio among their children. Preconception sex selection for non-medical reasons raises serious moral, legal and social issues. The main concern relies on the assumption that a freely available service for sex selection will distort the natural sex ratio and lead to a severe gender imbalance.