Child's gender, blood type and genetic traits calculator
The child's gender and the menstrual cycle calculator may help to increase your chances for a son or a daughter. It can also be a help with natural contraception. There is no guarantee for a specific gender of the child. No form of contraception gives 100% certainty.
The blood group and genetic traits calculator is based on modern knowledge of genetics. It presents the potential blood types and eye colors of your offspring.