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.

Child's gender and menstrual cycle calculator

What days is the best chance of fertilization?
How to influence the gender of the child?
How to increase the chance for a son or a daughter?
How to naturally ‘protect’ yourself against pregnancy?

Menstrual cycle settings
The first day of the last bleeding
The length of the cycle
Which day are you ovulating?	leave empty if you do not know
Your wish	child boy girl contraception

Child's blood type and genetic traits calculator

What blood type can your child have?
Are you at risk of a serological conflict?
What eye color can your child have?

Father
Blood type	0 A B AB
Rh factor	Rh+ Rh-
Eye color	blue brown green
Mother
Blood type	0 A B AB
Rh factor	Rh+ Rh-
Eye color	blue brown green