ClientFAQ donor spermThe sperm donors at CryosIs blood type important for my choice of sperm donor?
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Is blood type important for my choice of sperm donor?

All sperm donors are thoroughly screened before being accepted as donors. During the screening procedure, we test their blood type according to the AB0-system (A, B, AB or 0), and the Rhesus-system (-/+). The blood type rarely has relevance for the choice of donor, just as it is rare to consider the blood type important when finding a partner under natural conditions.

The blood type is important if the woman’s blood type is Rhesus negative (expressed Rh-) and if the donor is Rhesus positive (Rh+). In this case, there is a 50% chance that the child will get the blood type Rh+ and thereby a risk that the mother will develop antibodies against the child. This is normally not a problem in the first pregnancy, but the following pregnancies should be monitored carefully. Another reason for choosing a particular sperm donor because of his blood type is security. Some may feel more connected to a donor with a similar blood type as themselves.

Read more about our sperm donor screening here.

Types of sperm donors available

At Cryos, we have a lot of different sperm donors available, and you should be able to find a donor with the blood type and Donor Profile you prefer. In our Sperm Donor Search, you can filter between Basic and Extended Sperm Donor Profiles, where the donor’s blood type is visible in both types of donor profiles.

Can you predict the blood type of the baby?

It is not possible to precisely predict the blood type of your baby, but there are some possibilities you can exclude based on the blood type of you and your donor. Blood type is determined by the genes inherited from the biological parents. Each parent passes down one gene, and the child’s blood type is a combination of these. There are three main blood type genes: A, B, and O.

Genes A and B are dominant, which means they will always be expressed if present. Gene O is recessive, meaning it will only be expressed if there are no dominant A or B genes present. If a person has two O genes (one from each parent), they will have type O blood.