Figure 6 shows the family pattern when a hemophiliac boy is born to a mother who is not known to be a carrier. Many of these cases are the result of new mutations. This means that hemophilia can affect any family. Because sisters and mothers of hemophiliacs are not necessarily carriers, as seen in Figures 5 and 6, it is important to do hemophilia carrier testing. There are two ways to determine whether a woman is a carrier of hemophilia.
Doctors can analyze the woman s family tree.
Certain information will be revealed. If the father is a hemophiliac, the daughter will be a carrier. DNA testing is the most reliable way to detect carrier status. Blood samples must be taken not only from the potential carrier but also from key family members. Results take 10-14 days.