Per general etiquette, the mother of the bride buys her wedding day outfit first, then notifies the mother of the groom about the color, length and overall formality of her choice. But if the groom's mom doesn't get word by the four-month mark, she should touch base with the bride-to-be about what to do.
Genetics. The two main types of hemophilia are caused by gene mutations that affect the levels of clotting factors in the blood. Mutation of the FVIII gene leads to hemophilia A, also called classic hemophilia, while a mutations in the FIX gene leads to hemophilia B, also called Christmas disease.
There are two types of inherited hemophilia: 1  Type A, the most common type, is caused by a deficiency of factor VIII, one of the proteins that helps blood to form clots. 2  Type B hemophilia is caused by a deficiency of factor IX.emophilia is a rare hereditary (inherited) bleeding disorder in which blood cannot clot normally at the site of a wound or injury. The disorder occurs because certain blood clotting factors are missing or do not work properly. This can cause extended bleeding from a cut or wound.