Treasury regulations (26 C.F.R.)--commonly referred to as Federal tax regulations-- pick up where the Internal Revenue Code (IRC) leaves off by providing the official interpretation of the IRC by the U.S. Department of the Treasury.
No. Pregnant women are not eligible to donate blood according to the American Red Cross, which also advises waiting at least six weeks after giving birth. Although the amount of blood in your body increases by about 50 percent during pregnancy, you and your growing baby need it for optimum health and nutrition.
So you can get some blood into them quickly, and then take the time to type their blood, and give the matching type for later transfusions. In pregnant women, you have to worry about both the mother and the unborn child -- they can be different blood types. The universal donor O Neg type will work for both of them.