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.
1 You have to be healthy, fit, and not suffering from a current illness. Avoid donating blood if you have a cold, a cold sore, a cough, a virus, or an upset stomach. Certain prescribed medications, such as antibiotics, can make you ineligible to donate blood.  You must weigh at least 110 pounds or 50 kg.