Tincture of cannabis. Tincture of cannabis, sometimes known as green dragon, is an alcoholic extract of cannabis. Cannabis tinctures are used in the production of specific extracts, like Nabiximols. Contents.
The Rh factor test is done during pregnancy to identify a woman's Rh factor. In some cases, the baby's father might need an Rh factor test, too. During pregnancy, problems can occur if you're Rh negative and the baby you're carrying is Rh positive. Usually, your blood does not mix with your baby's blood during pregnancy.
Rh type is needed during pregnancy to assess the risk of hemolytic disease of the newborn (HDN). In this condition, fetal red blood cells are destroyed by antibodies that are formed in the pregnant woman and that cross the placenta and into the fetal blood.