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.
How Does Rh Sensitising Happen During Pregnancy. During pregnancy, the motherâs and babyâs blood systems are separate. However, during pregnancy, labour or birth, a small number of red blood cells from the baby can cross the placenta and enter the motherâs blood. This can also happen if the mother experiences: 1  Amniocentesis (sampling of amniotic fluid via a needle inserted through the abdomen) 2  Chorionic villus sampling (sample from the placenta via needle inserted into the abdomen or through the cervix) 3  Any bleeding during pregnancy. 4  Any blunt trauma to the abdomen during pregnancy.