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 Often the Test Is Done During Your Pregnancy. You'll get a blood test during your first prenatal visit. In your second trimester, you will get a blood test to check for diabetes and recheck your hemoglobin. If you are Rh negative, your antibodies will be rechecked. You may get other blood tests, depending on your preferences and health.