What is Premarital Screening?
Premarital screening comprises a few tests that are performed before marriage to prevent the transmission of diseases from one partner to the other and to provide them with options to plan for a healthy family.
It includes the following tests:
- Blood group: This test checks what your blood type is. Blood groups depend on the type of protein, called an antigen, present on your red blood cells. It is passed down to you from your parents. There are four major blood types - A, B, O, AB. However, a blood group test also determines the presence of a substance called Rh factor on your RBCs. Testing the Rh factor is important as Rh type plays an essential role during pregnancy. If the father is Rh-positive and the mother is Rh-negative, the mother will need special treatment so her body does not make antibodies (proteins produced by the immune system to fight harmful substances) against the fetal blood - this would happen if the fetus is Rh-positive. In most cases, the firstborn is not harmed as the mother does not produce enough of the harmful substances. However, with subsequent pregnancies, the risk to the unborn baby increases. Read more: Blood group test
- Venereal Disease Research Laboratory (VDRL) test: The VDRL test is a screening test for the diagnosis of syphilis. It checks for the presence of antibodies in the blood against the syphilis-causing bacteria, Treponema pallidum.
- Hepatitis B surface antigen (HBsAg) test: Hepatitis B is a liver infection caused by the hepatitis B virus (HBV). It can be transmitted through the blood, vaginal fluid and seminal fluid. The HBsAg test is a blood test that checks for the hepatitis B surface antigens (proteins present on the surface of the hepatitis B virus). In a newborn with hepatitis B infection could damage the liver, which may lead to liver cancer.
- HIV-1 and HIV-2 test: It is a blood test that is performed to check if you have a human immunodeficiency virus (HIV) infection. HIV virus attacks and weakens the immune system making one prone to infections. This test checks for both HIV antigens (part of the virus against which antibodies are formed) and antibodies. Sexual contact can spread HIV.
- Haemoglobin electrophoresis test: Haemoglobin is the chemical present in the red blood cells that transport oxygen to the body. The common types of haemoglobin present in adults are haemoglobin A and haemoglobin A2. Haemoglobin F is present in newborn and foetal blood. In addition, there are more than 350 varieties of abnormal haemoglobin - some of the common types are haemoglobin S and haemoglobin C. Electrophoresis is a method that is used to separate the normal and abnormal types of haemoglobin. The presence of abnormal haemoglobin or an abnormal amount of normal haemoglobin in blood can indicate the presence of a disease. For example haemoglobin S is present in sickle-cell anaemia.