Can a blood test detect pregnancy?

Blood test is a very important comprehensive diagnostic method in modern medicine, because most diseases are infected through the blood. If there is a disease in the body, there will be traces in the blood. The scope of blood tests is very wide. A simple blood test is enough to detect physical abnormalities. For example, can a blood test detect pregnancy? Let’s take a look at the explanation below.

Routine blood test is the most common and basic blood test. Blood is composed of two major parts: liquid and visible cells. Routine blood tests examine the cellular part of blood. Blood has three types of cells with different functions - red blood cells (commonly known as red blood cells), white blood cells (commonly known as white blood cells), and platelets. Determine the disease by observing changes in quantity and morphological distribution. It is one of the commonly used auxiliary examination methods for doctors to diagnose diseases.

Generally, a routine blood test only tests the red blood cells, white blood cells, and hemoglobin, etc., and cannot detect whether you are pregnant. If you want to test for pregnancy, you need to test the human chorionic gonadotropin and progesterone levels in the blood to determine whether you are pregnant.

The hCG test is done by drawing blood from a vein. Since the hCG content is not affected by eating, there is no need to fast or hold urine. It is recommended to check in the morning. Currently, the following three measurement methods are commonly used in clinical practice: enzyme-linked immunosorbent assay (ELISA) screening method, sandwich enzyme immunoassay method, and immune colloidal gold method. These methods have good sensitivity, low cost, and rapid detection, and are widely used in clinical practice.

When you go to the hospital for a check-up, you can bring some books to help you pass the time while waiting in line. Wear loose clothes. If you wear too many or too tight clothes, it is best to take off the sleeve on the side where blood is to be drawn to avoid the clothes pressing on the blood vessels too tightly or for too long, causing some trouble.

During early pregnancy, if the blood hCG value is low, it may be due to miscalculation of the last menstrual period. At this time, you should check again the next day. If the rising number does not double, you need to go to the hospital for a B-ultrasound at 45 days to determine whether it is an intrauterine pregnancy. If it is an intrauterine pregnancy, it may be caused by delayed fetal development. If there is no accompanying bleeding or other conditions, you need to go to the hospital in time for pregnancy preservation treatment. If there is no problem with the development of the embryo itself, hCG will double after effective treatment.