After a fertilized egg has implanted in the uterus, the concentration of the hormone HCG (human chorionic gonadotropin) in the blood and urine increases sharply. A pregnancy test can measure this increased concentration of HCG in the urine. Modern pregnancy tests can indicate pregnancy immediately after the absence of the period or even 10 days after sexual intercourse.
The procedure is slightly different for the individual tests. The concentration of HCG hormones is highest in the morning urine immediately after getting up, but most tests can be carried out at any time of the day. In modern tests, a test stick or test disc is simply moistened with urine and after a short time, the result can be read. The test consists of a control field, which changes color to indicate whether the test was carried out correctly, and a result field, which changes color only if you are pregnant. Slight discoloration in the right place in the results field also indicates pregnancy. However, the test should then be repeated after a few days. Even if the test was negative but there is no menstrual period, the test should be repeated.
When To See A Doctor
When the pregnancy test is positive. If the test is negative but there is no bleeding. What your doctor can do:
- The doctor can detect HCG hormone in the blood during pregnancy.
- The doctor can use ultrasound to determine whether you are pregnant.