After how many days of having intercourse can pregnancy be detected, what is the first sign?
- bySudha Saxena
- 16 Jun, 2025

Soon after marriage, there is a demand for good news from the newly wed bride. At the same time, newly wedded couples are often confused about pregnancy.
Questions about physical relations and pregnancy often arise in the minds of new couples. In such a situation, let us know how many days after having physical relations does pregnancy become known? What is its first sign?
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According to medical studies, it can take 7 to 14 days to detect conception after having sex. However, there are many reasons behind detecting it.
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The first reason is missing periods, the second reason is hormonal changes. After this, testing kits also help you.
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Actually, after conception, when the fertilized egg gets implanted in the wall of the uterus, the production of hCG hormone (Human Chorionic Gonadotropin) starts in the body.
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In such a situation, modern home pregnancy test kits are very helpful in detecting pregnancy. These kits can detect the hCG hormone in just 7-12 days.
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Many testing kits are so sensitive that they can detect hCG levels as low as 10-25 mIU/mL. However, for better results, it is advisable to test after about 14 days of missing periods.
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According to doctors, pregnancy can be detected within 6-8 days of sexual intercourse through a blood test (Beta hCG test). This test can also measure the lower level of hCG.
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Apart from this, it usually takes 4-5 weeks for the gestational sac to be visible in the uterus through an ultrasound scan. This procedure is the most reliable way to confirm pregnancy and check the condition of the fetus. However, it is less useful in the early stages, because the development of the fetus is not fully visible at such an early stage.
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Usually, the first and most common sign of pregnancy is a missed period. This sign is most obvious in women whose periods are regular.
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Light bleeding or spotting may occur 6-12 days after conception when the fertilized egg implants in the uterine wall. It is usually pink or brown in color and lighter than periods. About 20-30% of pregnant women experience this symptom.
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Due to increase in hCG and progesterone hormones, the body feels tired and sleeps more. This symptom can appear 10-14 days after having physical relations.
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Nausea and vomiting are commonly called morning sickness. It can start in 2-8 weeks of pregnancy. In some women, this symptom may appear even earlier. This symptom is seen in 50-80% of pregnant women.