How Many Weeks of Pregnancy Can Be Detected?

Update Date: 2024-05-28 Source: Network

When a couple has sexual intercourse, the fertilized egg is formed and implanted to become an embryo. This process takes time, and it is not possible to detect pregnancy immediately after intercourse. It usually takes at least 1-2 weeks to detect pregnancy. There are various methods for detection, with the most common being the early pregnancy test strip, which has a relatively high accuracy rate. A positive result from the early pregnancy test strip can be further confirmed with an HCG blood test at the hospital.

1. When can pregnancy be detected?

Generally, pregnancy can be detected 7-10 days after intercourse. This can be done through a home pregnancy test using a urine sample, usually first morning urine, and the accuracy increases with the time elapsed since intercourse. In summary, pregnancy can be detected as early as one week and as late as approximately three weeks after intercourse. During the early stages of pregnancy, women may experience symptoms such as dizziness, nausea, sleepiness, and breast tenderness. These symptoms usually become more noticeable around 10-14 days after conception and may disappear after three months.

2. Timing of early pregnancy test strip detection

Early pregnancy test strips can typically detect pregnancy two weeks after intercourse. It is recommended to use first morning urine for the test, and a more accurate result can be obtained if the test is performed after a missed period of 5-10 days. If the test strip shows two red lines, it indicates pregnancy; otherwise, it indicates no pregnancy.

3. Timing of B-ultrasound examination

B-ultrasound can be used to detect early pregnancy approximately one week after a missed period. If a pregnancy sac is visible on the ultrasound, it indicates pregnancy. The main objectives of early pregnancy B-ultrasound are to confirm intrauterine pregnancy, rule out ectopic pregnancy and trophoblastic diseases, estimate gestational age, and exclude pelvic masses or uterine abnormalities. At around 35 days of amenorrhea, the pregnancy sac can be seen in the uterine cavity, and at 6 weeks of gestation, the embryo and primitive heart tube pulsations can be observed.