Can a 10-day pregnancy be detected by ultrasound?

Generally, pregnancy cannot be detected by ultrasound (B-ultrasound) ten days after conception.

In clinical practice, the duration of pregnancy is calculated from the first day of the last menstrual period. Based on this calculation, ovulation has not yet occurred ten days into the cycle. At this stage, there is no ovulation, no fertilized egg formation, and therefore no pregnancy. As a result, ultrasound cannot detect pregnancy at this early point. Even if counting from the day of ovulation, it typically takes about ten or more days for the fertilized egg to form and complete implantation. Thus, within 10 days after ovulation, implantation usually has not yet occurred, making it impossible to detect via ultrasound. To test for pregnancy, it is recommended to use an early pregnancy test strip about one week after a missed period. For ultrasound examination, it is best to wait approximately 20 days after fertilization before visiting a正规 hospital, as pregnancy can usually be confirmed by then.

The most obvious sign of pregnancy in women is the absence of menstruation. Additionally, some women may experience symptoms such as implantation pain or implantation bleeding. It is advisable to stay relaxed and avoid excessive stress or anxiety, which might negatively affect conception.