How Can I Determine the Number of Days I Have Been Pregnant?

The number of days for a woman to be pregnant is calculated from the first day of her last menstrual period, not from the first day of sexual intercourse. For women with regular menstrual cycles, if they successfully conceive after sexual intercourse, the expected delivery date is generally calculated by adding 9 or subtracting 3 months to the month of the first day of the last menstrual period, and adding 7 days to the date. However, for women with irregular menstrual cycles, it is not possible to accurately calculate the expected delivery date. In such cases, ultrasound can be used to estimate the number of days pregnant.

The number of days pregnant should be calculated from the first day of the last menstrual period, not from the time of sexual intercourse. On the first day of the last menstrual period, the ovarian follicle is already developing. Using this method of calculation, it is possible to accurately determine the number of days pregnant. However, if menstrual cycles are irregular, this method of calculation cannot be used, as irregular menstrual cycles can lead to irregular ovulation.

After sexual intercourse, if there is a delay in menstruation, a pregnancy test can be taken to determine if pregnancy has occurred. Generally, the expected delivery date is calculated by adding 9 or subtracting 3 months to the month of the first day of the last menstrual period, and adding 7 days to the date. If the next menstrual cycle after the last menstrual period is not remembered, doctors usually calculate the expected delivery date based on the ultrasound data obtained during the first ultrasound scan. It is important to note that sexual intercourse before menstruation does not indicate the time of conception.

Ultrasound examination is the only option to estimate the number of days pregnant based on the size of the gestational sac observed during the examination. However, the estimated number of days pregnant may not be completely accurate, and there may be a certain difference between the actual number of days pregnant and the number estimated by ultrasound. As long as the difference does not exceed two weeks, it is considered normal. Therefore, there is no need to be overly anxious about this.