How to calculate the expected date of

Calculation method: starting from the first day of last menstruation, reduction of the month 3, plus 9 when enough today, number 7. If any of your last menstruation is on September 18, 2000, according to the formula, 3rd reduction number 7 of the month, due on June 25, 2001.

Don\'t remember the last menstruation date can be calculated based on the fetal movement date probably. General FM date approximately 18-20 weeks of pregnancy, and can be calculated approximately 20 weeks due.

If the conditions for ultrasonic measurement of fetal body diameter for measuring, to detect gestational age, and the calculated expected date.

Above the expected date of algorithm and differs from the actual date of childbirth is often 1-2 week, if the normal menstrual cycle length large, expected date can vary more, the projected date is an approximate number, who before and after the expected date of delivery within 2 weeks is normal.