How to calculate the time of conception

In general, after a woman is pregnant, there is a difference between the time of conception and the time of pregnancy. The time of conception is generally the time of ovulation. The ovulation time is generally calculated from the first day of the last menstrual period. The time of conception is generally the same as that of ovulation. Therefore, there is a difference between the two times. This general menstrual cycle of patients, can be calculated in this way. Irregular menstrual cycle of patients, generally through color Doppler ultrasound and blood tests to determine the time of pregnancy, so calculate pregnancy weeks.