How long does it take to conceive B?

If the normal menstruation is very regular, is 28 days a time, after the cessation of menstruation 35 days to do vaginal color ultrasound can see the gestational sac. If you want to do abdominal color ultrasound, you must wait until the cessation of menstruation 40 days to do abdominal color ultrasound can see the gestational sac. However, irregular menstruation is not necessarily the case, if the normal menstruation is 35 days a time, need to delay 1 week in the normal menstrual stop time to see. Therefore, when doing B ultrasound can not see the gestational sac, first of all, according to the normal menstruation is regular, it is best to determine the ovulation time, is the most accurate, under normal circumstances in the ovulation after 20 days to do B ultrasound can see the gestational sac.