40 days pregnant, see?

40 days of pregnancy b ultrasound is generally able to see, if you can not see can be postponed a week later b ultrasound examination again. 40 days of pregnancy is generally calculated from the first day of the last menstrual period, if the female menstrual rule, generally 40 days of pregnancy is equivalent to about six weeks of pregnancy, this time most fetuses can see intrauterine gestational sac and fetal bud, can also be clear whether intrauterine pregnancy. 50 days can generally see fetal heart beat, but, if the female menstrual cycle is irregular, or ovulation delayed, or embryo implantation too late, then the uterine embryo bud, fetal heart beat time will also be relatively delayed, it is recommended that pregnant women can go to the hospital after a week.