How old is 40 days pregnant?

After 40 days of pregnancy, after B-ultrasound examination, you can determine the size of the gestational sac. 40 days of pregnancy is about 6 weeks of pregnancy. At this time, B-ultrasound examination can find the position of the gestational sac. At 6 weeks of pregnancy, the standard value of the gestational sac is generally maintained at about 1.1~3.7 cm. If the fetal gestational sac does not develop, you must be alert to whether there is a threatened abortion or embryonic arrest. Timely follow-up monitoring is needed. If the embryo is aborted, the pregnancy should be terminated in time to find out the cause of embryo abortion. When it is pregnant again, it should be actively prevented.