Unseen heart tube pulsation means that there is no fetal heart.
A heart tube beat represents the fetal heart, which can be seen with an echocardiogram around the second month of pregnancy. Unseen heart tube beats means that the fetal heart is not detected.
Do not be too nervous in this case, the time of menopause is not calculated accurately, if the time of menopause is short, the pregnancy is short and the fetal heart has not yet appeared. Slow growth and development of the embryo, malnutrition, causing delayed embryonic development, the gestational sac is small can not see the heart tube beat.
If you find no heart tube pulsation, you can review the ultrasound in another week, and consider the embryo to have stopped developing if no heart tube pulsation can be detected at the latest 8 weeks of pregnancy.
If it is confirmed that the fetus has stopped developing, the fetus should be aborted under the guidance of a doctor.