The absence of a fetal heartbeat at six weeks of a 30-day menstrual cycle is usually considered normal, and pregnant women and their families do not need to worry too much about it, and regular checkups can be done.
Whether or not there is a fetal heart in the gestational sac is mainly related to the gestational week and the size of the gestational sac, and needs to be judged in conjunction with the specific circumstances. If in the early weeks of pregnancy, the gestational sac is relatively small, through the ultrasound examination can not see the fetal heart and fetal buds, fertilized egg implantation late and women’s menstrual cycle will also affect the emergence of fetal buds and fetal heart, pregnant women need to improve the examination, further assessment and judgment.
If the pregnant woman does not have other abnormal symptoms, such as abdominal pain, bleeding, etc., there is no need to worry too much, after a week for review can be. It should be noted that if the sac grows to 2.5cm but still does not show the fetal heart and buds, attention should be paid to rule out embryonic dysplasia at the earliest possible time.
The diagnosis of embryonic development needs to be careful, should be combined with the size of the gestational sac, the length of the gestational week and the personal situation of the pregnant woman and other factors to make a comprehensive judgment, in the early stage of the fetal heart and fetal buds are not seen are normal, with the growth of the embryo, the fetal heart and fetal buds will gradually appear, pregnant women regular checkups at any time to observe the status of the embryo can be.