The faint beating of the fetal heart in 6 weeks of pregnancy is mostly normal, and in very few cases it may be abnormal, which can be determined by close observation and regular ultrasound examination, mainly in the following two cases: 1, normal: the fetal heart usually appears in 6-8 weeks of pregnancy, the faint beating of the fetal heart in 6 weeks of pregnancy is mostly normal, because at this time the menopause time is short, the embryo development is still early, and some pregnant women even still The fetal heartbeat will become more and more powerful as the pregnancy week increases; 2, abnormal: very few pregnant women may experience embryonic arrest, if the fetal heartbeat is weak at 6 weeks of pregnancy, the fetal heartbeat is not only not enhanced, but even no fetal heartbeat is found in the subsequent examination, suggesting that embryonic abortion may have occurred, combined with the blood If the HCG level does not double or decreases, termination of pregnancy should be considered. Therefore, if the fetal heartbeat is weak in the 6 weeks of pregnancy, there is no need to worry too much, and the fetal heartbeat can be checked by ultrasound after 1-2 weeks, and will gradually increase as the pregnancy week increases. If the blood HCG doubles well, it usually indicates that the embryo is developing well.