What is the cause of the absence of fetal heart buds?

If you are pregnant in utero, there is no fetal heart bud, it is possible that the baby is not developing well, and it is also possible that the time is short. If menstruation is not allowed, it is often delayed, causing unstable ovulation time, thus affecting the calculation of gestational weeks. It is recommended to relax, not nervous, take blood for chorionic gonadotropin and progesterone, and judge whether fetal development is normal according to the examination results. After a week, review the fetal development. Pay attention to rest, closely observe whether there is abdominal pain and vaginal bleeding, pay attention to light diet, fast irritant food, prohibit strenuous exercise, prohibit the same room and bath, and see a doctor in time.