There are many reasons for the sudden absence of fetal heartbeat in the second trimester of pregnancy, and common factors include endocrine causes, uterine problems, chromosomal abnormalities, etc. It is recommended to consult a doctor in time to find out the cause.
1. Endocrine reasons: the early development of the embryo needs hormonal support, such as estrogen, progesterone and chorionic gonadotropin, etc. If the hormone level is low and cannot meet the needs of the embryo, the phenomenon of fetal arrest will occur.
2. Uterine problems: for example, the existence of longitudinal uterus or unicornuate uterus, or adenomyosis, etc., may affect the development of the embryo and lead to abortion, and it is recommended to make corrections before getting pregnant in order to avoid the occurrence of abortion.
3. Chromosomal abnormality: If the chromosomes are abnormal and the quality of the fertilized egg is not good, the fetus will stop developing in the early stage of pregnancy, which is called embryonic arrest. When a pregnant woman suffers from embryonic arrest, she will have symptoms such as vaginal bleeding and pain in the lower abdomen during early pregnancy.
It is advisable to consult a doctor in time to find out the exact cause of the condition to avoid recurrence of the condition when there is no fetal heartbeat in the second trimester.