What are the reasons for embryonic arrest with no fetal heartbeat?

Written by Du Rui Xia

Obstetrics

Updated on February 24, 2025

00:00

00:00

Embryonic arrest without a fetal heartbeat can be caused by many factors. For example, taking medications prohibited during pregnancy, exposure to harmful substances, radiation, or infections with bacteria or viruses during pregnancy. Other factors include genetic issues and poor emotional state of the pregnant woman during pregnancy. All these factors can affect the normal development of the embryo. If an ultrasound examination reveals no fetal heartbeat, it can be determined that the embryo has ceased to develop, and prompt treatment should be carried out.

Other Voices

home-news-image

Written by Du Rui Xia

Obstetrics

43sec

home-news-image

Is it necessary to send an embryo for examination if embryonic arrest occurs?

After fetal growth restriction occurs, it is still necessary to send the fetus for examination after dealing with any abnormalities that arise. There are many factors that can cause embryonic arrest, such as maternal factors, abnormal immune function, and the environment of the pregnant woman. More importantly, factors related to the embryo, such as chromosomal abnormalities in the embryo, are the main cause of embryonic arrest. Therefore, after embryonic arrest occurs, it is recommended to go to the hospital for a fetal chromosomal examination to lay a good foundation for the next conception.

home-news-image

Written by Zhang Lu

Obstetrics

56sec

home-news-image

Will the gestational sac shrink if the embryo stops developing?

Embryo arrest, also known as missed abortion, refers to a condition in the early stages of pregnancy where the gestational sac does not develop normally due to various factors. Generally, the gestational sac will not begin to shrink until the embryo has been arrested for a considerable period. In the initial stages of embryo arrest, since the duration is relatively short, the trophoblastic cells within the gestational sac can still secrete estrogens, progesterone, and chorionic gonadotropin. These hormones stimulate the possible continued growth of the gestational sac in the short term. However, as the duration of the embryo arrest extends, the proliferation of the trophoblastic cells decreases, leading to a decline in hormone levels in the body. This reduces the stimulation to the gestational sac, causing it to gradually shrink, decrease in size, and possibly leading to a natural miscarriage.

home-news-image

Written by Zhang Lu

Obstetrics

56sec

home-news-image

Does a missed miscarriage have any symptoms?

Embryo arrest, also known as missed abortion, refers to the influence of various factors on the growth and development of the gestational sac in early pregnancy, resulting in the absence of a fetal heartbeat. In the early stages, embryo arrest is imperceptible, as it often shows no signs. It is incorrect for some women to judge embryo arrest based on the presence of abdominal pain or changes in pregnancy reactions. Reactions to embryo arrest only appear after a certain period. When the embryo has been arrested for a longer period, the body may treat the gestational sac as a foreign object and attempt to expel it. This situation may present symptoms of threatened miscarriage, such as abdominal pain and vaginal bleeding. Under these circumstances, one can visit the hospital for an ultrasound to assess the condition of the fetal heartbeat. The absence of a fetal heartbeat confirms the presence of embryo arrest.

home-news-image

Written by Liu Wen Li

Obstetrics

52sec

home-news-image

Is hospitalization necessary for embryonic arrest?

This is not necessarily the case; it depends on the specific situation. Firstly, we need to consider the timing of the embryo arrest. If the embryo arrest occurs within 70 days of pregnancy, generally, hospitalization is not needed, and a miscarriage can often be handled on an outpatient basis. However, if the embryo stops developing after 70 days of pregnancy, even reaching three or four months, then hospitalization is required for a induced labor. This is because the fetus is relatively larger, making outpatient treatment problematic and riskier. Additionally, we must also consider if the pregnant woman has any complications. If there are complications alongside the embryo arrest, it is generally safer to be hospitalized.

home-news-image

Written by Zhang Lu

Obstetrics

54sec

home-news-image

How to preserve a pregnancy after embryonic arrest

Embryonic arrest, also known as missed miscarriage, refers to a condition during early pregnancy where if no fetal heartbeat is detected by ultrasound during weeks 8 to 9 of pregnancy, it should be diagnosed as embryonic arrest. Embryonic arrest indicates that the gestational sac has ceased to live, and in such cases, efforts to preserve the pregnancy are pointless as they are meaningless. However, it is important to analyze the reasons behind embryonic arrest to guide future pregnancies. Common causes of embryonic arrest include abnormalities in chromosomes, infections, immunity, and rheumatological markers. When embryonic arrest occurs, tests should be conducted targeting these indicators to clearly identify the abnormal factors, thereby guiding and potentially increasing the success rate of subsequent pregnancies.