Can embryonic arrest be prevented in advance?

Written by Du Rui Xia
Obstetrics
Updated on February 24, 2025
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There are no absolute methods in medicine to prevent embryonic arrest in advance, but we can intervene to some extent, such as by conducting pre-pregnancy check-ups. Both spouses should undergo comprehensive examinations at a hospital to see if there are any physical abnormalities that could affect pregnancy.

It is also important to avoid exposure to harmful substances during pregnancy, such as working with hazardous materials, exposure to radiation, and consuming contaminated food. Additionally, pregnant individuals should quit smoking, abstain from alcohol, relax, maintain an optimistic attitude, and actively exercise to enhance their immune system.

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Written by Liu Wei Jie
Obstetrics
1min 6sec home-news-image

What are the reasons for two instances of embryonic arrest?

According to current medical viewpoints, there are various reasons for embryonic arrest, but in 50% of cases, the cause is unknown. Identified causes can generally be divided into several categories such as chromosomal issues, maternal metabolic issues including thyroid disorders, diabetes, and polycystic ovary syndrome. Additionally, immune factors such as lupus erythematosus or Sjögren's syndrome, along with abnormal antibodies, are also reasons. Furthermore, abnormal maternal anatomical structures, like abnormal uterine development, can lead to embryonic arrest. Paternal factors, such as abnormal sperm, can also result in embryonic arrest. Upon encountering embryonic arrest, if it occurs once, it can be observed initially. However, if there are two or more instances, comprehensive examinations for both partners are necessary, including chromosomal tests.

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Written by Zhang Lu
Obstetrics
1min 20sec home-news-image

Does an embryonic arrest require a dilation and curettage?

According to the different intervention methods, surgical abortion is needed during an abortion procedure, while medical abortion might not be necessary. Embryonic arrest, also known as missed abortion, occurs during pregnancy due to various factors which result in the absence of a fetal heartbeat in the gestational sac or fetus. Most cases of embryonic arrest occur during early pregnancy. If no fetal heartbeat is observed by the 9th week of pregnancy, it is diagnosed as embryonic arrest. Once embryonic growth ceases, it is crucial to intervene artificially as soon as possible to expel the gestational sac from the uterus. Common methods of artificial intervention include medical abortion and surgical abortion. If surgical abortion is chosen for an embryonic arrest, it involves direct curettage or evacuation of the uterus. Embryonic arrest can also be treated with medical abortion, which involves taking oral medication to stimulate uterine contractions, soften the cervix, and expel the gestational sac from the uterus. A follow-up is required about two weeks after the abortion. If there is no residual material in the uterine cavity, then curettage is not necessary; however, if substantive residuals or blood signals are present inside the uterine cavity, then curettage is needed.

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Written by Du Rui Xia
Obstetrics
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What will happen if a miscarried embryo is not removed from the uterus?

After embryonic arrest occurs, it is necessary to handle it promptly, which involves expelling the embryo from the body. If the embryo remains for an extended period without timely intervention, it can easily lead to an infection in the uterine cavity, or even sepsis. The fetus may adhere to the uterine wall, making it difficult to clean later and can easily cause severe bleeding, seriously endangering the patient's life. Therefore, once we identify that an embryonic arrest has definitely occurred, it is crucial to undergo prompt uterine cleaning treatment. It is advisable to communicate with the hospital doctors and take appropriate measures.

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Written by Du Rui Xia
Obstetrics
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How long does it take for a miscarried embryo to be expelled from the body?

After the embryo ceases to develop, some may naturally miscarry. Others may not be expelled naturally and require medical intervention for removal. After the embryo has stopped developing, the timing of expulsion varies from person to person due to different physical constitutions. Most women can naturally miscarry after the embryo stops developing, typically within about ten days when expulsion occurs. However, some embryonic tissue may be larger and adhere to the uterine cavity, preventing expulsion and causing continuous vaginal bleeding. In such cases, a visit to the hospital for an ultrasound is necessary, followed by medical abortion or a dilation and curettage procedure.

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Written by Zhang Lu
Obstetrics
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Can a miscarried embryo be expelled naturally?

Embryonic arrest refers to the lack of natural development of the gestational sac in early pregnancy, characterized by the absence of a fetal heartbeat. If there is still no fetal heartbeat or embryo detected during an ultrasound at 8-9 weeks of pregnancy, it should be diagnosed as embryonic arrest. After embryonic arrest occurs, the vast majority require medical intervention. Of course, some cases of embryonic arrest can resolve naturally, leading to a miscarriage. However, this is not a reliable occurrence and is relatively rare in clinical practice. Moreover, the longer the wait, the greater the potential harm to the woman's health. For embryonic arrest, once diagnosed, it is urgent to intervene medically to remove the gestational sac from the uterus, minimizing harm to the woman. Common methods include medical abortion or a dilation and curettage surgery, either of which can be chosen.