Can an arrested embryo be expelled naturally?

Written by Zhang Lu
Obstetrics
Updated on September 02, 2024
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Embryonic arrest, also known as missed miscarriage, refers to the restriction of growth and development of the gestational sac in early pregnancy due to various factors, with no fetal heartbeat detected on an ultrasound at 9 weeks of pregnancy. When embryonic arrest occurs, a natural miscarriage may happen, but it's also possible that a natural miscarriage won't occur. Once embryonic arrest is confirmed, waiting for a natural miscarriage isn't advisable, as it is unpredictable and sometimes there might be no signs of miscarriage for a long time. Unrestricted waiting in such cases can harm a woman's body. Therefore, once embryonic arrest is diagnosed, hospitalization should be promptly sought, and artificial intervention methods such as surgical or medical abortion should be considered. While there is a possibility that the embryo could be expelled naturally, the likelihood is relatively low.

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Written by Zhang Lu
Obstetrics
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Can an ultrasound detect an embryonic arrest?

Embryonic arrest refers to a condition in early pregnancy where no fetal heartbeat appears in the gestational sac. The diagnostic criteria mainly include the lack of observable primitive heart tube pulsation via ultrasound after two months of pregnancy, at which point embryonic arrest can be confirmed. The definitive diagnosis of embryonic arrest is primarily through ultrasound. The following situations observed during an ultrasound can lead to a diagnosis of embryonic arrest: 1. If the diameter of the gestational sac exceeds three centimeters without a clear fetal heartbeat or embryo visible inside, it can be diagnosed as embryonic arrest. 2. If an embryo is already present and approximately 10 days after the appearance of the embryo, an ultrasound still does not show a fetal heartbeat, this situation can also be determined as embryonic arrest.

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Written by Zhao Li Li
Obstetrics
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What will the vaginal discharge be like if the embryo stops developing?

During prenatal check-ups, if there are indications that embryonic arrest has occurred, timely symptomatic treatment is still necessary. Normally, embryonic arrest does not affect vaginal discharge, so the nature of the discharge alone cannot be used to determine whether the embryonic development in the uterus is healthy. After confirming embryonic arrest, it is generally advised to promptly undergo an artificial abortion to completely expel the embryo from the body, to avoid long-term retention which could lead to disorders such as coagulation dysfunction. After the miscarriage due to embryonic arrest, further examination to determine the specific cause of the arrest is necessary, in order to treat the condition promptly and appropriately.

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Written by Du Rui Xia
Obstetrics
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Why are there still reactions when the embryo is arrested?

After an occurrence of embryonic arrest, some early pregnancy reactions in pregnant women will gradually ease but not disappear immediately. This is mainly related to elevated hormone levels in the body. Even after the embryonic arrest, the hormone levels in the body remain relatively high. As the arrested embryo is expelled from the body, the hormone levels will gradually decrease, and some early pregnancy reactions will also gradually ease. Generally, these adverse reactions will gradually ease and eventually disappear about a week after the embryo is expelled from the body.

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Written by Zhang Lu
Obstetrics
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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
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Can embryonic arrest be prevented in advance?

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.