Can medication completely clear an arrested embryo?

Written by Du Rui Xia
Obstetrics
Updated on March 28, 2025
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After confirming that there is an embryonic arrest, timely treatment should be carried out, which can be either medical abortion or curettage. If the pregnancy is less than 50 days, medical abortion can be an option. Afterwards, an ultrasound should be conducted to check if everything has been completely expelled. If no residues are found, no further treatment is required. However, if any residues are discovered, another curettage must be performed. Therefore, whether a medical abortion can be completely effective in cases of embryonic arrest depends on the gestational age at the time of the occurrence.

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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 Du Rui Xia
Obstetrics
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Will the embryo still grow if the embryo has stopped developing?

When embryonic arrest occurs, the embryo will no longer grow. There are many causes for embryonic arrest, such as congenital developmental defects of the gestational sac, abnormalities in the fertilized egg, congenital genetic diseases, and chromosomal abnormalities, all of which can easily lead to the cessation of embryonic development. At this time, regular observation of the embryonic tissue, which will no longer continue to grow and no fetal heartbeat is present, can confirm the condition of embryonic arrest. It is recommended to proceed with further treatment, such as medical abortion or surgical abortion. After the abortion, it is important to rest and enhance nutrition. It is also advised to have a thorough pregnancy check-up before the next pregnancy attempt to prevent recurrence of embryonic arrest.

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Written by Zhang Lu
Obstetrics
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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.

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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 Liu Wei Jie
Obstetrics
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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.