Embryonic arrest generally occurs at what time?

Written by Liu Wei Jie
Obstetrics
Updated on September 06, 2024
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First, let's discuss what embryonic arrest means. There are two scenarios of embryonic arrest. The first scenario is where the embryo initially does not develop well, leading to the cessation of development in the very early stages of pregnancy. The second scenario occurs when the embryo initially develops well, but after a period, embryonic arrest happens. Therefore, embryonic arrest generally occurs during early pregnancy but can also occur later, around the middle of early pregnancy. It can happen at any time, but it is most commonly identified after 8 weeks. However, some cases involve the presence of an embryonic bud and heart tube, and embryonic arrest can still occur even at 10 or 11 weeks.

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Written by Du Rui Xia
Obstetrics
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Can a miscarriage be detected through a blood test?

Embryo arrest is primarily diagnosed through ultrasound examination, and blood tests alone cannot fully determine embryo arrest. Pregnant women still need to rely on comprehensive examinations to make a diagnosis. During pregnancy, the levels of progesterone and human chorionic gonadotropin (hCG) are continuously rising. If there are factors that cause embryo arrest, these values will no longer increase, or there may be a continuous decline observed during tests. Therefore, embryo arrest must rely on ultrasound examination for accurate diagnosis, supplemented by blood tests to measure hormone levels, using a comprehensive judgment to confirm the condition of embryo arrest.

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Written by Zhao Li Li
Obstetrics
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What are the causes of embryonic arrest?

If an embryonic arrest is discovered, there are many specific reasons for the arrest. Firstly, the main reason for embryonic arrest is due to congenital abnormalities in the formation and development of the fertilized egg, which is a relatively common situation. Moreover, embryonic arrest usually occurs early when there are developmental abnormalities. In some cases, it may be caused by maternal factors, such as abnormal diseases in the mother or abnormalities in chromosomes, which can lead to poor embryonic development and subsequently cause embryonic arrest. Occasionally, issues related to the viability of the male sperm, or the presence of abnormal sperm, may also lead to embryonic arrest. Because there are many reasons for embryonic arrest, it is generally not possible to systematically investigate the specific causes.

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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
Obstetrics
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Does an embryonic arrest require a uterine curettage?

After discovering that the embryo has ceased developing, it is necessary to undergo a uterine cleaning treatment. If an embryo arrest is not dealt with promptly, it can cause an infection in the uterine cavity and even lead to abnormalities in the woman's coagulation function, which is very detrimental to health. However, a uterine cleaning is not always necessary. If the gestational sac is relatively small, medications can be used to induce contractions of the uterus, facilitating the expulsion of the gestational sac from the body. It is advisable to handle the situation promptly after discovering an arrested embryo and to perform thorough prenatal screenings before attempting to conceive again, to prevent the recurrence of such adverse pregnancy conditions.

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Written by Zhang Lu
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Is embryonic arrest related to diet?

Embryo arrest, also known as missed miscarriage, refers to the absence of a fetal heartbeat in the early stages of pregnancy due to various factors affecting the gestational sac. Typically, if no fetal heartbeat and embryo are detected during an ultrasound at about 8 to 9 weeks of pregnancy, it can be diagnosed as embryo arrest. Currently, there are many reasons for embryo arrest in clinical practice, but many pregnant women look for causes in their daily life, such as diet and exercise. However, these factors are largely unrelated to embryo arrest. While diet plays a very important role in human health, the growth and development of an embryo are mainly influenced by its own genetic material, endocrine, and coagulation factors, which are generally unrelated to diet. Therefore, when embryo arrest occurs, one should not look for reasons in diet or other daily life factors; instead, it is advisable to undergo targeted medical examinations to determine the specific cause.