Why is there still morning sickness when the embryo has stopped developing?

Written by Du Rui Xia

Obstetrics

Updated on June 02, 2025

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After a missed miscarriage occurs, the level of human chorionic gonadotropin (HCG) in the body does not immediately drop to normal levels, so symptoms of morning sickness may still occur. As the hormone levels decrease gradually following the embryonic demise, these symptoms of morning sickness will also gradually ease and even disappear. Therefore, it is important to address a missed miscarriage promptly. This can be managed through surgical abortion or medication-induced abortion to avoid prolonged untreated cases, which could lead to gynecological inflammation or abnormalities in blood coagulation functions.

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Written by Du Rui Xia

Obstetrics

38sec

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

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.

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Written by Zhang Lu

Obstetrics

56sec

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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.

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Written by Du Rui Xia

Obstetrics

42sec

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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 Du Rui Xia

Obstetrics

57sec

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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

Obstetrics

56sec

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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.