How long does it take for threatened miscarriage to occur?

Threatened miscarriage may occur most often between 5 and 12 weeks of pregnancy, often with mild vaginal bleeding, abdominal discomfort and other symptoms, requiring close observation and early medical attention to ensure the health of mother and baby. The timing of threatened miscarriage varies depending on individual circumstances, but the risk is usually higher in the first three months of pregnancy, and monitoring should be strengthened and certain preventive and treatment measures should be taken.

1Time of occurrence and main causes of threatened abortion

Threatened miscarriage usually occurs between the 5th and 12th weeks of pregnancy. During this period, the embryonic development is still unstable and can be easily affected by a variety of factors.

Genetic factors: About 50%-70% of early miscarriages are related to embryonic chromosomal abnormalities, which are directly related to sperm or egg quality problems and gene mutations during fertilization and are usually difficult to prevent.

Environmental factors: For example, excessive exposure to tobacco, alcohol, radiation or toxic substances during pregnancy can significantly increase the risk of early miscarriage. These high-risk environments should be avoided during conception and pregnancy to protect the development of the embryo.

Physiological and pathological causes: Maternal diseases such as abnormal thyroid function, severe obesity, diabetes, severe anemia, etc., abnormal uterine structure such as uterine septate, cervical insufficiency or progesterone deficiency may affect the stability of pregnancy and induce threatened abortion.

2Symptom monitoring and response measures for threatened abortion

Symptom monitoring: Threatened abortion may be manifested by a small amount of vaginal bleeding, mostly bright red or dark red, accompanied by lower abdominal pain or backache. These signals indicate that pregnant women need to stay in bed temporarily and seek medical attention as soon as possible. Doctors can determine the condition of the embryo and the risk of abortion through ultrasound examinations and blood tests such as β-hCG and progesterone.

Drug treatment: In the face of threatened abortion caused by luteal insufficiency, progesterone preparations such as dydrogesterone, indomethacin, etc. can be used to help maintain pregnancy; for some people with strong uterine contractions, small doses of antispasmodics such as nifedipine or perampanib can be used.

Non-drug intervention: Pay attention to bed rest, and take appropriate supplements of folic acid and vitamin E under the doctor's advice to support fetal growth. Adjust the dietary structure and consume more foods rich in high-quality protein such as milk, eggs, soybeans, etc. to eliminate embryonic maldevelopment caused by malnutrition.

3 How to prevent threatened miscarriage

Avoid strenuous exercise, stay away from pollution sources, and maintain mental balance during pregnancy preparation and pregnancy.

Regular monthly prenatal checkups can screen for genetic diseases and potential maternal health risks.

Supplement folic acid, calcium and vitamins in time to promote the healthy development of the embryo.

If vaginal bleeding or abdominal pain occurs in early pregnancy, you should immediately seek medical attention for a clear diagnosis and strictly follow the doctor's advice to take scientific treatment and care. Good daily health management will significantly reduce the risk of miscarriage and improve the stability and safety of the entire pregnancy.