Standards for testing for threatened abortion

We are all familiar with threatened abortion. Many pregnant mothers are very worried when they experience bleeding when they are about to give birth. Even though the due date has not yet arrived, the family members become anxious when this happens. Today we will learn about the standards for examining for threatened abortion.

1. Urine pregnancy test or determination of β-subunit levels in the blood: Positive urine pregnancy test: At 33-35 days after menstruation, when the gestational sac is seen by vaginal ultrasound, the subunit level in the blood is about 1800 milliunits/ml, and can reach 20,000 units/ml for a period of time. Values ​​below this generally indicate a poor prognosis.

2. Ultrasound examination: Through vaginal ultrasound examination, the gestational sac can be seen about 35 days after the last menstrual period, and the primitive heart tube pulsation of the fetus can be seen after 42 days; abdominal ultrasound examination shows the gestational sac 35 to 42 days after the last menstrual period, and the primitive heart tube pulsation of the fetus can be seen 49 days after the last menstrual period.

3. Determination of blood progesterone levels: Recent studies have found that the determination of blood progesterone levels is more accurate in judging the prognosis of pregnancy. If the blood progesterone level is lower than 5 ng/ml, whether it is an intrauterine pregnancy or an ectopic pregnancy, it generally indicates that the pregnancy has died. If the blood progesterone level is higher than 25 ng/ml, it indicates that the intrauterine pregnancy is alive; if it is between 5 and 25 ng/ml, reexamination and follow-up are required.

The above content is what the experts introduced to us about the examination of threatened abortion. Patients are kindly requested to learn about it. After we understand the examination content and items of threatened abortion, we can find the symptoms and do a good job of examination, which can play a key role in diagnosis and treatment.