After pregnancy, women generally don't menstruate again. When menstruation is delayed for about seven days, women can use early pregnancy test paper at home. If the result is positive, they need to go to the hospital for B-ultrasound to confirm pregnancy. B-ultrasound results will have a gestational sac size value. So, what is the normal value of gestational sac size for 40 days? The following experts answered this question.

What is the normal value of gestational sac size in 40 days?

At 45 days of pregnancy, the gestational sac is about 1 and 15 mm. Under normal circumstances, fetal heart beats can be seen at the latest in the seventh week of pregnancy. If you can't see the heartbeat and the gestational sac becomes smaller, you should consider the possibility of embryo abortion.

2. 45 days of pregnancy: when the fetus grows to 0.85 cm, the fetal head, brain vesicles, frontal organs, respiratory organs, digestive organs, nerves and other organs differentiate, and the fetal sac can be clearly seen by B-ultrasound, and the embryo and fetal heartbeat can be seen.

3. Due to emotional stress and other reasons, pregnant women's menstruation is delayed, ovulation period is wrong, and pregnancy time is late, which makes the gestational sac shorter than the actual menopause days. For example, menopause lasts for 50 days, but the gestational sac size is only about 40 days. It is normal that the gestational sac is too small. After a week's dynamic examination, the values of chorionic gonadotropin and progesterone are gradually increasing, the gestational sac continues to grow, and the embryo and fetal heart gradually appear, indicating that due to physiological reasons such as wrong ovulation date and late pregnancy time, the gestational sac is too small and pregnancy can continue.

4. Due to the poor development of sperm and eggs, pregnant women are infected with mycoplasma, chlamydia, rubella virus or exposed to toxic and harmful substances during pregnancy, resulting in poor development of gestational sac, which is less than normal months, and will eventually lead to miscarriage of pregnant women.