How many centimeters is the gestational sac long?

Before the fetus develops, it belongs to the gestational sac. As the gestational sac appears and develops, the fetal bud and fetal heart will grow. We know that in the process of sperm and egg transfer, a fertilized egg is formed. Only after implantation will the fertilized egg gradually divide into multiple cells and become a gestational sac. During the first 30 days of pregnancy, the fetal bud will gradually form, and finally the fetal heart will be formed. This is a process in which the fetus is gradually formed.

How many centimeters is the gestational sac long?

After the sperm and egg combine to form a fertilized egg, the implanted fertilized egg slowly divides into a multicellular gestational sac. After more than thirty days of pregnancy, the primitive cells differentiate and slowly form a fetal bud, which further develops into a fetal heart. This is the process of a fetus forming.

Usually the period from three weeks of pregnancy to the first month of pregnancy is called the embryonic stage. At this time, blood flow signals with heart fluctuations can be seen during B-ultrasound or color ultrasound examinations. Further growth and development will form a fetus.

The development of the embryo will form a gestational sac on the 30th to 40th day of pregnancy, a fetal bud on the 40th to 50th day of pregnancy, and a fetal heart on the 50th to 60th day of pregnancy. Generally, the embryonic bud and fetal heart can be seen when the gestational sac is 3.1 cm.

Reasons for pregnancy without embryo

Generally, the embryo bud can be seen around 40 days of pregnancy, and the fetal heartbeat can be seen around 50 days of pregnancy. If there is no embryo bud during pregnancy, it is considered to be maldevelopment. The main causes are as follows:

1. Chromosomal abnormality. Whether it is sperm or egg, as long as the chromosomes carrying genetic material are abnormal, even if a fertilized egg is formed, the embryo will not develop normally.

2. Contact with toxic substances. Hazardous substances include toxic chemicals, inferior decoration materials, etc. If pregnant women come into contact with it, it will affect the growth and development of the embryo.

3. Exposure to radiation or large amounts of electromagnetic radiation. If an expectant mother is exposed to X-rays without knowing it and receives a large amount of radiation, the development of the fetus will also be affected.

4. Smoking or drinking. Smoking and excessive drinking not only harm women's reproductive ability, but also affect the quality of sperm, causing poor development of the embryo bud and ultimately leading to the risk of fetal malformations.

In addition to their own physical health, expectant mothers should carefully observe every stage of fetal development and pay attention to whether the fetus has any abnormalities. If there are any abnormalities, they need to go to the hospital for examination and treatment in time. In addition, pregnant women should also maintain a happy mood, as mood is also one of the key factors affecting fetal growth.