How many mm does the gestational sac have to have a fetal heartbeat

The fetal sac is a small thing that appears in the human body after a pregnant woman becomes pregnant. This little thing will slowly grow and develop in the mother's uterus, slowly form a fetal bud and fetal heart, and later become a small test tube embryo with a fetal heartbeat. Many people know that the gestational sac forms in the early stages of pregnancy, but they do not know how big the gestational sac must be for the fetal heartbeat to appear. How many mm does the gestational sac have to be for the fetal heartbeat to occur?

After the fusion of sperm and egg to form sperm-egg union, the embryo implants and the sperm-egg union gradually disintegrates into a multicellular fetal sac. After more than thirty days of pregnancy, each primitive cell begins to divide and gradually forms a fetal bud and fetal heartbeat, which further develops into a fetal heartbeat. This is the whole process of a fetus being born.

Generally, the period from the third week of pregnancy to the first month of pregnancy is called the embryonic bud and fetal heart stage. At this time, blood data signals of heart beats can be seen during B-ultrasound or ultrasound examination, and further development will lead to the formation of a fetus.

For normal intrauterine pregnancy, B-ultrasound examination can usually show the fetal heartbeat and fetal heartbeat in the uterine cavity at 6-7 weeks of pregnancy. If there is still no embryonic bud, fetal heartbeat or fetal heartbeat after seven weeks of pregnancy, the expectant mother should consider the possibility of embryo termination and go to the hospital immediately to check the condition of the fetus.

Due to the growth and development of the test tube embryo, a gestational sac is produced on the 30th to 40th day of pregnancy, a fetal bud and fetal heartbeat are produced on the 40th to 50th day of pregnancy, and a fetal heartbeat is produced on the 50th to 60th day of pregnancy.

If you do an ultrasound examination around 40 days into the pregnancy, you can see the embryonic bud and fetal heart, which is 0.5-1 cm in size and shaped like a small seahorse. If the embryonic bud or fetal heartbeat is not detected, the expectant mother needs to pay attention.

However, there are also cases where some women with irregular menstrual cycles, late ovulation, or late embryo implantation have fetal buds and fetal heartbeats in their uterine cavity, and the timing of the fetal heartbeat will also be relatively delayed. It is recommended to observe for a week and then go to the hospital for a follow-up visit.

According to the detailed introduction in the article, we can understand that generally the fetal heartbeat will appear when the fetus is more than 40 days old. At this time, the gestational sac has developed into a 5-10mm fetal heartbeat. As a pregnant mother who is full of curiosity about her baby, you'd better read the article to understand what the development process of her baby is like.