Gestational sac, fetal bud, fetal heart rate comparison table

Pregnant friends can use B-ultrasound to check whether it is an intrauterine pregnancy. If it is an intrauterine pregnancy, you will find the presence of a gestational sac in the uterus, and even a fetal bud and fetal heartbeat, which means intrauterine pregnancy. So, what is the correspondence between the embryonic bud, fetal heart rate and gestational sac? The following will introduce the size of the embryonic bud, fetal heart rate and gestational sac respectively.

Correspondence table of fetal sac, fetal heart and fetal bud

The comparison between the size of the gestational sac and the fetal heartbeat varies from person to person, and also depends on the number of days of pregnancy. The size of the gestational sac and the size of the fetal heartbeat will be different depending on the pregnancy time.

Generally, around six weeks of pregnancy, the gestational sac is about one centimeter, and around seven weeks of pregnancy, the gestational sac is about 2 to 3 centimeters, and the size of the fetal bud is about one centimeter, which is the size at seven weeks of pregnancy. With normal menstruation and a 28 to 30 day menstrual cycle, there should be a fetal bud and fetal heartbeat around seven weeks of pregnancy. If the gestational sac is 2 to 3 centimeters and there is no fetal bud and fetal heartbeat, it means that the baby has stopped growing.

1. Fetal bud and fetal heart size

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. Generally, the embryo and fetal heart can be seen through B-ultrasound at 6-7 weeks of pregnancy. The size of the embryo bud and fetal heart is around 0.5-1 cm.

2. Fetal sac

The gestational sac is the initial embryonic tissue, a small test tube embryo encapsulated by the amniotic membrane and vascular network. The gestational sac is the initial shape of pregnancy. The baby has not yet been born at that time. When the embryonic bud and fetal heartbeat appear, the fetal heartbeat has already begun. At 4 weeks, the gestational sac is not large enough to show any signs of pregnancy clearly on ultrasound. At 5 weeks, a small gestational sac can be seen on B-ultrasound, which occupies less than 1/4 of the uterine cavity, or the embryonic bud and fetal heartbeat can be seen from it. At 6 weeks, the gestational sac is clearly visible on B-ultrasound, and the embryo, fetal heart rate and fetal heart rate can be seen. At 7 weeks, B-ultrasound can clearly show the embryo, fetal heart rate and fetal heart rate, and the gestational sac occupies about 1/3 of the uterine cavity. At 8 weeks, B-ultrasound can show that the gestational sac occupies about 1/2 of the uterine cavity, the shape of the fetus and the fetal movement are clearly visible, and the yolk sac can be seen. At 9 weeks, B-ultrasound showed that the gestational sac almost filled the uterine cavity, the outline of the fetus was clearer, and the embryo began to appear. At 10 weeks, B-ultrasound showed that the gestational sac had begun to disappear, and the crescent-shaped embryo was visible, and the fetus was active in the amniotic fluid of the pregnant woman. At 11 weeks, B-ultrasound showed that the gestational sac had completely disappeared and the embryo was clearly visible.

The above is a detailed introduction about the correspondence table between the embryo bud, fetal heart rate and fetal sac. I believe that after reading the above content, everyone has already understood the size of the embryo, fetal heart rate and gestational sac. In fact, the fetal bud, fetal heart and fetal sac do not always exist. After a certain period of time, they will disappear, and then the fetus and embryo will be formed. In the near future, the fetus will be born.