What is the process of the gestational sac becoming the placenta?

When pregnant women reach the middle and late stages of pregnancy, they must have a detailed examination of the placenta during prenatal check-ups at the hospital, because the placenta is so important to the fetus. Clinically, there are many problems with the placenta, such as the placenta previa that everyone has heard of, as well as placental abruption and abnormal morphological placenta, etc. These problems will affect the fetus and even cause miscarriage. Many people don’t know how a hard drive turns into a placenta. Let’s learn more about it below.

The process of gestational sac turning into placenta:

When talking about gestational sac and placenta, friends will think of the fetus first. In fact, there are many relationships between the two. The gestational sac can turn into the placenta after a period of time. So when does the gestational sac turn into a placenta? What should I do if the placenta is too thick? Come and take a look.

When does the gestational sac become the placenta?

The gestational sac is the primitive placental tissue, a small embryo wrapped by the amniotic membrane and vascular network. The gestational sac is the initial form of pregnancy. At that time, the fetus has not yet formed, and the fetal heartbeat is already there when the embryonic bud appears. The gestational sac is also a product of ectopic pregnancy. The fertilized egg fails to enter the uterus at 7 days due to certain factors such as inflammation and adhesion. Ectopic pregnancy usually causes heavy bleeding, and generally the fetus cannot survive. From this, we can see that the size of the gestational sac is related to the growth of the fetus. So, what is the size of the gestational sac at 40 days of pregnancy? At 40 days of pregnancy, it is approximately the 6th week of pregnancy and approaching the 7th week. In the 6th week, the fetus grows to 0.85 cm, and the head, brain alveoli, facial organs, respiratory, digestive, nervous and other organs of the fetus are differentiated. The fetal sac is clearly visible on B-ultrasound, and the fetal bud and fetal heartbeat are seen; in the 7th week, the fetus grows to 1.33 cm, and the embryo has the rudiments of a human, with all the body segments differentiated, the limbs separated, and each system further developed. B-ultrasound clearly shows the embryo and fetal heartbeat, and the gestational sac occupies about 1/3 of the uterine cavity.

The placenta is an accessory structure that connects the mother and the baby and is the source of the baby's life. It attaches to the uterus and receives nutrients and oxygen for the baby inside. If it becomes abnormal or aged, it will directly affect the baby's growth and development, and even endanger the baby's life.

Everyone's situation is different. Placenta: mid-pregnancy (12-28 weeks) - placenta grade 0; late pregnancy (30-32 weeks) - placenta grade Ⅰ; after 36 weeks - placenta grade Ⅱ (relatively mature). If a grade III placenta is found before 37 weeks and combined with the value of the biparietal diameter and the estimated fetal weight of 2500 grams, placental precocity should be considered and the patient should be alert to the possibility of intrauterine growth retardation. At 38 weeks, the placenta enters grade III, indicating that the placenta is mature.