Is the placenta thick?

The placenta gradually ages as the woman's pregnancy progresses. Therefore, the placenta is relatively thin in the early stages of pregnancy, and will gradually become thicker in the later stages of pregnancy. However, since each woman's physical condition is different, the thickness of the placenta is also different. As long as the thickness of the placenta is controlled within a certain range, it is normal. But is it good for a pregnant woman's health if her placenta is too thick?

What is the normal thickness of the placenta at 30 weeks?

Placental thickness can be measured by ultrasound. The thickness of a normal full-term placenta is about 36~38mm, generally not exceeding 50mm. Simply comparing the thickness of the placenta is not very meaningful, because the placenta will become thicker due to edema in cases of intrauterine infection or hemolysis. It is recommended to consult your obstetrician to determine whether further examination is needed. The membranous placenta is characterized by a large and thin placenta, which is prone to bleeding in the second trimester of pregnancy. If the placenta is small, it can lead to intrauterine growth retardation of the fetus and low birth weight at full term. The placenta thickness is 34 mm at 32 weeks of pregnancy and 31 mm at 37 weeks.

What is the thickness of the placenta?

The normal B-ultrasound placental thickness is 3.6-3.8 cm, generally not exceeding 5 cm. 2. The membranous placenta is characterized by a large and thin placenta, which is prone to bleeding in mid-pregnancy. If the placenta is small, it can lead to intrauterine growth retardation of the fetus and low birth weight at full term.

The placenta is a transitional organ that grows from the embryo's embryonic membrane and the mother's endometrium during pregnancy in metatherian and eutherian mammals and is used to exchange substances between mother and child. The fetus develops in the uterus and relies on the placenta to obtain nutrition from the mother, while both maintain a considerable degree of independence. The placenta also produces a variety of hormones that maintain pregnancy and is an important endocrine organ.

Some reptiles and fish also reproduce by giving birth to their offspring live. The embryo grows some auxiliary structures such as yolk sac and gill filaments that are closely integrated with the maternal tissues to achieve the exchange of substances between mother and child. This structure is called a pseudoplacenta.

There are two independent circulatory systems in the placenta, one for the fetus and the other for the mother (even if it develops to the sinusoidal endothelial type, such as in the late rabbit embryo, there is still a layer of endothelial cells separating the two sides). The chorion can be regarded as a semipermeable membrane, and the area in which all the villi are in contact with the maternal blood is 7 to 14 square meters; when the maternal blood flows in the gaps between the villi and the fetal blood flows in the villi, substances can be exchanged.

Generally speaking, the thickness of the placenta at 30 weeks of pregnancy is similar to that at 32 weeks of pregnancy. There is no difference. In fact, after 30 weeks of pregnancy, the baby will come to mom and dad after a while. During this period, mothers should be mentally prepared, not have too many negative emotions, and welcome the birth of the baby with a normal heart.