What are the dangers of having a lower placenta?

After pregnancy, the baby is in the mother's womb. We can use B-ultrasound to see whether the baby is lying upright or on its side in the belly. The placenta is not the place where the pregnant woman's baby is born, but a place that provides nutrients for the baby to grow. Many expectant mothers are particularly concerned about the location of the placenta. They worry that it will be difficult to give birth if the position is not right. So what are the dangers of having a lower placenta?

According to your situation, it is normal for the placenta to be low on the posterior wall of the uterine forearm. If it is located at the internal os of the cervix, it is considered placenta previa, which is a higher risk and can lead to heavy bleeding.

Pay attention to rest, eat a balanced diet, maintain a happy mood, pay attention to the cleanliness of the vulva, avoid strenuous exercise, eat less spicy food, pay attention to fetal movement, and lie on the left side.

The placenta is an important organ for material exchange between the fetus and the mother. It is an organ that combines the tissues between the mother and the fetus during human pregnancy and grows from the embryonic embryonic membrane and the maternal endometrium. 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 synthesizes a variety of hormones, enzymes, cytokines, etc. to maintain normal pregnancy. The placenta is also a traditional Chinese medicine, called placenta, also known as human placenta, afterbirth, chorion, afterbirth, and fetal membrane.

structure

1. Amniotic membrane

The fetal part of the placenta is the innermost layer of the placenta. The amnion is a translucent membrane attached to the surface of the chorionic plate. The amniotic membrane is smooth, has no blood vessels, nerves or lymph, and has a certain degree of elasticity. The normal thickness of human amniotic membrane is 0.05mm.

2. Chorionic villi

The fetal part of the placenta makes up the majority of the placenta during pregnancy. When the embryo develops to 13 to 21 days, the villi gradually form. Around the third week after fertilization, when intravillous blood vessels form, fetoplacental circulation is established. The villi that are in contact with the basal decidua are called the chorionic villi. The ends of the villi suspended in the intervillous space filled with maternal blood are called free villi, and those that grow into the basal decidua are called fixed villi. The placental septum that grows from the decidual plate incompletely separates the fetal lobe into maternal lobes. Each maternal lobe contains several fetal lobes, and each maternal lobe has its own spiral artery to supply blood. The spiral arteries of the pregnant woman's uterus (also called the uteroplacental arteries) pass through the decidual plate into the maternal lobe. The substance exchange between mother and fetus takes place in the villi of the fetal lobule. The fetal blood goes through the umbilical artery to the villus capillaries, and exchanges substances with the maternal blood in the intervillous space. The two are not directly connected. The villous trophoblast of the full-term placenta is mainly composed of syncytiotrophoblasts, with cytotrophoblasts only scattered around. The inner layer of the trophoblast is the basement membrane, which serves as a placental barrier.

3. Decidua basalis

The maternal part of the placenta makes up a very small part of the placenta in full-term pregnancies. The maternal surface of the placenta is divided into about 20 maternal lobes visible to the naked eye.