What are the fetal positions? What are the abnormal fetal positions?

Abnormal fetal position of pregnant women is very dangerous, which will lead to life-threatening fetus. If we understand the fetal position first, then we can clearly know whether the fetal position is normal or not. So, what are the fetal positions? What are the abnormal fetal positions? Let's find out what kinds of normal fetuses are!

1, fetal position form

(1) Head position

The presentation of the head first refers to the inverted position of the fetus in the uterus, which is a relatively normal fetal position. The presentation of the head refers to the position where the fetal head is connected with the pelvis with the occipital bone as the indication point to determine the fetal position. Generally, it can be divided into six directions, namely, left anterior occipital lobe (LOT), right anterior occipital lobe (ROA), left lateral occipital lobe (LOT), right lateral occipital lobe (L0P) and right posterior occipital lobe (R0P).

(2) Show your face first

The presentation of the face is also an inverted posture in which the fetal head is under the uterus and the buttocks are above. However, the face and pelvis of the fetus are connected together, and the position of the fetus is determined by the connection between the chin and pelvis. Generally, it can be divided into six directions, namely, left anterior chin (LMA), left lateral chin (LMT), left posterior chin (LMP), right anterior chin (RMA), right lateral chin (RMT) and right posterior chin (RMP).

(3) breech position

The breech position refers to the position of the fetus in the uterus, with the hips down and the head up, just like sitting up. Generally, the buttocks enter the pelvis first, and the sacrum is used as an indicator to connect all directions of the pelvic entrance to determine the fetal position. The longitudinal axis of the fetus is parallel to the longitudinal axis of the mother, and the position where the buttocks first enter the pelvic entrance is called breech position, also known as breech position. Generally, it is also divided into six directions, namely left anterior sacrum (LSA), left lateral sacrum (LST), left posterior sacrum (LSP), right anterior sacrum (RSA), right lateral sacrum (RST) and right posterior sacrum (RSP).

(4) lateral position

Transverse position means that the fetus lies flat at the entrance of pelvic cavity, so the fetal head can't be put into the basin. Generally, the shoulder is exposed first, and the fetal position is determined by the scapula. The longitudinal axis of the fetus is perpendicular to the longitudinal axis of the mother, and the position where the shoulder first emerges at the pelvic entrance is called transverse position, which is also called "shoulder first emerges". Generally, it is divided into four directions, namely the left front shoulder (LScA) and the left rear shoulder.

(LScP), right front shoulder (RScA) and right rear shoulder (RScP).

(5) Fetal malposition

Common fetal position abnormalities include breech position, transverse position and head position abnormality. Generally, you can find it as long as you do prenatal examination according to regulations. Don't panic when you find that the fetal position is not correct. It can generally be adjusted by taking good measures. However, if the fetal position is still incorrect (about 5%) near delivery, you can seek the assistance of a doctor. Transverse fetus must be delivered by cesarean section.

2, the harm of polyhydramnios

Polyhydramnios is often accompanied by the basic diseases of the mother or fetus, so it will have adverse effects on the mother and fetus. Hyperhydramnios can cause excessive dilatation of placenta and increase obstetric complications, such as maternal dyspnea, premature delivery, premature rupture of membranes, abnormal fetal presentation, umbilical cord prolapse, postpartum hemorrhage, placental abruption, pregnancy-induced hypertension and urinary tract infection. The risk of these complications varies with the cause of polyhydramnios.

Polyhydramnios not only affects the health of perinatal mothers and fetuses, but also has a long-term impact on the growth and development of children. A retrospective cohort study published in Pediatrics showed that hydramnios during pregnancy diagnosed by ultrasound not only increased the risk of cesarean section and macrosomia, but also significantly increased the risk of fetal malformation, hereditary diseases, neurological dysfunction and developmental retardation after birth.