An accurate knowledge of the position of the fetus in the uterus is of great importance for practical obstetrics. It is achieved by examining a woman at the end of pregnancy, when it is possible to determine the fetal member, its position, presentation, position and appearance.
Hymenoid (habitus) - refers to the relationship of the limbs of the fetus and the head to its trunk. With the most favorable member of the rhizome, the ridge is slightly curved, so that the back is curved outward, the head is bent, and the chin is close to the chest. The legs are bent in the hip and knee joints, crossing and are pressed to the lower abdomen. The handles are bent at the elbow joints and crossed on the chest.
The position of the fetus is (situs) - called the ratio of the axis of the fetus to the axis (debtor) of the uterus. Here is the fruit - a line that passes through the back of the head and buttocks. There may be the following variants of the fetal position:
- The axis of the fetus coincides with the debtor of the uterus - the longitudinal position (situs longitudinalis) - observed in 99% of cases;
- The axis of the fetus intersects with the debtor of the uterus - the transverse (situs transversus) or oblique position of the fetus (situs obliguus).
The position of the fetus is (positio) - refers to the ratio of the fetal back to the left (AND position, 2/3 of the cases) or right (II position, Y3 cases) of the uterine wall. In the transverse position of the fetus, the position is determined by the location of the head.
Item type (visus) - the ratio of the frontal back to the anterior or posterior wall of the uterus. At a forward kind the back of a fruit is directed to a forward wall of a uterus, at a back kind - to a back wall of a uterus.
Presentation of the fetus (presentatio) - is the ratio of the low placed large part of the fetus to the entrance to the pelvis (superior or pelvic presentation).
The data given on the placement of the fetus in the uterine cavity are found in the most nairobes ratios.