Can a big ass represent a baby?

Generally speaking, there are four factors that determine the difficulty of production: factor one: pelvis.

The pelvis consists of sacrum, coccyx and two hip bones (fused by ilium, ischium and pubis).

There are strong ligaments between sacrum and ilium, sacrum and coccyx, which form joints and generally cannot move. After pregnancy, under the action of hormones, the ligaments are slightly relaxed and the joints are slightly loose, which is conducive to childbirth. The connecting line between the bilateral iliopubic line and the upper edge of the sacral promontory forms the pelvic "pelvic boundary". This boundary divides the pelvis into upper and lower parts, the upper part is the big pelvis or pseudo pelvis, and the lower part is the small pelvis or true pelvis (pelvis for short). The large pelvis can support the enlarged uterus during pregnancy, but it has nothing to do with delivery. Clinically, by observing the shape of the large pelvis and measuring some diameter lines, we can indirectly understand the real pelvis.

The pelvis is composed of the innominate bone (surrounded by intestine, ischium and pubic bone), sacrum and coccyx, which is the "birth canal".

The most important method to evaluate pelvic capacity is:

1. Obstetric diameter at entrance.

2. The distance between the ischial spines.

3. The distance between the inferior pubic horn and the two nodules.

4. Sagittal diameter behind three planes (entrance, middle and exit).

5. Flexibility and length of sacrum.

The scope of these objective assessments can only be measured by pelvic radiography. However, radiation exposure may increase the chances of children suffering from blood tumors in the future, so it is not widely used. Generally speaking, this kind of examination will only be considered if the progress of labor is slow. Or according to clinical judgment and ultrasound examination, it is necessary to adopt caesarean section to determine whether there is asymmetry between fetal head and pelvis.

Because women's pelvis and the plane of each pelvis vary greatly, it is impossible to classify the pelvis rigidly. For practical needs, according to the shape of the pelvic entrance, we can divide the pelvis into:

1. Female, that is, round or oval.

2. Male, that is, heart or wedge.

3. Ape-like style, that is, long oval before and after.

4. Flat, that is, transverse oval, but the front and rear diameters are very short.

Of these four types of pelvis, "female type" and "ape type" are more conducive to childbirth. Both "male" and "flat" are not conducive to vaginal delivery. Of course, the shape of the pelvis is invisible to the naked eye, and the idea that a big ass will have children is just speculation. Factor 2: Fetus

Postpartum posture, mode, posture, body position, head circumference, chest circumference, number of fetuses and fetal health may all affect the progress of labor and the mode of production. If the fetus weighs more than 4000 grams, it will increase the chance of dystocia.

At present, many pregnant women gain 5 kilograms just after pregnancy, but their weight gain has far exceeded the normal standard before the second trimester of pregnancy. Most of them pay too much attention to nutritional intake after pregnancy. They eat a lot more than before, and eat a lot of sweet, high-fat and high-starch foods. The purpose is to fatten the fetus in their stomachs. If the fetus is too big, you can only choose caesarean section. Although caesarean section is not dangerous, it is an operation for the parturient after all, which may cause uterine adhesion. If you want to have an abortion operation in the future, the difficulty will increase. In addition, too big babies are more likely to suffer from diseases such as obesity and diabetes than ordinary children in the future. Factor 3: Contractility of uterus.

At present, we still don't know the real mechanism of starting childbirth. Under normal circumstances, about 40 weeks of pregnancy may be caused by the stretching of the uterus to a certain extent, the stimulation of the cervical plexus, the production of special hormones by the placenta, the decrease of estrogen and organic lutein in the blood, and physiological or psychological factors.

Simply put, during childbirth, the uterus begins to contract regularly. The pain in the early stage of uterine contraction is a bit like dysmenorrhea. Some people may feel pain when diarrhea gets worse, and some pregnant women may also feel back pain. In short, everyone's situation is slightly different.

The parturient will feel that every contraction is from weak to strong, and will gradually weaken or even disappear after a certain period of time. After that, the interval between two contractions gradually shortened and the duration of contractions gradually prolonged. This is uterine contraction before delivery, also called labor pains.

Uterine contractions initially occur every 20-30 minutes, and gradually shorten to every 65,438+05 minutes, 65,438+00 minutes or even every 5 minutes. The duration of uterine contraction increased from the initial 20 seconds to 40 seconds or even 65,438 0 minutes. Simply put, during childbirth, the uterus begins to contract regularly. The pain in the early stage of uterine contraction is a bit like dysmenorrhea. Some people may feel pain when diarrhea gets worse, and some pregnant women may also feel back pain. In short, everyone's situation is slightly different.

The parturient will feel that every contraction is from weak to strong, and will gradually weaken or even disappear after a certain period of time. After that, the interval between two contractions gradually shortened and the duration of contractions gradually prolonged. This is uterine contraction before delivery, also called labor pains.

Uterine contractions first occur every 20-30 minutes, and gradually shorten to every 15 minutes, 10 minutes or even every 5 minutes. The duration of uterine contraction increased from the initial 20 seconds to 40 seconds or even 65438 0 minutes.

The intermittent time, duration and intensity of uterine contraction are regular. With the shortening of the intermittent time and the extension of the duration of uterine contraction, the intensity of uterine contraction will continue to increase, and the delivery time of parturient is approaching. Under the action of uterine muscle contraction, the fetal membrane is broken, and the oppressed fetus cannot stay in the uterine cavity, so it has to move slowly to the cervix, and the cervix begins to expand and discharge the fetus.

If the contraction force is too strong, the short labor process will cause laceration of the birth canal; If the labor process is too long, it means that the uterine contraction is not good or the fetus does not match the pelvis. It should be handled in time and caesarean section should be done if necessary.

Factor four, psychological factors

Although childbirth is a natural physiological phenomenon, it is a huge physiological change and psychological stimulation for pregnant women after all. According to the survey, what women are most afraid of is the pain of childbirth, followed by massive bleeding and dystocia. The fear of pregnant women before labor can inhibit uterine contraction through the central nervous system, resulting in uterine contraction weakness and prolonged labor. Emotional stress causes the excitement of sympathetic nerve-adrenaline system, the release of catecholamine, the increase of peripheral artery resistance, the increase of blood pressure, fetal ischemia and hypoxia, resulting in fetal distress. The emotional stability of pregnant women is an important factor affecting dystocia. According to research, the dystocia rate of pregnant women with emotional instability is higher than that of pregnant women with emotional stability. Pregnant women with emotional instability often have a long labor process or irregular contractions.

In order to ensure the emotional stability during delivery, pregnant women should know the relevant knowledge of delivery during pregnancy, so as to understand the situation of each labor process, eliminate the fear of delivery, and actively cooperate with doctors to carry out delivery smoothly.