The clinical manifestations of preterm birth, of course, the most important is contractions, there may also be some vaginal bleeding, redness, or more out, in fact, the main two.
But here we must first distinguish, because in the whole process of pregnancy, there is a kind of contraction called allergic contractions, not serious contractions, not effective contractions, will not cause cervical expansion, resulting in premature labor, and this contraction, with the increase in gestational age will become more and more obvious, so some pregnant women always feel a burst, the stomach is swollen and hard, but in fact it does not hurt. This contraction is characterized by swelling and hardness, but it is not painful, there is no feeling of acid, so it is not an effective contraction.
Under what circumstances does this contraction mostly occur? For example, when lying down and turning over, when the position changes, or walking is particularly much, or touching the stomach, there is a stimulus to the abdomen, in such a case, the uterus suddenly hardens, a situation like this is called allergic contractions. Therefore, when many pregnant women come, they say that there is contractions, and the doctor must first distinguish this, otherwise it may be over-diagnosed and over-treated. Because pregnant women do not understand, she feels uncomfortable in the stomach, a burst, but in fact it may be such a situation, to rule out this situation, really contractions, but also accompanied by pain, but also falling, the key is to lie there without moving, but also a bout of contractions, may be real contractions. This is a basic manifestation, of course, there are some people, may have a situation of seeing red.
Of course, from the definition of preterm birth, there are still some provisions, either a stomachache is premature birth, or a precursor premature birth, so our definition, has always been so defined, preterm birth must first have a regular uterine contraction, but also accompanied by cervical changes, that is, the regression of the cervical canal, and the gradual expansion of the uterine opening, these conditions are available, is called preterm birth. In fact, normal labor, full-term delivery is also like this. First of all, regular contractions, what is regular contractions? It is a burst of very regular, at least seven or eight minutes once, sixty minutes within eight times, or twenty minutes in the first four or five times, that is, five to seven minutes to a contraction, this is very regular, and then the cervix to gradually fade, gradually shortened, about 80% of the consumption, the uterine orifice is also expanded, called premature birth.
Maybe there has been no labor before, but can not be diagnosed is a precursor premature birth, first of all, there must be contractions, regular contractions, but the cervix may not have obvious changes, but at least there should be withdrawal, may not be dilated, but at least there is a shortening, especially less than 2 cm long, can be considered as a precursor premature birth.