The survival rate of preterm birth must be related to the gestational week of delivery, the lower limit of preterm birth in our country is more than 28 weeks, and the child born at 28 weeks is called preterm baby, some countries are 24 weeks, and some countries are 20 weeks. Of course, it is related to the attitude towards children, as well as the level of medical treatment, and so on.
From the gestational week, the birth of less than 24 weeks is not called premature birth, but called abroad, less than 24 weeks may not be able to survive, the vast majority of the surviving half will have ischemic hypoxic encephalopathy, legacy sequelae may be more. As the gestational age increases, of course, this risk will become smaller and smaller.
It is generally believed that below 30 weeks must be to do everything possible to protect, weigh the situation of adults, try to guarantee the insurance, why? For every extra day spent in the womb for less than 30 weeks, after birth, the probability of survival of premature babies increases by 3%, so below 30 weeks is really calculated by day, and one more day is the possibility of victory. After more than 30 weeks, the complication rate of the four more serious premature babies gradually decreased. So more than 30 weeks, according to the mother's condition, of course, is also as far as possible, 30 weeks is a hurdle. Children born at 32 weeks, serious complications, and full-term children have no statistical differences, that is, leftover ischemic hypoxic encephalopathy, and there are no intellectual problems, so there are so many hurdles stuck here.
There is also a saying in the world, such as taking 25 weeks as a boundary, children under 25 weeks, neurological sequelae, cerebral palsy incidence will be very high. In terms of weight, if a child is born more than 1600 grams, the mortality rate may be relatively small, and the 1900 grams of children will also reduce various complications a lot. So one is measured from gestational age, and one is measured by weight. A child greater than 1900 grams, it is estimated that this premature baby should have almost four pounds, in fact, there is no need to die, because the condition after birth should be better.