The preterm baby seven live eight not live, is a folk saying, medical does not support such a view, from the literal analysis of the approximate meaning is that the gestational age of seven months preterm baby can live, while the gestational age of eight months preterm baby can not survive, this statement has no scientific basis, modern medicine more than eight months of the fetus than seven months easier to survive some. In general, the older the gestational age, the more mature the fetus will be and the more mature the fetus will be in the mother’s body, the greater the probability of survival. In contrast, a fetus delivered in the eighth month of pregnancy is more mature and has better developed systems in all aspects of the body, so it is usually easier to survive than a premature baby born in the seventh month of gestational age, especially for important organs such as the heart and brain, which are generally more developed in the eighth month than in the seventh month, so it is usually easier for an eighth-month fetus to survive than a seventh-month one. But the fetus delivered after seven months of pregnancy is also premature, but all the organs of the body have basically developed, and at this time the premature baby already has relatively perfect respiratory function, with the basic conditions for survival, through the assistance of some medical means, most premature babies can survive. However, for preterm babies, although they have a chance of survival, compared to full-term babies, their gestational age is small, their weight is light, their physique is poor, and they are prone to other diseases, so they need to stay in a warm box for a while or use a ventilator to assist in breathing.