29-week preterm babies can usually breathe on their own after 1~2 weeks, but it is not absolute, each preterm baby’s physical development is different, and the time to be able to breathe on their own is also different. Gestational age of 37 full weeks before the birth of a live baby is called preterm infants, preterm infants lung function is not well developed, breathing fast and shallow, often irregular intermittent respiration or apnea, can not breathe on their own, through the ventilator to assist breathing. 29 weeks premature babies born too early, usually can not regulate and control their own breathing, first rely on the ventilator to maintain breathing, about 1 ~ 2 weeks to gradually establish normal independent breathing. This time is not absolute, each preterm baby’s physical condition is different, gestational weeks of preterm babies, may also be through the ventilator to maintain the full-term gestational age before independent breathing. How long it usually takes for a 29-week preterm baby to breathe on its own depends on the development of the fetus to consult the doctor.