Why would uncontrolled asthma affect the fetus?
Uncontrolled asthma causes a decrease in the oxygen content in the mother’s blood. Since the fetus gets its oxygen from the mother’s blood, decreased oxygen in her blood may lead to decreased oxygen in the fetal blood. This can lead to impaired fetal growth and survival. The fetus requires a constant supply of oxygen for normal growth and development. In some cases, women with asthma have had increased rates of prematurity and smaller babies.