When a pregnant woman is having asthma medication during pregnancy, the most frequent question is whether it will affect the baby. This condition can be under control during the nine months. Do not leave your medications because most of them do not affect the baby, just ask the doctor about them. It would be worse to leave them and have a serious asthma attack after that. The ways asthma affects pregnant women are different from person to person. If your asthma gets worse during pregnancy, the symptoms tend to worsen in the last three months, but return to normal three months after the baby is born.