A potentially serious medical problem that occurs in approximately 8% of pregnant women.
Patients have a higher risk of preeclampsia, preterm birth, infants with low birth weight, intrauterine growth restriction, infants with congenital malformations, and perinatal death.
Between 1 and 4% of pregnancies are complicated by poorly controlled asthma.
Approximately one-third of women experience worsening of their asthma during pregnancy, another third experience the same severity of asthma, andi in the remaining third the severity improves.
Patients with moderate or severe asthma experience more acute exacerbations with pregnancy.
Approximately 10% of pregnant women with asthma have an exacerbation during labor.