23-year-old GIRO woman at 10 weeks' gestation presents to the obstetrics clinic for her initial evaluation. She says she has been hospitalized several times for asthma exacerbations but has never required intubation or admission to an intensive care unit. She is controlled on daily inhaled coicosteroids and albuterol with adequate relief of her symptoms. She Is concerned about taking these medications now that she is pregnant. Which of the following is true regarding asthma medications in pregnancy?