Which statement regarding pregnancy and asthma is accurate?
A) Progesterone causes smooth muscle relaxation, which can worsen asthma symptoms.
B) Poorly controlled asthma has been associated with an increased incidence of spontaneous abortion.
C) A decrease in peak expiratory flow rate (PEFR) of more than 20% of the patient's personal best requires a visit to the emergency room.
D) It is estimated that approximately two thirds of patients will have worsening of asthma symptoms.

Question

Quizplus · Accepted Answer

Poorly controlled asthma during pregnancy has been associated with an increased incidence of spontaneous abortion.The lessening of asthma symptoms during pregnancy is the result of smooth muscle relaxation caused by progesterone.A decrease in peak expiratory flow rate (PEFR)of more than 20% of the patient's personal best requires a call to the physician; a decrease to of greater than 50% of the patient's personal best signals the need for a visit to the emergency department and the need for rapid assessment and intervention.It is estimated that approximately one third of patients will experience no change in asthma symptoms,one third will see improvement,and one third will have worsening of symptoms.

Which Statement Regarding Pregnancy and Asthma Is Accurate