Pregnancy can cause asthma to change. For one-third of women with asthma, pregnancy will make their asthma worse. Coughing when you laugh may mean that your mild asthma is not under good control. Please read our Asthma and Pregnancy MedFact at http://asthma.nationaljewish.org/living/pregnancy/index.php for more information. Share this information with your doctor to be sure that your asthma is well controlled during your pregnancy so that both you and your baby are getting the oxygen that you need.
i don't have asthma but have a small amount of damage in my right middle lobe from a bacterial infection.
I never cough except when i laugh, i don't know why though.
Maybe it moves the small amount of phlehm in the airways when you laugh. Just a guess.
lisa