Occurring in pregnancy of important changes affecting various concentrations of female hormones.
Asthma in childhood affects more males. In contrast, during puberty more women develop asthma for the first time. Although we do not know exactly what happens, it is clear that hormones play an important part in asthmatic disease.

During pregnancy many changes occurring hormone and, in parallel, many women also reported changes in their asthmatic disease: for most of them asthma improves, not to give up more disturbances in a few cases, however, reportedly worsening.

In the latter case there is a clear indication to adjust drug therapy in order to obtain a good control of respiratory function: So, do not worry about taking medicines needed thinking that might hurt the fetus: the child will stay course better if the mother breathes well! Moreover, it is almost always to use drugs in spray formulation, which are safe for the fetus.