Can pregnant women 20weeks take becotide (corticosteroid) inhaler for allergy?

Probably: Although there has been no proof that inhaled steroid is harmful for the fetus, budesonide is the only one considered category B for pregnancy. At 20 weeks, most if not all of the fetus' organs are fully formed and thus it is doubtful that much can affect its development. Regardless , losing asthma control poses a much higher risk for both the mother and the baby. Ask for budesonide if worried.