Use is not recommended unless the benefit outweighs the risk to the fetus

AU TGA pregnancy category: B3
US FDA pregnancy category: C

Comments:
-Asthma should be closely monitored and medication adjusted as necessary to maintain optimal asthma control in pregnant women.
-Infants exposed to corticosteroids in utero should be observed for signs and symptoms of hypoadrenalism.

See references

Benefit should outweigh risk

Excreted into human milk: Unknown
Excreted into animal milk: Yes

Comment: Inhaled corticosteroids are generally considered acceptable to use during breastfeeding as the amount, if excreted into breastmilk, would probably be too small to affect a breastfed infant.

See references