Every drug has a pregnancy safety category, labeled category A (being proven safest), up to D. Any drug has a measure of 'risk'. Even coffee is considered to be in category B during pregnancy, to put it in perspective. But thousands of women have safely drank coffee throughout their pregnancies.
With Cf and pregnancy it all comes down to a risk/benefit ratio. You may have to take a tiny tiny risk to get protection during the pregnancy. For example, albuterol is a pregnancy category C drug bc animal studies have shown possible bad effects to a growing fetus. However, if a pregnant woman has an asthma attack it could permanently damage a growing baby. Taking the drug and taking that slight chance would be MUCH safer than harming your lungs-your baby needs lots of oxygen, from healthy lungs, to thrive.
I took pulmicort and pancreaze throughout both pregnancies and delivered full term healthy kids. I may add, pancreaze is a must! The baby won't grow properly if you aren't getting nutrition. Omg. There is no way a pancreatic insufficient woman could nourish a growing baby without enzymes.
Here's the meds I took during both pregnancies:albuterol, hypertonic, pulmozyme (after the 2nd trimester began), pulmicort as needed, protonix (for reflux), zithromax (after the 2nd trimester), ceftin as needed, and 1 course of prednisone late in my 3rd trimester (bc I got a bad cold).
I will add that if you suspect you are pregnant, try to take a test right away. Then discuss the treatment plan with your doctors. Don't start or stop taking anything bc of it until you go over everything together. There are plenty of safe medication options for pregnant cfers. Even some IV meds are safe for pregnancy.
And if you aren't pregnant, but considering it, it is not wise to just let it happen. You need a treatment plan of sorts. You want a low stress pregnancy. A healthy mommy=healthy baby.