Well this is the information I have, my husband works in medicine.
Celexoxib (celebrex) has caused birth defects in animal studies. Any nsaid may afect fetal heart development during the second half of pregnancy. Pregnant women should not take celecoxib (celebrex) with their doctors's approval. When this drug is considered crucial by your doctors, its potential benefits must be carefully weighed against its risks.
Nsaids may pass into breast milk. Thre is a possibility that a nursing mother taking celecoxib (celebrex) could affect her baby's heart or cardiovascular system. Nursing mothers who must take this drug shoul bottle-feed.