Lipitor is a medication used to treat high cholesterol levels. According to Drug Patent Watch [1], there is no indication of any birth defects associated with Lipitor. However, Lipitor is not recommended for use during pregnancy as it may cause harm to the fetus [3]. A study published in the National Center for Biotechnology Information [2] found that exposure to atorvastatin, the active ingredient in Lipitor, during pregnancy may increase the risk of fetal malformations. The American Pregnancy Association [3] advises that women who are pregnant or planning to become pregnant should not take Lipitor or any other statin medication unless advised by a healthcare provider. It is important for women who are taking Lipitor and become pregnant to consult their healthcare provider immediately to discuss the potential risks and benefits of continuing or discontinuing the medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2048566/
[3] https://americanpregnancy.org/healthy-pregnancy/medication/atorvastatin-during-pregnancy/