Lipitor is a medication used to lower cholesterol levels in the blood and prevent heart disease. The active ingredient in Lipitor is atorvastatin. While the drug is generally safe for most people, it may cause some side effects. The sources provided do not mention any birth defects associated with Lipitor. However, the use of statins, including Lipitor, during pregnancy is not recommended due to potential harm to the fetus [2]. Statins can cross the placenta and cause fetal harm, such as developmental delay, skeletal abnormalities, and neural tube defects [3]. Therefore, women who are pregnant or planning to become pregnant should not take Lipitor or any other statin medication without consulting their healthcare provider. Additionally, women of childbearing age who take Lipitor should use effective contraception to avoid unintended pregnancy while taking the medication [2].

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://utswmed.org/medblog/statins-pregnancy-familial-hypocholesteremia/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2048566/