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A   Controlled studies show no risk
Adequate, well-controlled studies in pregnant women have failed to demonstrate risk to the fetus
B No evidence of risk in humans
Either animal findings show risk (but human findings do not) or, if no adequate human studies have been done, animal findings are negative.
C Risk cannot be ruled out
Human studies are lacking and animal studies are either positive for fetal risk or lacking as well. However, potential benefits may justify the potential risk.
D Positive evidence of risk
Investigational or postmarketing data show risk to fetus. Nevertheless, potential benefits may outweigh the risk.
X Contraindicated in pregnancy
Studies in animals or humans, or investigational or postmarketing reports have shown fetal risk which clearly outweighs any possible benefit to the patient. Stay up to date with 247 ASAP locksmith.