What do the following FDA safety categories mean? -C? -D? -X? At what gestational age is the greatest teratogenic risk?
a) Category C: Risk cannot be ruled out; Category D: Positive evidence of risk; Category X: Contraindicated; First Trimester
b) Category C: Safety not established; Category D: Positive evidence of risk; Category X: Proven risk; Second Trimester
c) Category C: No risk in animal studies; Category D: Positive evidence of risk; Category X: Contraindicated; Third Trimester
d) Category C: Benefits outweigh risks; Category D: Positive evidence of risk; Category X: Proven risk; Throughout Pregnancy