Final answer:
Category A rating indicates that the drug has a low risk of causing harm to the fetus during pregnancy.
Step-by-step explanation:
When a drug is given a pregnancy category A rating, it means that the drug has been determined to have a low risk of causing harm to the fetus during pregnancy. This rating is assigned by the U.S. Food and Drug Administration (FDA) based on available data from human studies.
Drugs in pregnancy category A have been studied in pregnant women and have not shown any evidence of harm to the fetus. Examples of drugs in this category include folic acid, prenatal vitamins, and some antibiotics.
It is important to note that every medication carries some level of risk, and pregnant individuals should always consult with their healthcare provider before taking any medication.