Final answer:
Insulin, Regular (Humulin R) is categorized as Category B in terms of pregnancy.
Step-by-step explanation:
The Pregnancy Category for Insulin, Regular (Humulin R) is Category B. Pregnancy Category B drugs have been shown to have no risk to the fetus in animal studies, but there are no adequate and well-controlled studies in pregnant women. However, potential benefits may outweigh the potential risks in certain situations based on individual patient considerations