Final answer:
Zidovudine (Retrovir) is the anti-HIV drug given to HIV-infected pregnant women to prevent transmission of the virus to the infant.
Step-by-step explanation:
The anti-HIV drug given to HIV-infected pregnant women to prevent transmission of the virus to the infant is zidovudine (Retrovir). Rates of mother-to-child transmission can be reduced by giving antiretroviral medications to the mother during pregnancy and to the infant after birth. Zidovudine is an antiretroviral medication commonly used for this purpose.