The sho retroviral regime administration in the peripaum period decreases the risk of veical transmission by:

Shoer, more practical regimens staing later in pregnancy have been shown to reduce peripaum transmission by 40-50%. Ref: Aicle: Prevention of Mother-to-Child Transmission of HIV: Challenges for The Current Decade, 2001, Marie-Louise Newell1 ; Textbook of Obstetrics By Dutta, 6th Edition, Pages 300-302 ; Williams Obstetrics, 21st Edition, Page 1502 ; Harrison's Principles of Internal Medicine, 15th Edition, Pages 1858, 1901