Pregnant women awaiting delivery in the Department of Obstetrics and Gynecology will be screened for eligibility (as per the Inclusion and Exclusion criteria). Women whose infants are likely to be eligible for participation in the study will be explained about the nature and purpose of the study prior to delivery. They will be informed about the study protocol and invited to participate. After delivery, mothers and their respective newborn babies, will be enrolled with written, informed consent.