Articles were selected for this review by using predefined
selection criteria: (a) studies using English language; (b)
published articles in peer-reviewed journals that reports
on the implementation of teenage pregnancy prevention
strategies; (c)research reports or official reports of
government agencies or non-governmental organisations
that reports teenage pregnancy intervention programmes
that were implemented; (d) official or non-official
documents that reports teenage pregnancy intervention
programmes that were implemented in specific locations
with specific goals and objectives; and lastly, reports that
deals with teenage pregnancy intervention programmes
which were either school or community-based, with
specific outcomes, such as sexual and contraceptive
behaviours, relationship education and pregnancy rates.
The following categories of publications were excluded
from the review: (a) previous literature reviews, even if
reference was made to teenage pregnancy prevention
strategies and programs; (b) official and non-official
reports that relates to teenage pregnancy prevention
strategies without any evidence of implementation; and
published articles in peer-reviewed journals on teenage
pregnancy intervention without any evidence of
implementation.