The study presents a clinical explanation of how breastfeeding inhibits or regulates fertility and tries to ascertain how the return of fertility can be predicted during breastfeeding so that its natural contraceptive benefit can be relied upon with more confidence. This is done by examining the results of surveys conducted simultaneously in Pakistan, Philippines and Thailand in 1989. Although the results do not refute the relationship between intensive breastfeeding and maximum protection from pregnancy, the results were modest and do not add support to the premise relating frequent breastfeeding with infertility, nor is it successful in defining the breastfeeding correlates of infertility.
