Why is contraceptive use inversely associated with lactational amenorrhoea? Qualitative and quantitative insights from Bangladesh

Over the past 15–20 years observations in many parts of the world have revealed a negative association between the natural protection afforded by lactational amenorrhoea and contraceptive uptake. This paper uses qualitative and quantitative data to explore the possible explanations for this nagative association in two Bangladeshi populations, one urban and one rural. The findings suggest that a subconscious substitution of contraceptive protection for natural protection against pregnancy is the most likely explanation. It appears that shorter durations of exclusive breastfeeding have led to earlier resumption of menses which in turn prompts the use of contraception. However, other mechanisms appear to play a subsidiary role, at least in the rural population. Moreover, changes in breastfeeding cannot be viewed as totally independent of the promotion of modern family planning. Evidence suggests that family planning staff are poorly equipped to support breastfeeding, and may often encourage the early introduction of supplements. There is a need to consider ways of promoting exclusive breastfeeding as well as ensuring ready access to contraception when fecundity resumes postpartum. Only such an integrated approach is likely to ensure that both negative effects on child health and unwanted pregnancies are avoided.