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Summary Fertility in New Guinea highlanders was lower than in the Karkar coastal population. Karkar fertility has been reduced in younger women and this appears to be associated with increased educational opportunity. Polygamy is common in the Highlands but unusual on the coast. Fertility appeared to be unrelated to religious affiliation or employment status. Both communities had some knowledge of contraception, abortion and fertility promotion, and on Karkar there was a knowledge of the advantages of medical advice concerning family planning. Mortality levels in the two communities were comparable, from the mid-trimester of pregnancy through early childhood. The estimated life expectancies at birth are within the accepted range for other areas of New Guinea.
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