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Breast feeding in infancy and social mobility: 60-year follow-up of the Boyd Orr cohort
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  • Published on:
    Plausible, but probably smaller and of doubtful contemporary relevance

    Dear Editor,

    The effect reported by Martin and colleagues is plausible, but likely to be smaller than suggested and of doubtful contemporary relevance.

    The effect of breastfeeding is relative to the alternatives available which clearly are very different now from the 1920’s and 30’s when the Boyd Orr cohort were born. Although its use was declining, some of the artificially fed might have been given condens...

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    Conflict of Interest:
    None declared.
  • Published on:
    This could be due to increased DHEA

    Dear Editor,

    Milk contains maternal prolactin, which has been linked to positive growth and development of the neonate (J Mammary Gland Biol Neoplasia 1996; 1: 259-69). Prolactin has been determined to specifically stimulate dehydroepiandrosterone (DHEA) production in young baboons (Endocrinology 1985; 117: 1968-73). Breast feeding augments a neonates natural prolactin levels.

    It is my hypothesis that all...

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    Conflict of Interest:
    None declared.