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Histological changes in breast tissue that characterize recent pregnancy

In previous studies of the normal ‘resting’ human breast, we have been unable to detect differences in lobules from parous and nulliparous women (Anderson, Ferguson & Raab 1982). However, on examination of breast tissue from a large number of women as part of an autoradiographic study of the ‘resting’ breast (Battersby et a[. 1988) we have identified a distinctive involutional morphological appearance, which is associated particularly with recent full term pregnancy.