| Titre : | Breast volume and milk production during extended lactation in women (1999) |
| Auteurs : | JC Kent, Auteur ; L Mitoulas, Auteur ; Pe Hartmann, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Experimental physiology (Vol.84 n°2, Mars 1999) |
| Article en page(s) : | pp.435-447 |
| Langues: | Anglais |
| Index. décimale : | PH.1.1 (Lactation) |
| Catégories : | Durée de l'allaitement ; Lactation ; Poids corporel ; Sein |
| Résumé : | Quantitative measurements were made of relative breast volume and milk production from 1 month of lactation until 3 months after weaning, and the storage capacity of the breasts was calculated. The increase in breast tissue volume from before conception until 1 month of lactation was maintained for the first 6 months of lactation (means+/-S.E.M.) (190.3+/-13.1 ml, number of breasts, nb = 46). During this period of exclusive breast-feeding, 24 h milk production from each breast remained relatively constant (453.6+/-201 g, nb = 48), and storage capacity was 209.9+/-11.0 ml (nb = 46). After 6 months, breast volume, milk production and storage capacity all decreased. There was a relationship between 24 h milk production and the storage capacity of the breasts, and these both appeared to be responding to infant demand for milk. At 15 months of lactation, the 24 h milk production of each breast was substantial (208.0+/-56.7 g, nb = 6), even though the breasts had returned to preconception size. This was associated with an apparent increased efficiency of the breast (milk production per unit breast tissue) after 6 months, which may have been due to redistribution of tissues within the breast. The possible causes of the decrease in breast volume are discussed. |
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