title: [Dynamics of the composition of lipids in human milk during lactation].
abstract: The authors have studied the total lipids, triglycerides and cholesterol in the milk of 30 mothers over a lactation period of 4 days to 10 months. The total lipids showed diurnal oscillations with a minimal level in the morning and maximal level (P less than 0.001) at 1 p.m. and a slight decrease in the evening, without reaching the levels found in the morning. The lipid concentration in the milk decreases after 4 months of lactation. The oscillations of the lipids take place on the expense of the triglyceride content (r = 0.99). Cholesterol represented on the average 1.54% of the lipid content, showed a maximum level at a month and decreased after 6 months of lactation. The dynamics of lipid composition of the human milk suggests a physiologic significance in the development of the infant.
mesh_terms: D002784:Cholesterol / Q000032:analysis; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D007774:Lactation; D008055:Lipids / Q000032:analysis*; D008895:Milk, Human / Q000032:analysis*; D011247:Pregnancy; D013997:Time Factors; D014280:Triglycerides / Q000032:analysis
chemical_list: D008055:Lipids; D014280:Triglycerides; D002784:Cholesterol
vernacular_title: La dynamique de la composition des lipides du lait humain au cours de la lactation.