[Selenium contents in human milk after term and preterm labor and in breast milk substitutes].

Selenium contents in breast milk of Russia's and Vietnam's women after term and preterm childbirth and in breast milk substitutes were studied. The concentration of selenium in breast milk of Russia's women was normal after term and preterm childbirth. The level of selenium in breast milk of Vietnam's women was decreased and could not satisfy completely the need of breasted infants.