Transitional milk is high-protein breast milk that a woman produces
about 3 to 6 days after her baby is born. A woman's breasts are stimulated to
produce transitional milk by breastfeeding her baby regularly, about every 2
The breasts make transitional milk after a period of producing
colostrum, which is a thick, sticky, yellowish liquid that contains important
nutrients and antibodies that a baby needs right after birth. After a mother's transitional milk comes in, she typically notices a big change in the volume and type of milk and an increase in
the weight and size of her breasts.
Mature milk, which has more fat and less protein than transitional
milk, starts being produced about 10 to 15 days after the baby is born.
Sarah Marshall, MD - Family Medicine & Kirtly Jones, MD - Obstetrics and Gynecology
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