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Pregnancy & preparation

Pregnancy: Where your breast milk starts

Time to read: 1 min.

How do your breasts change during pregnancy? And when do they start making milk for your baby? Our video explains what’s going on.

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Discover what makes your breasts unique human organs, and how it’s only during pregnancy and lactation that they become fully mature. We’ll show you how your breast structure changes, with a complex web of branching milk ducts forming within it, and special tissue converting into milk-producing cells. We reveal just how much your breasts might grow while you’re pregnant – and the truth about the relationship between how much milk you make and your bra size!

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  • Pregnancy
  • Breastfeeding
  • Pumping