It’s the period in which each breast settles into the pocket. At first they’ll be swollen and normally sit with quite a high projection, then over a few weeks each one ‘drops and fluffs’ in it’s own pace. You’ll notice the changes and taking weekly pictures really helps. For me personally, mine were extremely swollen and the right sat a lot higher than the left.. Then as they settled the size changed and they eventually looked very similar and now sit nicely and look ‘natural’. Hope this helps a bit! 🙂 xo