Your body is building a second skeleton — and every day of your pregnancy, your baby draws on calcium and vitamin D to make it strong. But pregnancy changes what your body needs, how it absorbs those nutrients, and what happens to your own bones before and after birth. This practical, reassuring guide walks you through the science in plain language: how calcium and vitamin D work together, how much you really need, which foods deliver the most, and how to meet your needs whether you eat dairy, follow a plant-based diet, or need supplements. You'll learn what to look for on a label, how to get vitamin D from sunlight without risking a burn, and how breastfeeding shapes your bones after birth. Every chapter gives you clear, actionable steps — and honest advice about when to call your midwife or doctor. Written for tired, busy, anxious parents, this guide offers steady, judgment-free support: no dogma, no scaremongering, just straight answers. Part of The Pregnancy Companion Library.