Maternity dungarees are a must: they're comfortable, practical, and a godsend on days when a waistband digging in just feels like hell. When it comes to the very best, Seraphine Denim Maternity Dungarees (£59) fit true to pre-pregnancy size, have just the right amount of stretch, and come with adjustable buttons on the hips so they'll fit right through to 40 weeks.