This dress has nursing access, so you can wear it throughout your pregnancy and after giving birth. It's a size M, but it doesn't constrict the belly, so I could wear it until my due date. It shows some signs of wear, but it's still in good condition. I think it would be suitable for formal occasions like a baby's first visit to a shrine or a first meal ceremony. This is a used item, so please purchase only if you understand this.