Having a baby is a woman's lifelong wish, and being a mother is also the happiest moment for a woman. Although this moment will be accompanied by great pain, the greater the pain, the stronger the sense of happiness will be. However, as a family member, you should also take good care of your sister's health while being happy for her. Bringing a gift when visiting her will also make her feel good. As for the gift, I can give you some suggestions:
1. Visiting your sister is actually a kind of care. You can bring some supplements, which are also good for your sister's health. You can also bring some snacks that your sister likes to eat.
2. Of course, since you have a little niece, you can also bring a meeting gift. A set of baby jewelry is very good. I believe your sister will like such a gift very much.
3. You can also make a real doll for your sister. Of course, you have to make it look like a baby, which is realistic and cute. It can also be used as a souvenir to commemorate the baby's birthday.