There are good reasons why woman use yoga breathing for pregnancy, and any woman who is pregnant for the first time should learn how to do this. She will want to breathe better, so that she can feel better. She will want to keep taking in breath after breath like they do in yoga, so that she can feel calm and pain free. And, she can learn how to do all of this by looking online. There are tutorials for yoga breathing, and she will feel better when she watches one and learns how to do this.
Yoga breathing for pregnancy is a good thing, and every woman who is pregnant, or who believes that she will be pregnant soon, should learn how to do this. She will feel better through her pregnancy when she knows how to do the right breathing, and she will be glad when she learns this as early as possible.