I was losing my hair a lot around my edges. I used rosemary oil (Camille rose has a serum) and curl smith density elixir. I used one very morning and the other every night and my edges came back! Hope this helps!
Baby blues postpartum hair vitamins have been lifesavers for mine, my prenatal wasn't really moving the needle.
Unfortunately, there's not much. It's because of the post-partum hormone swing. Taking a prenatal vitamin can help, but there's nothing to do but wait it out, unfortunately.