It seems to be all speculation as to WHY and this is one I had not heard of from the womb viewpoint. Yes, on the Vit D in general on deficiency. As a matter of fact my sister told me about the D deficiency back in 2006 and I was very deficient and live in So. Calif where the sun always shines but I'm not sitting or laying in it. So I supplement.

She was making sure her daughter was getting enough D as the mother/daughter connection and MS.

No one knows WHY on anything we end up with, I deal with a body of arthritis and I can come up with probably 5 reasons why I believe I live with it.