Thoughts on announcing pregnancy to siblings who can’t have kids

I figured I’d post here bc I’m sure some would be triggered by my asking. I’m pregnant with my 4th kid, totally not planned lol anyway, two of my sisters cannot have children. One has pcos and can’t have children. the other has endometriosis and was told her chances are very slim. Meanwhile I’m over here getting pregnant while on birth control and I can’t help but feel like no matter how I tell them I’ll look like an ass. When I was pregnant with my last one and told the sister with pcos- she cried. So I guess I’m looking for advice? Or if I’m overthinking it and should just tell them proudly