B&W is probably a good choice. Babies and moms don't exactly have flattering skin tones in those first hours. These look excellent to me, but I am not a pro. You've done a good job balancing the various factors -- you probably do NOT want to be using strobes here, so you're dealing with available light and available backgrounds.
I would watch the contrast a bit, you're pushing it a fair bit which makes things dramatic, but loses some of the tender mood of these moments. The first one, in particular, has loads of deep dark blacks, lots of visual drama, when what we're looking at is a newborn.
Watch the backgrounds a little more. You're throwing them out of focus, but they're still there. The last one, in particular, has some mildly distracting material there. The middle two feel a little tightly framed to me. The third one, with mom kissing the wee one, it probably works. The second one could, to my eye, definitely use a little more room to breathe.
These are all fairly minor issues, I like the work, generally.