Those stripes will only cause problems if you're photographing the baby from a LONG way away. Like, if the baby was being held in the arms of a person in a 30-person group photo.
Ah, the hair will be a problem for this one. You'll probably have to do it the hard way. https://www.damiensymonds.net/2015/04/the-handyman-method.html
The black background works in Yasmin's photos because of the backlight illuminating the hair. Yours doesn't have that.
I definitely wouldn't try changing the background completely. With the hair, it's just too difficult.
Do you mean the best way to send them?
Don't send them by email. Emails tend to shrink photos without your control.
The best way is to host them on a server somewhere and send the link to the client so they can download them.