I know many portrait & wedding photographers love to shoot wide open at f/1.2 & f/1.4. However, with newborn photography, many of the baby poses can have extreme angles and you often will have better luck with your depth of field and sharpness by shooting around f/2 & f/2.2. Remember, it will be rare that the baby’s eyes are on the same plane of focus all the time and by closing down my aperture a bit from wide open I get that little bit extra of depth of field that is often needed.
When styling a photo session, I like to start out with a basic color palette and go from there. It can help to have one “rock star” in the photos who carries a pattern in their outfit that the rest of the group’s clothing or accessories pulls from, while keeping everyone else’s outfits more simple. You can do this with a neutral and a few colorful brights, or try a softer palette that has different tonal ranges of the same shades.