This first website I found has all stages of pregnancy dressing, including post baby.
http://walkingwithdancers.blogspot.ca/2012/03/looking-good-while-pregnant.html?showComment=1351445862566&m=1
A book I found called "Hot in a minivan" has 10 Mom wardrobe essentials. I'll list them here.
1. Dark denim, 2% Lycra/stretch
2. Tunic top. If tummy is issue, look for empire style. To camouflage legs or bum, look for one that hits just above the knee.
3. Classic cardigan. Long enough to wear over leggings, but not oversized
4. Everyday dress
5. Black leggings--these may be more forgiving than first non-maternity jeans post baby. Just remember something long enough over it.
6. Boyfriend jacket--fits in the shoulder but slightly roomy in the middle
7. Simple shirt dress
8. Casual striped tee
9. Fitted pencil skirt
10. A wow-worthy red dress. Either tailored or wrap-style
Also says 5 ways to look thinner:
1. Slim with one color(head to toe)
2. Busy patterns--to hide or distract from problem areas. No more than 1 piece of clothing with pattern at once
3. Statement jewelry--big earrings or chunky necklace to draw attention elsewhere
4. Long scarf- provides belly bulge or chest camouflage
5. Add a wide belt to create a waist
Also: how to hide your jiggle in a jiff
1. Don't try to squeeze into too small clothes. Fit is more important than size
2. No clingy tshirts/tops. Look for gathering at bust and looser at the bottom.
Another website, which in my opinion has a few ideas for nursing.
http://gab.giggle.com/2011/12/parent-talk/what-to-wear-postpartum-edition/