What are "setback" risks of returning to work early? as in early i'd say three weeks after giving birth.

No setbacks: If a woman desires to go back to work 3 weeks after delivery and feels comfortable to do so, there are no setbacks. The transition to the non-pregnant state takes about 6 weeks, and most women enjoy being able to spend this time with their newborn baby. Bonding between mom and her baby cannot be overestimated, and the more time she has to spend with the baby, the better for both of them.