From the "No Duh" Department

"Fatigue, Headaches Common at 11 Weeks After Childbirth; Research on moms finds support, less job stress associated with better postpartum health"

If you actually need to see that this is research, check the URL:
http://www.annfammed.org/cgi/content/full/5/6/519

I know you will find it hard to believe, but their results in the abstract are:

At 11 weeks postpartum, 661 participants (81% of enrollees) completed a
full interview, and 50% of participants had returned to work. On average, women
reported 4.1 (SD 3.2) childbirth-related symptoms, most frequently fatigue
(43%). Factors significantly associated with better health outcomes included
better preconception health, the absence of prenatal mood problems, more control
over work and home activities, more social support at work and home, and less
job stress.