There has been a lot of recent discussion of how many cesareans a woman should have. The National Institutes of Health recommended that women who were having cesarean birth limit their family size to one or two children. Babies tend to be at an increased risk for breathing difficulties than their vaginally born counterparts as well as other potential complications.
Maternal risks can also be increased with additional surgeries, including adhesions.
Source:
NIH State-of-the-Science Conference Statement on cesarean delivery on maternal request. NIH Consens State Sci Statements. 2006 Mar 27-29;23(1):1-29.
Timing of elective repeat cesarean delivery at term and neonatal outcomes. N Engl J Med. 2009 Jan 8;360(2):183-4.

