It's due to experience level and the fear of overdoing the anesthesia or the stress of such a lengthy operation that they may not be used to, or it may be because they want to schedule multiple surgeries in one day, rather than just 1 (makes them more $). The fear of malpractice can also make them feel more cautious, or also the risk of infection, so some doctors may want to split it in parts. Also, they may think the pain may be unbearable for you and splitting it may make it less traumatic. Research board certifications as well as pending lawsuits or past lawsuits against the surgeons you have consulted. Make sure they're not just certified by the AMA or Board Certified in surgery but that they are certified in PLASTIC or RECONSTRUCTIVE surgery, which is much different than other types of surgery. Of course it helps if a friend used them in the past with success and recommends the doctor to you. Some people also review the doctors online so search for that as well, or search by the clinic's name. I'd want to get it all done in one shot, rather than having to face a dual recovery and being out of commission for so long, especially if you're a working mom; companies frown upon too much vacation time, especially for something like cosmetic surgery which is not medically necessary. Better to suffer once than twice, I'd say, but it's a personal choice. Maybe you'd feel more comfortable with doing a single operation. Research online too. There are plenty of tummy tuck support sites, such as tuckthattummy.com or makemeheal.com, for general cosmetic surgery. You can read the blogs, see before and after pictures, and meet people who have gone through what you plan to go through, even find local doctors. I researched the actual procedure on google (googled tummy tuck before and after) and found women who had gone through it, blogged about their entire experience and I befriended them, exchanged emails, and got plenty of tips on what to do to make recovery easier and how to prepare for the surgery, so you can try that as well. I have not gone through it yet though so I can't give better advice but if you had a c-section, the pain from a tummy tuck is on that level, I have been told. Good luck with whomever you decide to ultimately go with, you deserve to look great!