If the question is about how much labor and delivery costs, the answer is, a lot. My first birth was billed (at insured rates) at about $12,000. That's the low end of the spectrum - unmedicated birth using a midwifery practice. The bills for my second birth are still coming in, but they will be closer to $30,000. Same midwifes, but I got an epidural this time, and my son was early and had a 4 day stay in the special care nursery. Throw in a C-section, it would have been well over $50,000.
And keep in mind that, whatever your intentions and risk profile, you really can't plan on the best case scenario. My first birth went exactly as planned. Second time around, I went into labor a month early. No risk factors, no reason to believe it would happen. We have a $2,000 per person OOP maximum, and we will definitely hit it.