Quoting shes*almost*one!:" at my hospital. massachusetts general hospital. there is a huge midwifery service. they would much rather ... [snip!] ... cases. of course anyone could choose to be under the care of a doctor rather than a midwife though. is that how is is there?"
Our maternity care is usually only midwives. You can ask to be referred to a doctor instead, but they will only usually take over your care if you are deemed high risk or have other problems. Even then it will usually be the midwife and doctor working alongside each other to provide you with maternity care.
Our midwives study for years and shadow qualified midwives at university to get their degree and are trained to deal everything, including high risk cases and some midwives even specialize in high risk care. It's all free but if you want just a doctor for the sake of it then you have to go private, which means paying for it or getting insurance to pay for it.