Found these in ~10 minutes of Googling:
http://■■■■■■■■■■■■■■■■■■■■■■■■/threads/nurse-midwife.267360/
http://■■■■■■■■■■■■■■■■■■■■■■■■/threads/what-do-we-think-of-cnms.389734/
http://■■■■■■■■■■■■■■■■■■■■■■■■/threads/midwife-or-doctor.475825/
http://www.gapmedics.com/blog/2014/01/13/midwife-versus-obstetrician-differences-and-similarities/
https://careervillage.org/questions/1795/difference-between-an-obstetrician-midwife-and-physician-assistant
http://everynurse.org/becoming-a-certified-nurse-midwife/
http://■■■■■■■■■■■■■■■■■■■■■■■■/threads/midwife-or-ob-gyn.1095670/
https://www.google.com/search?q=obgyn+hours
http://www.usnews.com/education/blogs/medical-school-admissions-doctor/2012/05/29/follow-a-day-in-the-life-of-an-ob-gyn
http://meded.ucsf.edu/ume/career-information-obstetrics-gynecology
http://www.obgyn.wisc.edu/residency/life-of-a-obgyn-resident.aspx
http://www.studentdoctor.net/2012/08/20-questions-angela-chien-obgyn/
https://www.google.com/search?q=cnm+midwife+hours
http://www.mothering.com/forum/16938-birth-professionals/1190348-schedule-work-hours-cnm.html
http://allnurses.com/certified-nurse-midwives/hours-cnm-work-502351.html?PageSpeed=noscript
http://www.rntobsn.org/careers/nurse-midwives/
http://allnurses.com/certified-nurse-midwives/life-of-a-150102.html?PageSpeed=noscript
http://allnurses.com/ob-gyn-nursing/midwives-schedule-125897.html?PageSpeed=noscript