I am an MD/PhD student applying now for ob/gyn. I would check out Magee (Univ of Pitt), Northwestern, and Brown. They all have a lot of clinical and basic science research going on within the department. They also have great support staff dedicated to the department. I would also look at UNC and UAB (Univ of Alabama) - both are highly funded for research (UAB is currently the #2 NIH-funded ob/gyn department in the country).
Good luck. PM me if you have other questions.🙂