I'm the proud Mom of a recent medical school graduate (5/2018); 1st year Resident Pediatrician.
I researched medical schools in Texas. One of the Best Grad Schools that came up is: University of Texas Southwestern Medical Center. https://www.usnews.com/best-graduate-schools/top-medical-schools/university-of-texas-southwestern-medical-center-at-dallas-04116
In case you don't want to limit yourself to Texas, here's a link to other schools: https://www.usnews.com/best-graduate-schools/top-medical-schools/obgyn-rankings. . . . Make sure you scroll down to the bottom.
FYI, my son is a resident at one of these schools on this list.
Good Luck to You!