By Jacqueline Howard, CNN September 18, 2017 Watching the small needle pierce her 18-year-old daughter's navel was a striking moment for Dr. Cora Breuner. That afternoon in late spring, her daughter finally got the jeweled belly button ring she had been asking for, and Breuner got a reminder that her little girl was growing up. Breuner felt a swell of emotion, she said. "I did my usual Dr.…