First Person Singular: Preston Sacks, 51, Bethesda, reproductive endocrinologist

By training, I’m an obstetrician/gynecologist. But in residency, I really took a liking to the infertility aspect of it. Infertility work, number one, is intellectually challenging. It’s a field which is constantly evolving with new technology. And there’s just something special about being able to help someone through a difficult time and, hopefully, allow them to have a family. When you think about it, when you depart the earth, you don’t leave behind a whole lot, but you do leave behind, hopefully, a family and a legacy. A week doesn’t go by that I’m not out on the street and see a former patient who comes up and says hi, or they’ll tell me about their kids and show me pictures. It’s very rewarding. I get a nice window into people’s lives, and I get to become a part of their lives.

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