Meredith: (opening voiceover) Here's what I learn my first day at medical school... think long and hard before choosing to become a surgeon. It takes 100% commitment. You have to be on your A game every single time you walk into that O.R. When patients are lying on your table completely at your mercy, they need to know that when you make that first cut... you know what you're doing. No other specialty requires the time, the focus, the complete dedication... except maybe being a mom.