Before I saw my OB for the first time, I was going by gestational age to calculate due date and how far along I was. At that point I was 7+3 weeks going by LMP. But when I went and got my first ultrasound the Dr. said fetal age is 5+6. Which means pregnancy would have started right as I was ovulating? I’m confused about what date you personally use. Wondering if maybe they do things differently in Germany vs the U.S.