Aww congrats sa baby mo! At 9 weeks, ang ultrasound mo ay mainly showing kung paano lumaki ang baby, dapat makikita mo yung gestational sac (parang little circle), then the yolk sac, and by 9 weeks usually may heartbeat na rin na makikita mo kasi super tiny pa pero may flutter, which is such a magical moment talaga! Ang measurements nila doon ay para ma-confirm ang due date mo, and they're also checking kung singleton or twins, and kung normal ang position ng baby sa uterus. Pero honestly, if something wasn't clear with your OB, don't hesitate mag-follow up or ask specifically which parts of the screen you want her to explain, a good doc will take the time, at kaya mo namang mag-request ng another explanation, kaya mo yan!