Can you see a penis???

Michelle • After lots of prayer we are expecting our rainbow baby 11/04/2016 😍👶🏻🌈
Ok I thought that on an early ultrasound (this was 13 weeks) that there was NO WAY to see gender. I am really aggravated by three people in my life who are total know it alls pointing to my babies leg and saying there's the penis..... Someone please tell me if they see a penis or if it's even possible to tell this early.