Originally Posted by
atomic sagebrush
It's not that it doesn't show anything, it's that it is too early and all babies look somewhat girlish at this point. All babies start off with things that look like clitoris and vagina and it's only once the Y chromosome wakes up and starts making testosterone that the penis and testicles develop. At 12 weeks straight up this process is somewhat underway but is not reliable to spot it on ultrasounds. There are a FEW babies, a minority, where you can see a ding-a-ling at 12 weeks. Most are not visible till the end of the 12th, even into the 13th week. I have seen some boys who I would have sworn were girls even at the end of the 13th week. So I don't like guessing too early because I don't like giving people false hope or causing them false despair with wrong guesses. Wrong guesses are worse than no guess at all and I just cannot tell from these.