Baby weight at 30 weeks?

Mikayla • I'm 23, married for 4 years, we have a beautiful 2year old little girl! she is our universe!!!! I'm a cancer in a home with two Capricorns!!!! Baby #2 due may 2019!

So I keep seeing people post how much their baby weighs around now and I keep asking my ob and get no answer. Haven't had an ultrasound since 20 weeks. So I'm wondering.

How much did your baby weigh?

How can they tell without ultrasound??