Anatomy Ultrasound

Danielle • Dated my husband since December 2006 and we were married May 2016. Baby boy Henry born June 2nd 2017 👶🏼💙
My doctor scheduled my anatomy ultrasound for tomorrow. I will be 18 weeks and 6 days fetal age but they say I am 19 weeks gestational age. Anyways, my question is, can they usually tell the gender at that amount of weeks and see the brain and heart well? What was your experience?