Congrats on 16 weeks, mama! Most doctors can tell the gender around 18-20 weeks sa detailed ultrasound, so malapit ka na, a few of us nag-try mag-peek earlier pero ang tech ay hindi confident pa kaya nag-wait lang kami ng couple more weeks para sure na. Try mo i-ask ang OB mo sa next visit if visible na, but usually mas clear talaga kapag 18-20 weeks na, especially kung babae, ang boys sometimes mas mabilis makita pero hindi guaranteed pa rin.