Uy mama, that's something importante talaga na kailangan i-follow up with your OB personally, don't rely on online answers para dito, promise! At 16 weeks pa lang kayo, maraming beses pa ang ultrasound ninyo, kaya important na marinig directly from your doctor kung ano ang plan. A few of us moms have had similar findings mid-pregnancy, at usually it changes pa by the time we're further along, so please don't worry too much yet, pero do ask your OB exactly what it means for your situation and kung ano ang next steps. They'll explain everything clearly, swear. Keep that ultrasound results safe at dalhin sa next visit ninyo, ha!