Ay, mama, honestly na-worry din ako dyan last time kasi nakita namin sa ultrasound ng anak ko, pero importante talaga na i-discuss mo yan directly sa OB mo kasi siya ang makaka-interpret ng ultrasound mo based sa gestational age at other factors, hindi lang yung measurement mismo! One of my mum friends had something similar and ang OB niya explained na maraming reasons kung bakit may slight thickening, kaya hindi automatic na may problema, pero kailangan talaga ng professional na makita ang buong picture. I-ask mo din kung kailangan pa ng follow-up ultrasound, okay lang yan to ask! Hugs, hoping it's nothing but you deserve peace of mind from your doctor mismo.