Usual lab tests for 3rd trimester

Hello! Meron po ba ditong hindi nirequire ng OB for other lab tests except sa ultrasound? May nababasa kasi akong posts from other mommy groups na nirequire silang magpacheck ng blood sugar, CAS, 3D, 4D ultrasound and the likes. I'm currenty on my 29th wk and aside sa checkup with ultrasound every 3wks (not the kind na may written report na binibigay after checkup kundi screenshot lang ng utz image ni baby), wala pa kong ibang lab tests na naundergo. Is this normal or should I consider having another OB?