<prompt> At what level of 0-HCG, normal pregnancy can be earliest detected by TVS Trans vaginal USG:500 IUml1000 lUmi1500 IUml2000 lUml  <response>: Ans-B 1000 IUml Gestational age and fetal structures identified by Transvaginal Sonography TVSMenstrual age weeksFetal structures4Choriodecidual thickness, chorionic sac.5Gestation sac,Yolk sac.6Fetal pole, cardiac activity7Lower limb buds, midgut herniation physiological8Upper limb buds, stomach9Spine, Choroid plexusFirst Trimester UGWParametersb-HC level maternal Gastational sac by TVS 1000-1200 mIUml Gastational sac by TAS 6000 mIUml Yolk sac 7000 mIUml Embryo 11,000 mIUml 