Ay, totoo yan, pelvic ultrasound ay hindi 100% accurate lagi, especially kung depende sa skill ng technician or kung malinaw ang view, kaya maraming doctors ang nag-oorder ng follow-up ultrasound or other tests para ma-confirm talaga. A few of us moms had situations where first ultrasound missed something or showed unclear results, so the OB had to repeat or mag-refer for second opinion, it's actually normal practice. If may specific concern ka about your ultrasound results, best talaga to ask your doctor directly kung may dapat i-follow up or kung kailangan ng ibang imaging para ma-confirm, since sila ang makakasagot ng tama based sa what they actually saw sa scan mo.