Ay, hindi every checkup ang ultrasound, usually lang around 12 weeks para sa dating, then 20 weeks para sa anatomy scan, tapos 28-30 weeks kung may concerns ang doctor mo. Ligtas naman siya, walang radiation like X-ray, pero sobrang dami nang ultrasound without medical reason ay hindi talaga kailangan, kaya importante mag-discuss with your OB kung bakit exactly ginagawa niya. A few of us moms actually asked our doctors kung talagang necessary, at nag-explain naman sila ng reason, mas peace of mind lang talaga para sa iba, but if walang specific concern, the routine ones ay enough na talaga!