yung transvaginal ultrasound or transV po ipinapasok sa V yung pang ultrasound. usually during 1st trimester kasi maliit pa si baby and mahirap pa makita thru pelvic ultrasound. yung biophysical scoring or BPS is sa may pelvic area lang or sa puson to measure development ni baby pag malapit na manganak so 3rd trimester to ginagawa.