About Transvaginal Ultrasound

Its possible po kaya na makita na si baby kahit wala pa po sya 1month sa tummy? Last mens ko po is last Dec. 5 to 10, all pt's i've test is all positive, and also tested the serum, thru blood and its also positive po. Hoping for your suggestion po, my ob said maybe I can try this week po. Anyone relate on my scenario po? Thank you.