Sonogram Terminology Associated With Pregnancy

Dark area: an anechoic area with a range of more than 1 cm. Increase the sensitivity, still no echo, called the echo-free dark area, for a uniform liquid, such as follicular fluid, cyst fluid, fetal water, urine, etc. Dark spots below 1 cm.
Veterinary B ultrasound  Scanner

Spot: A bright area with a range of less than 1 cm. Less than 0.5 cm is called a small spot, more than 1 cm is called a light group. The light spots or light clusters that appear in the dark areas of the uterus at the beginning of pregnancy are early embryo body reflections, called embryo spot. A spot or cluster of light that protrudes from the wall of the uterus of the pregnancy, which is an early placenta or placenta, which are weak echoes. An echo of a strong spot or cluster of light that is the echo of the fetal bone section.