During an ultrasound, a doctor is able to view all the major organs and body parts of a developing fetus during which trimester?

a. 1sttrimester

b. 2ndtrimester

c. 3rdtrimester

d. 4thtrimester

A) 1st Trimester

During this stage, all of your baby’s major organs and body parts begin to develop. The cells of the embryo (called embryonic stem cells) multiply and change into the hundreds of different types of cells needed to make a whole human body.