Your Options Medical offers a host of services including pregnancy testing, ultrasound, and options counseling. When serving patients, some women want to know details about early fetal development. We receive a lot of questions, but here are a few answers to the most common fetal development questions that come our way. “What is the difference between an embryo and a fetus?” The terms embryo and fetus signify the unborn baby’s level of development . Similar to using the