Once the blastocyst has implanted in the uterus it is called an embryo. After eight more weeks of development it is called a fetus.
When blastocyst attaches to the uterus it is called?
About 6 days after fertilization, the blastocyst attaches to the lining of the uterus, usually near the top. This process, called implantation, is completed by day 9 or 10.
Thus, embryo and fetus is correct.
To learn more about blastocyst click here:
https://brainly.com/question/3238975
