What "Lives" in the Fallopian Tube for a Brief Period

Question

What "lives" in the fallopian tube for a brief period of time?
A) An embryo
B) A fetus
C) A blastocyst
D) A zygote

Accepted Answer

After fertilization, the sperm and egg combine to form a zygote which travels through the fallopian tube towards the uterus. The zygote typically implants in the uterine lining several days later, which is where it develops into a blastocyst, and eventually an embryo and fetus. However, for a brief period of time (usually around 3-4 days), the zygote is the only thing present in the fallopian tube before it reaches the uterus.