Question

prenatal care and development
the very beginning

• human body begins as one microscopic cell formed through — union of a male

sperm cell and a female egg cell (also known as conception)

• cell that results is called a zygote
• zygote divides many times as it travels through the fallopian tube forming a cluster of cells by the

time it reaches the uterus

• — process by which the zygote attaches to the uterine wall
• after about two weeks, zygote becomes an — cluster of cells that develops between

the third and eighth week of pregnancy

• referred to as a after about eight weeks

Explanation:

The first blank is about the process of sperm and egg union, which is fertilization. The second blank is the process of the zygote attaching to the uterine wall, which is implantation. The third blank is the stage between the third and eighth week of pregnancy, which is an embryo. The fourth blank is the stage after about eight weeks, which is a fetus.

Answer:

fertilization, implantation, embryo, fetus