Exam 20: Pregnancy: Development From Conception to Newborn

The change in sperm that prepares them to fertilize an egg is known as _____________.

An ovum is viable for up to _____ hours after ovulation.

The amnion provides a diffusion area for the amniotic fluid.

Identical, or _______________ twins arise when one zygote splits into two separate balls of cells.

How many days old is this embryo?

The effect of oxytocin on the uterus is a rare example of _________ _________, which means more oxytocin produces stronger contractions and stimulates the production of yet more oxytocin.

In this diagram, what is labeled B?

Identify the region indicated by the arrow.

Approximately how many days old is this group of cells?

A sperm fuses with the oocyte membrane in a process called:

The sucking response (sucking fingers and thumbs) is usually seen in the:

When a sperm fertilizes an egg the resulting cell is called:

The procedure for collecting amniotic fluid for analysis is called _______________.

The innermost layer of the developing embryo is called the ___________.

In this diagram, what is labeled A?

Which statement is true regarding the yolk sac?

What is the embryo also called at this point of development?

Which stage of labor is depicted here?

The fetal stage refers to the period immediately following birth.

In the developing embryo and fetus, waste removal and nutrient circulation are accomplished by simple diffusion.