Fertilization and Pregnancy Crossword

This printable crossword puzzle on the topic of Human Body Systems has 12 clues. Answers range from 3 to 18 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

The levels of this hormone must remain high in order to maintain the corpus luteum
A fluid-filled embryonic membrane
Once fertilized, the egg is called a __________.
Is this site for the exchange of nutrients and wastes between mother and fetus.
An early stage of embryonic development.
The structure that the sperm cells travel through first in order to reach the uterus.
The attachment of the embryo to the endometrium.
Connects the fetus to the placenta.
Is a placental hormone that maintains the corpus luteum.
Is the outer membrane of a developing embryo.
During this stage, the heart is formed.
The germ layer that is responsible for the development of the hair.