I have come up with a game in my tired state. It may seem stupid but right about now it seems like a great study tool. The game requires you yourself be female or you have a significant other that is a female because this game focuses on sex hormones and the ever important menstrual cycle. 

First memorize the cycle in the simple phases:

1-~10 days is the Proliferative phase. This is where the endometrium is built up to eventually support implantation and fetal development.

~10-~23 days is the Secretory phase. this is where the uterine gland is formed in the endometrium and implantation may occur.

~23-28 days is the Menstrual phase. this is where the endometrium is sloughed off due to no implantation and prepares to try again next month.

Now the game is played like so: ask your female friend previously selected what day of her cycle she is on. now you get to explain what is happening inside her right at that moment. 

Twists: to take it to the next level you can associate and talk about the rise and fall of hormones (estrogen and progesterone) occurring as well. If you are going to take this step be sure and explain fully where estrogen and progesterone are secreted from (most of the time the corpus luteum). Also get her involved and have her ask you questions about what is going on in her body. If she can catch you off guard it will be better for your learning.

WARNING: This may cause unhappy emotions in some people and is meant for fun, learning, and my amusement.