I took this little 1-page RPG called Pocket Delver and tried giving it a pregnancy spin. Instead of having plot points like normal, have 6 stages of pregnancy: Fertile, Knocked Up, Showing, Ready to Pop, Water Break, and Birth. Set the plot point die to a 6 or 7 and instead of finishing a plot point, add progression with every birth. Roll a d6 for the number of babies. (1-3 one, 4-5 twins, 6 triplets.)
My heroine of choice ended up getting raped left and right and gave birth 3 times to 7 babies throughout her little trek.