Idea

(Name here) is your everyday, below-average college student who has trouble finding a purpose in life. Right when he hits a new low, he gets a call from his world-famous scientist uncle, offering him to be a test person for their experimental cryostasis machine. Finding nothing else to loose he decides to take the offer and is set to sleep for a hundred years.
When he wakes up he finds the lab in ruins, and only one singular note left on the table. During his sleep science found a way to impregnate eggs with only the DNA of other women. With this newfound way to reproduce women activists got a huge boost in power. Soon, every girl was thinking the same way: if we don't need men to reproduce, what are they good for? Soon a world war was waged, and now the male gender is extinct, except for him!
His cryostasis was delayed for him to wake up in the new world of woman. Now, he finds himself with the most important mission of all mankind: get a woman pregnant with a man before the y-chromosone is gone forever!