Can you give me some ideas of fertility myths in mythology?

Question

I am not asking about how to become pregnant. I am looking for mythological stories of fertility with mythological Gods and stuff like that.

Answer 1

Well, there's the one about Ouranos (Uranus, Heaven) and Ge (Gaia, Earth).  

These two gods are the grandparents of Zeus and the Greek Pantheon.

Supposedly Ouranos was engaged in perpetual conjugation (intercourse) with Ge, and she kept conceiving children. But the children were hidden away in caverns underground (in her womb), and could not be born until Ouranous disengaged himself. So Ge fashioned a sickle for Kronos, who cut off his fathers genitals and threw them into the ocean, thus forever separating Heaven and Earth so that life could come forth. After while all his siblings emerged. These were the Titans who ruled before Zeus.

Incidentally, Ouranous severed genitals floated in the ocean for several days, during which time a foam formed around them, out of which Aphrodite (Venus) emerged, settling ashore in Cyprus. (As depicted by Boticelli in his famous Birth of Venus painting).