Long ago all men from planet Eros were lost during a war.
Fortunately they left behind a large supply of sperm and life on their planet evolved in a female only civilisation.
But now, the stock of sperm is running out.
So Astra, the heir princess of Eros is sent into space to seek the precious fluid.
Astra is a creation of Jerry Robinson but they are no other credits in the book so writers and artists are unknown apart from the variant cover penciller.