A Marvel comic created by two women in 1980? Such was not virtually unheard of, it was actually unheard of. Unprecedented, in fact.
Louise Simonson had been an editor at Marvel for years (her husband, Walt, is a legend in the business), but was encouraged by Jim Shooter to try her hand as an author. Power Pack was an incredibly ambitious first book. It was about all-new characters. They were children. The first issue was double-sized.
And it was a hit.
It won an Eagle Award and went on for over 60 issues. The team has been revived again and again, always to positive fan reaction.
The book did so well, she was later offered the opportunity to create X-Factor and a bunch of other popular titles.
It debuted on May 1, 1984.