So, since Chichi, Bulma, and Videl, (and spoiler alert, Launch) have all birthed Saiyan offspring, I think it'd be cool if some of the...Saiyan DNA inside of them that would/could permanently alter their body somehow made them stronger. Not enough to take their husbands in a fight 1-on-1 (though that wouldn't stop them from trying), but they're a smidge stronger than they were prior to carrying a Saiyan child in the womb. Goku swore he saw Chichi levitating while she was nagging him about the household chores one day. Bulma slapped Vegeta on the shoulder hard enough to make him wince once, and sparring against Videl hurts more than it did before Pan was born.