Francesca shot a few XXX movies in her native France, but she is probably best-known for her appearances in a string of Channel 69's Body Builders In Heat and Big Clits Big Lips series videos, together with her numerous appearances in videos made by Dolly Buster's German company DBM Videovertrieb.
She mainly adopted the psuedonym Mara Moresco for the latter, which included some of her most daring performances, often including anal and sometimes fisting scenes. She also used a variety of other aliases. They include the likes of Francesca Rosa, Francheska Rosa, Francesca, Franchesca and Sally Body.
The fact she had been a successful pro bodybuilder proved a great marketing tool for the adult companies Francesca worked with. The peak of her competitive career was taking first place in the WABBA World Championships in 1989, 1992 and 1993. She won places in a string of other top bodybuilder contests across Europe and Canada.
Being a bodybuilder in the porn industry made Francesca Petitjean quite the rarity and earned her some cross-over into somewhat more mainstream recognition. She was featured alongside the likes of other 'cross-over' adult stars like Lolo Ferrari on the UK-produced mainstream television magazine show Eurotrash, for example, which aired on Britain's terrestrial Channel Four station.