There is a definite distinction between natural and non-natural shows. Natural shows are advertised as such and drug tested (polygraph and urinalysis).
That said, I would imagine steroid use is much more common among male bodybuilders vs female even at a non-natural show. Steroid use by woman eventually results in a grotesque physique and facial features.
Females and males alike can achieve very respectful and aesthetic physiques without using.
James 1:16-17 ESV
Do not be deceived, my beloved brothers. Every good gift and every perfect gift is from above, coming down from the Father of lights
With God's help...Mens sana in corpore sano