Sorry but it's really laughable when people say that those girls are "natural". The amount of testosterone required to build and support those muscles, recovery and leanness WOULD have turned their faces hella manly long time ago. The only way those muscles would have been "natural" if they were on naturally very high-testosterone (over biologically normal numbers) females. They'd have to be female with medical abnormality, like intersex condition (most likely) or other hyperandrogenic state. It would show on the face. Testosterone affects facial appearance very much. The only way those girls have that muscle mass and keep pretty fem faces and figure is through the use of low-androgenic anabolic steroids. Sorry, there're no natural girls in those pics with big a** muscles. They're as natural as any Soviet athlete from the 80s
Also, breast implants aren't natural and the roids to build those muscle would have shrunken natural chest long time ago. If you want to believe they're "natural"... yeah there're also fairies and gnomes. I guess some people are all-natural for a few months off cycle...