Id like to work shop some backstories for female space marine unit.
Gunna take the basic space marine body and purchase these heads.
http://www.statuesqueminiatures.co.uk/p/9147497/sma302-heroic-scale-female-heads-2.html
From the planet Thamiscyra
A feral death world with a extra ordinarily high 3 to 1 female bias birth rate. The planets harsh environment creates a high potential for soldiers.
Fluff suggests that its not impossible for a female to become a space marine just 1 in a trillion compared to the 1 in a billion for men.
As you can probably tell I am going for a amazon theme so a close proximity to Olympia and Ultramar, the planet of Thamiscyra and our commander is Penthesilea.
Right now for justification my current ideas are that some mutation from there planet has made them compatible for space marine gene seeding or perhaps a tampered gene seed by some rogue adeptus mechanicus from the sect organicists cult.
I also could just simply choose to ignore the fluff about female space marines like some of the games do, cause frankly its outdated and really just limits variety.
Is there any lore or fluff I am missing and can fall back on?