One aspect of the Amazonian warrior woman that is never considered by its SF/F proponents is the female ability to override any combat assignment at will:
Nearly 100 female British soldiers have been sent home from Afghanistan after finding out they were pregnant. Between January 2006 and December last year, 99 servicewomen on operations have been flown back to the UK under strict military rules that ban mothers-to-be from serving in a war zone.The women were flown back on flights usually reserved for injured troops, meaning the true figure could be higher if other female soldiers came home via routine flights.
That is 1.2 percent of all the women serving in the British Army. The percentage of women serving in Afghanistan is even higher, though unknown. And keep in mind that only three women have been killed in Afghanistan. This should suffice to demonstrate the complete absurdity of women in combat. Even if one assumes a 10:1 kill ratio in Afghanistan, it means an Amazonian warrior woman is more than three times likely to get pregnant than to kill a single enemy troop.
In battles between reasonably equivalent forces, such as the Eastern Front in WWII, the kill ratio is 2:1. So, for every enemy soldier killed by a female soldier, the superior army can assume that it will lose 16.5 of its troops to pregnancy.