Got some news for ya. California (surprise) is being challenged by actual women who don't want men pretending to be women in their prison, like California wants.
https://www.sacbee.com/news/politics-government/the-state-worker/article256071452.html
Some do maintain a small military, Texas State Guard, though I'm not sure of other states.
A lot of single motherhood in the US is caused by the way we do welfare. If we didn't punish them for having a father living with them and contributing then we wouldn't be where we are with it. It was designed that way to keep people on the doll, or seems to be from the results of it. If you wanted to reduce it, cut out benefits on a 2 for 1 scheme. For every 2 dollars you earn, you lose 1 dollar in benefits, so instead of discouraging work with it, you encourage working.
That operated for decades without any issues, while the police knew about it.