One of the things you do when disaster strikes is dash for the ladies, because you know you're safer there. I made s bolt for the loo for privacy and to empty the full bladder you have to have for an early scan. Next thing, a midwife is banging on the door, "Are you alright?!" No, they just told me my baby's heartbeat is gone; of course I'm not alright! Stupid question.
Likewise, part of IVF back in the day was collecting every drop of urine you passed across 24 hours. They gave you a big plastic tank (!) I took it to work and hid it under the coats in the corner of the ladies off the staffroom.
Imagine having to cope in those private spaces with men wandering in and out at will...