[pbhjpbhj]

>I'm curious how an interviewer would even know if the woman has kids.

Perhaps they actually read their CV? There would be some guesswork involved, for sure, but I think that an experienced recruiter could probably spot the signs at interview.

A few things of the top off my head that would help: Most people list marital status on a CV. Hobbies? If they have lots of them then they're not likely looking after kids. Do they travel a lot. Are they the right age? Does their appearance suggest they spend lots on themselves compared to their income? Is their phone smashed up. Are they up on current affairs? Is their any hesitation when you ask if they'll be able to do late shifts or stay late or travel on short notice ... etc., etc..