That's funny Jayce. My sister was a team truck driver and now drives a school bus. My friend (a woman) works for the phone company and is doing pole climbing training next week so I helped her pick out steel toed boots last night.
There are exceptions to every rule but come on, honestly what's the percentage? It's very low. My brother just started working for edison, yes there's a few women but uh not a large number % wise at all.
From my experience, I have had many many employees over the years. I have had good and bad from both sexes. I have also realized that pregnancy leave is no big deal in the long run.
It is a big deal because in the mindset of a business owner who would you employ and pay more? A single guy that will stay late, work weekends, smooze clients? Or someone that is married, has kids and is always taking time off when they get sick. Late to work frequently for child care/sick issues (happens here all the time with multiple people in my dept btw and company wide it's much larger) not willing to stay late (have to pick up kid(s) from school/daycare), not willing to come in on weekends as much etc (wow that's a run on sentence).
You see my point though, yes there are exceptions to EVERY rule and everybody's personal experience is different but by and large that's why salary differences exist. In a company like the one where I work pay is equal.
Depending on your position and what you do.