17 years ago my (x)h and I were in the same field and earning approx the same amount (I earned v slightly more). I was pregnant (early 30s). I had a good employer (small company) who recognised my worth and wanted to keep me. xh had a large company employer.
We (both of us) decided that 3 day childcare, 4 day parentcare would be a good compromise to meet child's needs and ours. I suggested 4 days per week each - this (apparently) would make his career progression none existent.
I went to 3 days per week. Worked this way for 10 years. My career stalled as I had to ensure childcare, drop offs, pick ups etc. Xh was very hands on but also worked away a lot (not an option for me unless I checked first and the stress involved in the arrangements wasnt worth it)
The company I worked for went into liquidation. I had to find another job, currently working 3 days per week. I looked for 8 months for a part time job on a field which accepts flexible working and which I had nearly 20 years experience. Nothing. In the end I took a full time job, but xh still worked away part of the week, the jobs were in city centre and childcare only available until 545. This meant that 2 nights a week I had to leave at 430. I could work until 7 the other nights, I could start before 8 3 days per week, but 2 days I had to leave at 430. I had to accept a 25% reduction in salary to get a job in my field where I could leave at 430 2 nights a week. Thats the reality of flexible working when you're looking for a job rather than working for an existing employer.
A few years of full time work later, marriage fell apart (hmmmm, no family support, expected to work silly hours, huge childcare costs, high stress levels) xh divorced me for unreasonable behaviour on the grounds that 'during easter holidays Hiding worked all holiday and left xh to make childcare arrangements'. I had made all childcare arrangements for ELEVEN YEARS, but solicitor thought it was valid grounds for divorce (obv divorce was due to far more than this, but solicitor decided, and judges agreed, that this was unreasonable behaviour)
So, thirty years after meeting dh, thirty years in the same industry, ten years I worked 3 days per week, both equally capable (and I'm probably more career focussed), he earns 30% more than I do, he has company pension, I can't afford to retire as we paid any extras into his pension and judges are not keen to award this to spouses, I'm stuck at a level I can't progress from because most people make the 'jump' at late 30s. Because I spent 10 years focussing on family (and did work 3 days a week during that time), I'm trying to make the 'jump' late 40s, but that's not acceptable because if you were capable you'd have been promoted to that level ten years earlier. That's where the glass ceiling is, it's a combination of sexism and agism which says if you are any good you read 'x' level by 'y' age but doesn't take into account that it may be 'y+5' or 'y+10' if you were the primary carer
Phew - rant over. The really sad thing is that i wouldn't have given up my time with my children. I look at them and know I have contributed something valuable to society. But, if you want to look at it financially, it has cost me over 250k (gross) in lost earnings compared to my male partner in the same position, and can't even begin to consider pension funding.
I have accepted that if I want to retire, I sell everything, realise my assets and then accept it's time to go when I can no longer afford to live.....