Off the top of my head (and likely the stats are somewhat out of date, but not irrelevant):
1. Married men going to college tend to move to whatever college best serves their career goals. Married women pursuing an education tend to take classes at whatever local college best fits their schedule and budget and let's them put family first.
2. Men starting businesses are much more likely to "go big or go home" -- get loans or VC money, for example -- and women are much more likely to bootstrap it and only grow the business on a pay as you go basis. Women's businesses are much more likely than men's to be characterized as lifestyle businesses where they are fitting their work around some other priority.
3. Men tend to move someplace new to take a promotion. Women tend to move someplace new to follow their husband's career and this typically involves a career setback for them.
4. Even in two career couples, the woman still tends to do the lion's share of the women's work.
Over the years, I gathered a lot of such factoids and they boil down to "Women generally put their husband's career ahead of their own." Unsurprisingly, men generally outperform women career-wise.
I think there are broadly two reasons for this.
1. Outside forces, such as social expectations, pressure from other people, the weight of history, gendered "habit" and assumptions that people may not question until it's too late.
2. The reality that women are the ones who get pregnant, so no matter how much you may WANT a career, I think women tend to hedge their bets and support his career just in case she unexpectedly gets pregnant or a planned pregnancy results in a special needs child or harms her health or similar outcomes where simply being a sexually active woman may derail your career in ways that make it wise to want to give him reason to stick around and support you.