Let's try this on for size: Can ANYONE of ANY GENDER with a highly demanding, high-responsibility professional career take on a second, nearly full-time job with highly variable hours, and expect to successfully maintain his/her career that way or at least 18 years? Oh, hell no!
Why does anyone think this is viable? Why would any employer in any such field say "Sure, feel free to make that second commitment, and take off all the time you want, whenever you need, to make it work?" If it sounds ridiculous, it should - women (or men) who choose the mommy or daddy track have to face that reality. But what passes for feminism these days supports the delusional idea that somehow it should be possible to make exactly this choice without consequence to profession or sanity.
Having kids is a choice, and it has consequences. Want a high-stakes career where you get to do cool stuff that's highly time sensitive and requires REAL dedication to get the job done, not just a paycheck-to-paycheck low-ambition life? Don't have kids. Or at least understand that you'd better find a partner who can and will dedicate most or all their time to that second job. Or, make enough money and be willing to pay someone else to do the job of raising the kids.
OF COURSE women (or men) can't "have it all." It's a stupid lie told by people in denial. The sooner feminism abandons this goal, and stops teaching that women should have bizarre expectations of themselves and society - and stops SHAMING them when they reject the nonsense - the sooner women can get comfortable making the decision as to whether reproduction is either going to be truly desirable or even a possible part of their life plans.