I'd want to be woman 1, I feel I could best use her position to bounce to where I'd like to be.
The thing is, you can't literally have it all in the sense that there are only 24 hours a day. Where I am currently is not that far from woman1, though I'm only pregnant with my first but I already work four days a week in a job I worked hard to get that is prestigious to some degree but not well paid (I'm a senior manager in the charity sector; this was always my goal and never going to make a fortune)
I started to think about balance and family a few years ago. Basically, I think you need to decide what specifically is important to you about the career. So woman 1 is in law- I know lots of lawyers, I appreciate she won't be a partner in a top tier law firm working three days a week. But there are options, esp at a certain level, you just have to chose. So- does she want the job to be as stimulating as possible? I know friends who went in-house as somewhat less demanding, but found it more boring. Does she want it to be as high paying as possible? Or as prestigious?
For me, having power/influence, a certain degree of respect among my peers and life/work balance were my priorities. So I took a senior level job at a small NGO which is highly respected but pays less than a major charity I used to work- basically I took a number of steps up the career ladder with limited financial reward, when I could have stayed and earned more money, but I am passionate about the work, have the power to influence decision making, and am in a role that does get a certain amount of respect from people whose opinions I value. It's also four days a week and flexible which will be invaluable once this baby gets here.
It's v easy to get stuck on a treadmill, but if I were person 1 I would be looking at sideways steps that could either keep me at a less strsssful four days a week; or move me to a three day a week role, but it would depend on priorities. I know a formerly super stressed City lawyer who set up a tiny niche practise with another lawyer and is doing really well: they're both experts in this one area and they have the flexibility that while
Sometimes they work crazy hours they can choose the work flow.
My current role has been carefully chosen as one I can stay in for five-eight years without it looking strange, then bounce over to another role that may be a bit more demanding once I'm through the small children phase if that's what I want. (I know not everything works out as planned, but I like to think I have some options anyway) I honestly think woman 1 could do something a bit similar.
For woman 2, I agree with others: wanting children and not having them is v hard. I would struggle most with her life eighth now as there is a closing window ahead of her and that is impossibly stressful. Woman 3 has options still, and mostly needs to reframe her perspective and accept she made choices to her here And is really well placed to make choices to get somewhere else.
But on balance I think woman 1 is best placed to put things in place to have more or less everything she wants.