One day, I stumbled into lab, apparently looking fairly love-struck (i'm a man, and was seeing a new girlfriend), and he said: "dekhn, if you want to be successful in science, you can't have a wife or a girlfriend or kids. They are a distraction and to be successful, you have to dedicate your whole life to science. Nights, evenings, everything. A wife and kids will just waste your time".
I'm glad I ignored his advice and got married to that new girlfriend (and had kids, after establishing my career). He later narrowly missed out on the Nobel Prize and married his postdoc. But he was right: to be truly successful in science today, unless you're a charismatic genius, requires an extraordinary level of dedication- and a lot of family support.
That said I'm surrounded, in my job, with successful women scientists who came from academia and have kids. This sometimes leads to weekend meetings where both of us end up saying "Oh, I have to go now to take my kid to soccer"...
[edit: I realized I left out an important bit. Both my wife and I got phds and have professional jobs. But I optimized for high salary and status, while she optimized for "freedom"- the freedom to drive kids around to activities, etc. Which in some sense, I guess, is just another anecdote supporting the paper.