That implies that women have a greater biological imperative to reproduce than men. I don't know that that's true.
Honestly, I see my "grad school clock" as an equally big, if not bigger, problem than anyone's biological clock. When you do a startup, you have to choose your priorities -- the implication is that neither kids nor grad school are amongst them.
Women certainly do have a greater biological imperative to reproduce than men. It's for the very simple reason that a woman's fertility starts declining in her early 20's and bottoms out around age 40 -- a man's fertility erodes very slightly and is usually in perfectly serviceable condition at age 60.
Kids take a lot of time, granted. But grad school? It takes 4-5 years (1), and during that time, you can work on your startup part time. You also develop technical skills, which you can later use to work outside the (somewhat crowded) webapp space.
(1) The average is 6 years, but that includes lots of lazy people, future college teachers, people who enjoy grad school, etc. Potential startup founders would almost certainly be faster.
Honestly, I see my "grad school clock" as an equally big, if not bigger, problem than anyone's biological clock. When you do a startup, you have to choose your priorities -- the implication is that neither kids nor grad school are amongst them.