It all feels very wrong, and TechCrunch themselves pretty much acknowledge that it feels wrong (see below). So she's having Twins - I'm delighted for her. But why is that relevant to the mainstream tech journalism?
To state the bleeding obvious, it is not common knowledge if a male CEO has kids on the way. TC suggests, hopefully correctly, that it will increase her workload - which parenthood does for the father too (one would hope).
Not only does she feel the need to announce it, and this is clearly a corporate communication, but also to explain what effect it will have on her work, how the Board reacted to the news...