There's nothing wrong with the debate though, even the man who wants to prevent her from getting his job, Bill English, has waded into it saying it's entirely her business.
But is it? If you swim with the fish in the political bowl, most things are up for the asking.
Helen Clark was once even asked whether she was a lesbian, to which she replied she'd been happily married for 23 years at the time.
John Key was asked whether he was planning to have any more kids and he made many squirm by telling the nosey parkers that he'd had a vasectomy.
Ardern's been asked since stepping up whether she was up to the job, which again is an entirely fair question given the views she expressed in that Next article.
Talking about becoming Labour's deputy leader she said the pressure and anxiety had ballooned since she took over as second in command, adding that it would be unmanageable as leader!
Ardern talked about the weight of responsibility as deputy leader and couldn't imagine doing much more than that. She's a worrier and said there comes a point where certain jobs are just bad for you.
But if she does pull it off on September 23rd and becomes Prime Minister she should just go right ahead and have kids.
There'd be one person, flashing his pearly whites in his double-breasted suit, who'd be more than willing to step up to give her at least 18 months parental leave.