But it didn't take long for the comments - which I can only hope were tongue-in-cheek - to start piling on.
"She should have to resign, she can't run NZ and look after a child how it should be looked after.
"That's lovely . . . But how in the WORLD is she going to run the country at the same time?
"I didn't realise she was married.
"The PM needs to give 100 per cent. She can't give that when having a baby."
If I weren't reading these comments on the internet, I would have sworn I'd been transported back to 1950.
Ardern has made it clear she will be taking six weeks off once the baby is born, but her partner Clarke Gayford will be their child's primary caregiver.
When she returns to work she will be just like any other prime minister who had children at home.
I don't recall anyone questioning how Bill English was handling running the country while being the father to six children.
Blimey New Zealand, we were the first country in the world to give women the right to vote. The fact there are still people, 125 years later, who believe mothers are incapable of having careers, is ridiculous.
And it's not like Ardern will be the first woman to juggle her job and being a mum. Kiwi women have been doing it for decades - my mother, aunt and grandmother included.
Being part of a country that proudly proclaims how enlightened and progressive it is, we should be supporting our leader and treating her exactly the same as her male predecessors, proving we can and do live up to that reputation.
Jacinda, from one career-driven woman to another: You've got this.
