But Pugh, 29, tells WD the pregnancy hasn't been plain sailing.
"Weeks seven through to 17 weren't great. And it was hard, because it wasn't like I could tell people why I was so poorly. But a few people probably cottoned on after the fainting."
Pugh suffered constant nausea and dizziness, and was admitted to hospital a month ago with acute migraines.
She also had trouble falling pregnant, saying she and Barus, a 40-year-old musician, had been trying for six months.
When she finally fell pregnant, she had to have a blood test after a faulty home pregnancy test gave her a false negative.
"We are so excited. So, so excited ... (Jo) came home that night with a huge bunch of flowers, a pink potted plant, a blue potted plant and a big sign that said, 'Is it a boy or a girl?' It was the sweetest thing."
Pugh said she waited five months to tell people because "I knew it would become everyone else's business".
"We thought, 'Let's just have it as our thing for a while.' But I'm really happy to be sharing the news now."
She also said she wanted to return to her job presenting Breakfast after the birth, and was keen to talk to Pippa Wetzell and Toni Street about how they "juggled a newborn and still did the crazy Breakfast hours".
- nzherald.co.nz
