Gwen Stefani pregnant

Gavin Ross dale learned wife Gwen Stefani pregnant with their third child, now 6-month-old Apollo Bowie Flynn, via email, the rocker revealed to Howard Stern on Tuesday.

“The title was in capitals, ‘LOOK WHAT YOU DID TO ME NOW.’ I was like, ‘What is this?'” he jokes. “My blood pressure went through the roof, and I opened the email and it was [a picture of] the Gwen Stefani pregnant stick.”

At the time, the Bush Fontana was on tour — a bittersweet sacrifice for Ross dale, also dad to Zeugma Nest Rock, 6, and Kingston James McGregor, 8, with Gwen Stefani pregnant.

“The hardest thing about traveling now is the pain of missing my kids,” Ross dale tells the shock jock, adding that Apollo was conceived on Father’s Day 2013 — one of the few days he was home.

“Last year, I did 210 shows, so I figured, quite simply, as a dad Gwen Stefani pregnant, that’s 210 times I didn’t put them to sleep.”

Though he misses his family while out on the road, Ross dale, 48, says he hopes that as musicians, he and the L.A. designer and No Doubt front woman, 44, instill a strong work ethic in their sons.

“I like to set the example for them. I say, ‘You like this house?'” he explains. “You don’t get this house, you don’t get Gwen Stefani pregnant that pool, if we don’t get out and work.”

Bush’s new album, Man on the Run, is out Oct. 21, while Gwen Stefani pregnant joins The Voice as a coach this year, with Ross dale acting as mentor for her team. The seventh season premieres Sept. 22 on NBC.