But Lachey jokes that he plans to witness the baby's birth from the "waist up"
And when he returned to co-host with Ripa on Tuesday, the excited dad-to-be kept the baby talk going.
Asked if he’ll be coaching Vanessa, 31, in the delivery room, Lachey, 38, outlined his game plan.
“I’ve been told – because that’s what happens now, I’m told things – that it’s going to be a waist-up situation, if you know what I mean,” said Lachey.
“I’m gonna be there, I’m gonna be supportively there, holding hands, and coaching, breathing, all that good stuff,” he continued. “But apparently I won’t be down below, seeing what’s happening. I’ll be up above, helping.”
“My work there is done!” he added with a laugh. “I was successful there. So we’ll keep it waist-up.”
But he does have experience with all angles in a delivery room. Lachey told a horrified Ripa that he videotaped the birth of a friend’s child a few years ago.
“I asked him, ‘How do you want me to handle this, do you want me to get in there and get the detail?’ And he said, ‘Yeah.’ We all got very close that day.”
Despite the up-close-and-personal biology lesson, Lachey says he had a surprising reaction to the experience – and one that’s sure to please his wife.
“I didn’t expect it to be what it was,” said Lachey, “but it was a really incredible, awesome moment.”