And the rugby player admitted he didn't expect it would have been something welcomed by his wife, who is the daughter of Princess Anne and her ex-husband Captain Mark Phillips.
He laughed: "Imagine just saying, 'Oh by the way, I'm heading off, probably going to St Tropez just for the weekend.
"Just at their hormonal high - hormonal best, you know."
Amid the rise in popularity of the "baby stag", Iain - whose wife Laura Whitmore gave birth to their daughter earlier this year - admitted he would have found it helpful to have had an event where he could share the "stresses" fathers-to-be experience.
He said: "It would be nice to be down the pub talking to your mates about what you're finding difficult about the pregnancy, even if it is categorically easy for a man."
But Ore - who has son Roman, three, and daughter Genie, four weeks, with wife Portia - felt stepping into parenthood was a milestone that couples should celebrate together.
He said: "My wife discussed going on a baby moon, and I think doing it together, I think that's probably the much better way to kickstart this new chapter in your lives."