Actor Channing Tatum broke down in tears as his wife Jenna Dewan-Tatum went into labour because he felt powerless watching the Step Up beauty endure so much pain.

The actress gave birth to the couple's first child, Everly, in London in early June (13) and the Magic Mike hunk admits he spent most of his time in a hospital bathroom trying to get to grips with his conflicting emotions of impending fatherhood.

He tells U.S. talk show host Chelsea Handler, "It's like someone's hurting, someone that you love, and you can't do anything about it. You physically cannot help... I probably went to the bathroom four times and had a crying fit. Like, I'm just like, 'I don't know what to do!'"

And Tatum insists he's developed a new-found respect for women after watching his daughter's birthing process, adding, "There is a real reason why God did not give, like, (guys) this ability to have babies. Because we would not be able to do it... Men are useless."