Adele's womb is "starting to ache a little bit" now her son is approaching the age of four.

The 28-year-old singer is mother to Angelo with partner Simon Konecki. But Adele told the audience at her concert in Nashville, Texas, on Saturday night (15Oct16) that Angelo's advancing years are making her pine for another baby.

"My son is about to turn four very, very soon," Adele told the crowd, according to Britain's Daily Mirror newspaper. "I’m starting to get very emotional about it because I feel like once they turn four, they’re not really your actual baby anymore.

"So my womb is starting to ache a little bit. It’s like, 'Baby, baby, baby. Need a baby, need a baby!'"

However, Adele denied she is already expecting, adding: "I’m not pregnant. I won’t get pregnant until the end of the tour."

The Skyfall singer's 107-date world tour is due to come to an end in November (16).

Adele's comments on Saturday night are a stark contrast to those she made in July, when she told the audience at her Minnesota concert that she wasn't planning to procreate again anytime soon.

"I don’t think I can have another child. I mean, I can. But I don’t think I want two," she said.

Adele has embraced motherhood since welcoming Angelo into the world, and is said to be planning to take a hiatus from the music industry when her tour finishes so she can fully focus on her family.

Speaking to U.K. TV host Graham Norton earlier this year, Adele explained just how much her world has altered since becoming a mother.

"It's changed me completely, in every single way possible and something much bigger than myself happened, and I had been craving that without realising," she said.

"I was always yearning for something and I never knew what it was."