Supermodel Heidi Klum has said she and husband Seal are open to having more children in the future.

Heidi, who is expecting her third child with the singer, spoke about her pregnancy during an appearance on the Ellen Degeneres show.

The supermodel said the couple expected to find out the sex of the child at the end of the month.

She also said they “weren't planning" on having any more children, "but we also weren't not planning either”.

Heidi added: "We were kind of leaving it open. We were always looking around the table and always thought one more would be nice.

“And we kind of took one baby at a time and every time we thought yeah, one more that's it.... But I think now it's the first time I feel like this is it."

The couple were forced to confirm the pregnancy last month following widespread speculation in the media.

Heidi and Seal married in Mexico in 2005 and have two children together - Henry, 3, and Johan, 2.

The supermodel also has another child, 4-year-old Leni, from her previous romance with Italian businessman Flavio Briatore.

Heidi Klum and Seal