Rapper Wiz Khalifa and fiancee Amber Rose arrive for the 2012 MTV Video Music Awards in Los Angeles. Photo: Reuters

London - Amber Rose had a miscarriage shortly before her current pregnancy.

The 29-year-old model - who is now expecting a baby boy with her fiance Wiz Khalifa - was left devastated after they lost their first baby even though it wasn't planned, which is why the couple initially denied rumours she was pregnant.

The rapper told DJ QDeezy on Philadelphia radio station Hot 107.9: "Her first pregnancy was like right before [her current pregnancy], and it was unexpected.

"Right when we found out she was pregnant she lost the baby, and she got pregnant again like right around the time we found out she lost the baby, so that second time when she got pregnant, we didn't want to say anything about it until after her second trimester and everything."

The 'Black And Yellow' hitmaker is now really excited about the birth of their first child.

He said: "I can't wait, every time we go to the doctor, he tells us how healthy the baby is, how perfect her pregnancy has been, and it has just inspired me to be the best dad. I have this little ball of joy coming into the world, I gotta show him right."

Amber previously admitted she is planning to have an all-natural water birth without the help of medical aid, and the couple confirmed they are keen to resume planning their wedding after their son is born.

She said: "I'm so ready. I've decided that I'm going to have an all-natural water birth. No medicine. I want those bragging rights! The next time Wiz has a stomach ache or anything, I'll say, 'I popped out a baby all-natural.' "

Wiz added: "It makes more sense for the baby to be in the wedding than for her to be pregnant. Some people, they rush and do it, but it works both ways.” - Bang Showbiz