Pregnant former Playboy playmate Kendra Wilkinson is planning to undergo surgery after her second child is born later this year (14), so she can't have any more kids.

The expectant mum, 28, insists she won't want another child and so she'll be taking steps to make sure there are no baby mistakes in the future.

She tells Life & Style magazine, "I'm trying to tie my tubes! My doctors say I'm too young. But I am extremely done; I want no more! This pregnancy has been a lot harder than my Li'l Hank's."

Her first child with husband Hank Baskett was born four years ago. The couple is expecting a little girl in May (14).