Pamela Anderson is concerned her biological clock may prevent her from having any more children. The former BAYWATCH star, 38, already has two kids - BRANDON, nine, and DYLAN, eight, by ex-husband TOMMY LEE - but may have to resort to drastic measures if she is to be a mother again by 40. She says, "Maybe I have to find a good sperm donor. Sometimes I think I'd like to have another baby. "I really love children, and once you have two, you might as well have ten. "But if I do have more kids it'll have to be soon - before I'm 40."