The verb bear has two past participle forms, born and borne. Born is used in the passive voice and as a participial adjective whenever the topic is birth: She was born in Ohio. We are New England-born, all of us. When the topic is birth, use borne as the past participle, as in She has borne three sons—but only in the active voice (i.e., do not say The baby was borne to a very young woman). In the senses of bear that involve carrying, enduring, proving, and the like, the past participle is always borne, whether the verb is active or passive: He had borne his guilt for many years. It was an insult not to be borne even by a placid person. Spelling errors are frequent, particularly borne for born when the topic is birth but the use is passive or adjectival http://www.bartleby.com/68/35/935.html

Currently, every single verb involving "bear" is given as "bear ... bore, born or born".

However, "born" is only used in the meaning "given birth to" (literally and figuratively, see below).

New SOED:

bear ... Pa. pple & ppl a. borne , ->BORN.

born [OE boren pa. pple of BEAR v.1: long distinct from borne.]
I pred.
1 Brought forth by birth as offspring; fig. brought into existence, started in life; destined; innately suited.

In this case, it is the only past participle form.