1.   Sexual hormones in sewage can cause some fish to change sex, according to research funded by the UK Department of the Environment.

2.   He said the biggest problems faced by transsexuals occurred when they decided to change their sex after marrying and having children.

3.   A suspected criminal recently changed his sex while on the run, eluding capture for nine months.

4.   Cameron, a professional photographer and author who changed sexes from female to male, trained for six months preparing for the body-building competition.

5.   If a male angelfish dies, biologists say, its female partner can change sex.

6.   Challenging a conservative society, Jin Xing recently underwent an operation to change his sex.

7.   Jimero, who wanted to change his sex, was rushed to the hospital after he had amputated his penis at home in Riyadh.

8.   She said the baby needed to undergo two operations to change his sex to female.

9.   Spawning research began when one of the females changed sex and became a male, which is normal as the species ages, Carlson said.

10.   A month after walking out on him, she told her husband she wanted to change her sex.