FamineNevertheless, it IS medically possible.
Happily, the two important Whowhy questions (Who the hell would want to DO this? And why?) haven't been answered, so the possibility is yet to come to light. Give it 15 years and there'll be male-to-female trans-sexuals bearing children - possibly of their own, too (given cloning advances).
Oh...God....No. Why did you have to put that in my head?!