I have seen a study that said that brestfeeding protected against
osteoporosis and the longer one fed the greater the protective effect.  I
can't remember the reference though sorry!
Judy.

+----------------------------------------------------------------+
| John Grundy                       email: [log in to unmask] |
| Department of Computer Science    phone: +64-7-838-4452        |
| University of Waikato             fax:   +64-7-838-4155        |
| Private Bag 3105 Hamilton                                      |
| New Zealand                                                    |
|             WWW: http://www.cs.waikato.ac.nz/~jgrundy/         |
+----------------------------------------------------------------+