After a pregnancy servicewomen are not returned to the front line for at least six months.

BBC: Baby birth shock for soldier on Afghanistan deployment

It's known as the Appeal for Redress, and all of the signatories are active-duty servicemen and servicewomen.

NPR: Members of Military Make War Views Known

The Washington National Guard has criticised two servicewomen for being photographed in military uniform while breast-feeding their babies.

BBC: US military in row over Facebook breast-feeding picture