On the Orkish females, perhaps they were similar to Dwarves in that the women (it seems strange to call Orcs women...

) were similar to the men. If you think about it, the places where there were real Orc "settelments" (Isengard, Mordor, the Misty Mts, to name a few), they were multiplying fairly rapidly indicating the presence of females. However, when Saruman sends his army to Helm's Deep, Isengard was completely emtied. I cannot see Orcs sending their women and children off to someplace safe like Men did in Minas Tirith. In
The Hobbit, the Goblins basically empty their mountain hold to take revenge on their king. The logical conclusion is that the women went to fight alongside the men, odd as this may seem.
In addition, Orcs don't seem to be the type to have wives/mothers stay home and cook and clean.