I would like to print both male and female cards for sealing to parents so when my wife and I go to the temple we can do work for all children in our family line.
Is this possible?
No. Sorry Ordinance Ready is Gender specific. Have your wife sign in for the female Ordinances. Here is a link for more detailed information about Ordinances Ready:
Another option is to keep in mind is that if males in a family need ordinances, there are usually females in the same family that do as well. So instead of just using Ordinances Ready, go to the Family Tree page of people you have gotten reservations for and take a look around for others in the families of those individuals for ordinances that need to be done. Yes, this is a bit more work because Ordinances Ready gives you sealing to parents that are the next ordinances to be done while going to the ordinance page you will see people who need other ordinances done first.
As any patron could serve as parent for male or female sealing to parent ordinances, would it be better to have ordinances ready give all the siblings in a family that are available? That way the family could be sealed at the same time.