Hi L.!
I was just reading all the other responses and I am SHOCKED!
All these other Mothers's are very generous in their advice and opinions, and that's great! It's true that the third child brings a new dynamic to your family. It is different even from having 2 or 4; having an odd number of children versus an even number. I grew up in a family of 9 children and I have 3 of my own. We have fostered a few teenagers, as my boys got older.
Having a third child to because you don't feel "complete" set off sirens in my head. Being a parent is certainly a demanding occupation and the most important job anyone can have. Are you looking for something more to fill up your days or is there some reason to believe that your family is supposed to have another person? If you are pre-ordained, by whatever higher power you might recognize, to have another child, it will happen. Good Luck!
If you are hoping that the third child will be a specific gender, good luck again! Those two questions aside, please consider the position of your current children. How will the new baby affect THEM, financially, socially, spiritually, and physically?
After we made the decision to accept the third child that we had not planned, those were the primary concerns; "okay God, how do I feed, clothe, and nuture THIS child when I was really struggling with the first two?" I had to stay home with them, which made me unhappy, at first. They were sick all the time with ear and sinus infections. The youngest was always getting hurt, trying to keep up with the big kids. Two of them were always fighting (they rotated, so it was never the same two). When they got to be school age, we were never alone again! Our house was filled with children. We have had the honor and pleasure of being host family to foriegn exchange students and fostering our childrens teenaged friends who were at risk of not completing high school. We had to learn to dance together, for all the weddings we get invited to!
Some of these things may have happened with just two children. Many of them would not have, because I would not have stayed at home. It has been a hard road, that I would walk again. Pray about it. Think about it.
Good Luck!
B.