There is so much emphasis on having a first child, that no one really talks much about the ones that follow. What if you had the easiest time conceiving, carrying & having your first child? What if you thought conceiving, carrying & having a second or third child would be just as easy as the first? What if you were wrong?
The term is called "secondary infertility." And, apparently, it is a common problem. Often times, people who have a relatively easy time having their first child, now run into challenges trying for additional children.
Check out this informative article from Parenting Magazine, on secondary infertility.