Weird assignment. I guess you could talk about how not all married people plan to have children, some get married when they’re older than child-rearing age, and how the marriage ceremony should focus on the two planning to get married, not the family they may or may not intend to have.
Or you could just not do it, since religious education classes are crap. I’m not religious, but even for somebody who is. . . I’ve taken the classes before, and they just keep telling you the same few things repetedly. Maybe yours is different, but christ, I spent like 5 years of hearing the same things over and over and over again.
There could be fertility problems which would cause more upset if the couple thought it was expected of them to have children.
Also how far would they be expected to go in the attaining of getting pregnant. They would feel more torn with the ethics of medical intervention versus accepting no children.
Continuing moogles point there could be a case where the child born would have deformations or a bad sickness that they could know about before they choose to have a child. eg if the mother has AIDS, then the child would also. Shouldn’t it be the couple’s choice to whether there should be prayers for a child?
There is also a new problem to this: the marriage of same sex couples. Unless the prayers for a child include adoption.