Yeah sorry about the duplication--the reason I made a different page was that Children and reproduction felt like it was already covering a lot of content, with most of it at the later stages of childbearing: the actual pregnancy, giving birth, raising children. Since I wanted to add content about changing pregnancy chances beforehand, and it felt like there'd quickly be a lot to add, from fertility factors to the contraceptives, it felt like it was enough content, at a different stage of the process, to warrant a new page. Part of the duplication is because I added fertility stats to the natural pregnancy section of the Children and Reproduction page a few days earlier since it was the closest spot I could see to put them. However, there's so much that goes into fertility and those chances that I'd like to see a page/section that goes into them in much greater detail than Children and Reproduction currently supports.
If you wanted to merge them back to Children and reproduction, then maybe adding new sections on fertility (since it applies to both natural and artificial pregnancies) and contraceptives would be helpful--it just seemed like the Children and reproduction page was getting pretty full of topics already.