>>519204706
Well yeah, she is over 30, it's going to be hard. Women are fertile from age 14 or so (this is getting earlyer and earlyer), because that's when, biologically speaking you should be having kids. The optimal age for kids for women (speaking strictly biologically not socially or finantially) is 23. You may have heard menapause happens around age 50 and thought that means it all works fine untill then. But in reality fertility starts decreasing from around age 25-30 significantly.
If you are interested in the underlying mechanisms, i'm happy to talk about it, but TL:DR, womens oocytes (the thing that fuses with the sperm to make a kid) is developped when they are embryos themselves, and are stored for life, untill they run out. But the "storage" is not perfect. As time goes on the genetic material within degrades, so fewer and fewer are actually viable. So any month where an unviable pair are maturing, she is in effect infertile.