A graph

I know that (/pretty much?) all my readers are male but it concerns you too, at least the ones of you who think about having children with a female at some point:

Link. A little more from wikipedia, estimates vary somewhat but the overall pattern is the same:

“Of women trying to get pregnant, without using fertility drugs or in vitro fertilization:

At age 30, 75% will get pregnant within one year, and 91% within four years.
At age 35, 66% will get pregnant within one year, and 84% within four years.
At age 40, 44% will get pregnant within one year, and 64% within four years.[15]

The above figures are for pregnancies ending in a live birth and take into account the increasing rates of miscarriage in the aging population. According to the March of Dimes, “about 9 percent of recognised pregnancies for women aged 20 to 24 ended in miscarriage. The risk rose to about 20 percent at age 35 to 39, and more than 50 percent by age 42″.[16]”