First, we highly medicinalize what should be a natural thing. Boy meets girl, girl falls for boy, they mess around in the back of boy’s parent’s Trans Am, girl gets pregnant, viola! The next generation grows. Now a days, though. Boy is probably closer to ‘man’ than ‘boy’, and girl is definitely ‘woman’. The eggs are no longer the spry things they once were, and more times than not, it just does not happen.
In old society, that was it. If you waited until you were out of your teens to start having kids, you were a day late, a dollar short, and there were no heirs. With fertility treatments, nearly everyone can have a kid when they’re well past their prime. Don’t want to wreck your body, through the magic of modern medicine, your egg, the husband’s sperm can do a little dance and wreck a third person’s body for all eternity.
Moving on, once you DO get pregnant, be it at 15, 25, 35, it is suddenly treated like a disease. You’re health is micromanaged. Diseases and conditions that would normally off a weaker mother (hypertension, incompetent cervix, poor placenta growth) is monitored and treated, saving mother and baby.
But, sometimes not all pregnancies make it that 40 and some odd weeks, and the baby is born before she is done cooking. Babies that would normally have died (as found in the top NICUs) are being kept alive months before they were even set to be born. This leads to sometimes seemingly normal people with underlying issues that they pass along to their next generation.
Think of genetics as Kool-Aid. You start off with one quart of cherry, that is very sweet and very strong, a nice, robust red color, firm flavor. Then you start sharing it, maybe adding kool-aid from another person, and topping it off with water to make a quart. Do that enough times, and your once cherry flavor might taste a lot more like watered down orange.
This is not a say that we should all strengthen our genetic pools and only stick with our own race. That’s a three legged kid waiting to happen. But if you know you have a family line of mental illness, maybe you shouldn’t try and have kids with that guy you met when you were institutionalized.