>both parents birth for me were also over 30, my brother however, not so lucky
Your individual experiences mean shit, so lets see if people born with inherent biological disorders have increased?
>About 1 in 68 children has been identified with autism spectrum disorder (ASD) according to estimates from CDC’s Autism and Developmental
>compared to 1 in 150 in 2000
>cdc.gov/ncbddd/autism/data.html
npr.org/sections/health-shots/2014/07/07/328132687/with-gene-disorders-the-mothers-age-matters-not-the-eggs
T>o find out if the egg cells that develop later are more prone to chromosomal abnormalities than those that develop first, Rowsey counted the number of crossover proteins in the egg cells of fetuses with different gestational ages.
>"We saw that there is an extraordinary amount of variation between eggs, and between females," he says, "but they do not vary by time."
>That is, the egg cells of younger fetuses had about the same number of crossover proteins as the egg cells of older fetuses. He looked at fetuses between 14 weeks and 26 weeks in gestational age.
>So then why does the risk of birth defects increase as women get older?
>It's more likely that there's no one maternal-age effect on eggs, Rowsey says. "There are many different factors that come into play, and we have to explain them all."
>The proteins that bind chromosomes together may degrade over the years that the egg is waiting in a woman's ovary, Rowsey says. The number of eggs that women have is also depleted over time, so there might be fewer good ones to choose from.
>Whatever the causes, the maternal-age effect is undeniable. "The rate of chromosomal abnormality appears to be hard-wired into our species," says Hassold. "The only thing that moves the dial is maternal age."
Look at that, its purely biological, and even more related to the woman's age.
