As for me I am 34 but will be 35 for the baby's due date thus they call me 'of advanced maternal age'.
People in 30's and 40's have children all the time but the risks do greatly go up for many different diagnoses. I work in Occupational Therapy and have worked with many pedicatrics who have had very difficult lives.....as have the parents dealing with the disabilities.
My risks were even higher because my sister had died of spina bifida when she was 4 weeks old and when I got pregnant I was taking a medication that increases your risks for spina bifida.
I am very thankful to God that through all the ultrasounds (I've had 10 during this pregnancy) they have not found any serious abnormalities........I am due for a c-section in 6 days because of a fibroid tumor but all looks well with baby.
So, no I'm not over 40 but, I am still in that age range they consider advanced. I think each person has to pray about it, decide if something is wrong with your child are you willing to take care of him/her. Disabled children can be a huge joy in your life (I know they are in mine working with them in my job) but, they are a ton of work, emotional stress, financial strain, ect...........but, like I said well worth it.
I just hate how many times in the beginning of my pregnancy that the OB asked me if I want to abort if something is wrong. I finally said nothing will ever be so wrong that I would abort, so don't ask me again...........and he didn't.
I wish you the best!