Actually, I have four friends who all conceived naturally after 40 and had their babies with no complications. All of them were surprise bonus babies.
#1) An old boyfriend's mom was 45 when she got pregnant with him (#5), 46 when she delivered. Her youngest at that time was 10 and she had just re-entered the work force as a loan officer at a local bank. She went on to have fabulous pregnancy & wonderful vaginal delivery. She said it was her best pregnancy and she wouldn't change a thing, even 32 years later.
#2) In 2006, A dear friend at church had just turned 46 when she got pregnant with #6. Her youngest son was eight, her oldest son had just gotten married and her oldest daughter graduated from college the week before she found out. Her husband was...SHOCKED. (As was she!!!) She had just graduated from physical therapy school with an MS and had landed her first job. She went on to deliver naturally, at home, in water with a fantastic midwife. (As a side note, she was taking care of her 91 year old mother at the time she found out she was pregnant - her mom was 45 when she had her!!!!)
#3) In 1993, my mom's best friend (my auntie for all intents and purposes), was 47 when she had #9. Her youngest was 11. She had just graduated with her Ph.D. in English and was starting her first year teaching at a nearby university. The pregnancy was a little scary because they told her the baby had severe deformities and would be Down's Syndrome. They advised her to abort, but she refused. Her daughter was born vaginally with no complications for either mom or baby. Little red-headed Jules is about to graduate from high school two years early & has received a full academic scholarship to her top-choice college.
#4) In 2003, the secretary at school was 49 when she found out she was pregnant with #4. Her youngest was 17 and at away at college!!! Her husband is about 14 years older than she is and needless to say, was...well, you can only imagine the shock. She was diabetic on top of her age and so it was a bit scary at times, but she was able to manage her diabetes very well during the pregnancy and ended up having a beautiful little girl, who is now five. The cutest thing is that her Daddy dresses up like Santa every year and have the most adorable pictures taken of them together!