I wanted to chime in. I'm 44, I had my first child athe the age of 21 and my last, # 4, at the age of 41. When I began the pregnancy I was 270 lbs.... I gained a whopping 5lbs. during the pregnancy and baby weight 5lb. 3oz.
But more to the point... as mentioned by others, age becomes an issue and certain risks increase, namely, genetic defects or difficulty conceiving, especially if this is your first child. You can have genetic tests done as early as 11 weeks into the pregnancy, I did! The test is called CVS (Chorionic Villos Sampling). They take a small sample of tissue from the placenta. My results came back and I was told that I was having a boy and it also showed trisomy 21 (Down Syndrome). All I knew at that point about Down Syndrome was that meant my baby would be mildly or severely ******ed. My OB/GYN suggested the testing because he felt at that point it would be early enough to abort if defects were found. While waiting for my results, I made up my mind that abortion was not an option for me... I already loved my little bean. I agree with lulu, that Down Syndrome is nothing to fear... but admittedly, my opinion is biased.
Although my son has DS he was born "healthy"... in that, he had none of the problems or known defects associated with Down Syndrome.
No one hopes or dreams they will have a child with DS... I didn't but I educated myself, and found my knowledge of Down Syndrome was very outdated! I soon learned that people who don't have personal, or daily experience with DS don't give the best advice... even, my OB/GYN decided (and for no other reason) I was "high risk" because of the CVS result and "referred" me to a high risk OB. He implied I should abort and gave me phone #s to clinics.... I'm so glad I did not listen to him. I'm sure this does not apply to most OB/GYNs, but this particular one painted a really bleak picture. The genetic counselor and new OB said there was nothing high risk about my pregnancy.
My best advice would be to research, research, research. Everyone's situation can be different.
I also agree that this is a highly personal decision.
You have gotten and will get various responses, but the decision will be yours.
If you're interested, PM me, I can give you a link to a group of over 40 moms... this is a group of women trying to conceive, are pregnant or have given birth after 40. They were a big help to me.
I wish you luck in whatever you do!
My little angel Isaiah...