Health is highly personal, so my health problems may not be yours, and that's a good reason to think critically about my comment. That said, I will caution that though my first pregnancy was classified as high-risk due to my weight and "advanced maternal age", my other health problems identified in late pregnancy were unexpected.

Before I get into my health problems in particular though, I do want you to

Chart of AMA vs. Chromosomal AbnormalitiesNCBI Study on AMA and Chromosomal Abnormalities

I think the best way for me to list my health issues for your purpose is by splitting them into separate groups of "possibly affected by age" and "general pregnancy woes".

B

First, the general pregnancy woes: