Hi OP,
I have a 6 year old with DS. He's our absolute world. He is clever, can speak 2 languages, can read and is reaching all educational milestones for his age. He is incredibly funny and charms everyone he meets.
He is very physically able and does gymnastics.
He was born with 2 holes in his heart that were fixed at 3 months old and apart from his surgery scar, you'd never have known now as he's so active and full of energy. We are apart of a large charity called Positive About Down Syndrome, they have an expectant parents group on Facebook and an excellent website, please do look them up. 50% of babies with DS have a heart condition, but most of these are fixed extremely easily these days with the medical advances we have now.
I will also point out that older adults with DS these days may have never accessed a full education and definitely weren't born into a world with the medical advances we have now, so they are not a great marker for what to expect in adulthood of a child with DS born today.
There are 3 types of Down Syndrome: Trisomy 21, Translocational Down Syndrome and Mosaic Down Syndrome. 95% of people with DS have T21, 3% have TDS and 2% have MDS.
After having my son, I had genetic testing which revealed I actually have Mosaic Down Syndrome myself. I was late to talk and had some social differences growing up, school said I was a bit 'slow' 🙄. However, I went onto get my GCSEs, 4 A levels, a BA, an MA and a PGCE.
Down syndrome is not a spectrum like autism. There are different types, but what causes the differences in people with T21 is co occurring conditions (like autism, adhd, hearing loss, sight issues, thyroid conditions) and just different personalities. Also, early intervention is key. I know some teenagers whose parents didn't get the best advise re early intervention and have had to work a lot harder with speech and education. The parents I know who have had great support (through the charity PADS I mentioned above), have children who are really thriving developmentally.
It's a hard decision to make, I had an amnio when I was pregnant with my DS, but so glad we chose to keep him. He's everything we ever wanted in a child.