@motherone i'm sorry to hear of your miscarriages but delighted you have your son.
We have a birth dd and I was told I would have no more with my eggs. Years later and many attempts, including donor eggs, and the doctors were right. When dd was 9 we adopted a little boy of 3.
My son is relatively easy but that is probably because my birth child is on the autistic spectrum and is very difficult at times.
All adopted children have suffered the loss of birth parents, and many will have had losses of foster carers so many losses before finding a family.
The fact they are sometimes very young when that happened does not mean it doesn't leave potential issues for them.
Many, like my son, will have experienced neglect at an early stage in life. This can lay down a sort of blue print and mean their brain does not develop in the way it should. Theraputic input, good nurturing etc can help to turn these things around but it is not easy and it does require work. Our son has been with us over 5 years and we are again getting some post adoption support to help him.
@hairtoss wee the children adopted at birth in the UK? It's quite rare but does happen through something called concurrent planning, I think, or foster to adopt.
Teachers and people who meet our on find him a delightful (and gorgeous - if I say so myself) little boy and many would not guess he is adopted. He can keep some of his challenging behavior for home. Just as my autistic daughter does.
For me adoption is 100% worth while and great but it is not easy.