I just wanted to say that your journey really touches my heart.
My parents were also married for 8 years. My mom could get pregnant, but could never carry. They then chose to create their family through adoption. And for that, I am eternally thankful. I am their third (and youngest) child. Adoption for them was a different journey than it will be for you, as adoption has changed a lot in the 27 years since my birth. However, they too had to come to the acceptance that a biological child was not in their future.
It takes a strength that few understand to come to that acceptance. You (an all the ladies here) are so strong.
If you (or anyone else) have any questions from an adoptee perspective, please do not hesitate to ask. I also have contact with my biological mother.