Yes, but there are couples who may disagree with each other or other family members may pressure them too.
Example:
One couple I know, had one son, then husband said, we should wait, then he said we are Ok with just one. She did not want to agree but then agreed to wait.
Few years later, when the son became over five, they decided to have a child.
To date they have no second child (boy is over 9 years old now), even though now husband wants to have another especially when he saw his siblings have multiple kids.
Adoption is not they want unless it is family child, but family members obviously not wanting to give them their child.
She cannot conceive for unknown reasons.