I think most people on this site believe a child needs a mother and a father. I also believe this to be true.
These days it is possible for a single man to have a child by surrogacy. That is his sperm, a donor egg from woman 1, a surrogate woman to give birth. The child is his biological child and if he does his research neither of the surrogate women involved have any claim on the child. For example the egg donor may be from Ukraine and the birth surrogate in India. The both get paid for their services, they are happy and go on their merry way.
What this means is that the father has the child knowing that it will not have a mother unless some woman comes along and takes this role. Rather like a mother dying in child birth (only with surrogacy you know this will happen before conception).
Now this child is being brought into the world with one parent by choice. Is this wrong?
Keep in mind that any child has at least a 50% chance of being reduced to one parent by choice any way. The mothers choice. These children have loved a father and had that taken from them = suffering.