@SimonJT I don't see the point in creating motherless or fatherless children to satisfy your own needs when there are plenty of children in the world in need of a loving home. Sadly these children are guinea pigs because we don't know what affect disconnecting them from on of their genetic parents will actually have on them. Adoption is a solution to a sad state of affairs and anyone who wants to adopt should be welcomed and supported.
In nature we have children and stay with them. This goes against nature and I'm sure with that there are emotional consequences because of that, consequences to be faced by the children not the adults. Abandonment, divorce, losing a parent, trauma, are all things which would very much affect a child. Why do we think that robbing them of their mother or father, on purpose, would not have an affect of them? Frankly, we're messing about too much playing God because we have the science, and in some countries, a hugely profitible business, but for me we are lacking the ethics, especially since there are plenty of children who would welcome a loving home.
My opinion on this won't change. For me, it's wrong and incredibly selfish. Those two little girls will grow up and guaranteed there will be times when they will wonder to themselves what it would have been like to have a Mother.