The pope used that phrase?
The Pope used that phrase, but disparagingly, i.e. he is saying that this crude expression is not the doctrine of the Church.
He has often praised large families.
Bringing children into the world is never a 'mistake': Pope Francis
Don't be afraid to have more children: Pope Francis
Pope Francis to large families: you are a gift to society
Pope Francis: Large Families That Welcome Children Are A True Gift From God