What is the Catholic Church’s view of single women who pursue motherhood through a sperm bank because they have no other option?

Here we have a very clear example of how uncommon common sense has become in our culture. Our culture’s emphasis is clearly on "Me"—to such an extent that a woman can easily become so blinded by concern for her "fulfillment" that the needs of her children are reduced to an afterthought, if that. But every child that is conceived by the uniting of egg and sperm has a right to a mother and a father—not a mother and a sperm donor. To pull the conception of a child out of the context of the parents’ mutual love for one another is to sin against God’s design for the human race. To deny context is always a lie. A sperm bank is no match for marital love before and after conception. God created parenthood principally for the benefit of the child. But our culture puts the cart before the horse so that parenthood becomes a matter of ego reinforcement. This inevitably occurs when we begin to put concern for what we want before concern for what God wants.