Here are two excellent articles about the issue by Dominicans. Because St. Thomas Aquinas enlightens the way Dominicans speak and write on moral issues, the hope is to help people see the the Truth and desire it for themselves.
See if you are able to see such a way of teaching and preaching in these two excellent articles on contraception. The world needs more preachers of Truth - come join us!
The first is from the papal theologian, Fr. Wojciech Giertych OP:
On contraception and the coming violence: Interview with Pope’s personal theologian