You're free to keep discussing this topic of you wish, it's just pointless to do so because your premise is so easily disproven.
No voluntary action between individuals that harms no one can be classified as immoral.
Under no system of logic is being given life considered harm, or an immoral act.
Convincing evidence has yet to be presented for the case of overpopulation. What's usually presented are anecdotes about overcrowding in urban areas. The problem is that 90% of the Earths human population tries to live on about 3% of the Earths landmass (L.A., Tokyo, London, New York City, etc).