"The chalice of benediction which we bless, is it not the communion of the blood of Christ? And the bread which we break, is it not the partaking of the body of the Lord? For we, being many, are one bread, one body: all that partake of one bread." (1 Cor 10:16-17)
A tale of two IVF doctors from EWTN News. And while nothing is simple, I do believe that a thorough consideration of every aspect and implication can yield clarity. The linked article can provide some of that.