God’s ways are not necessarily your ways. You either believe in an omnipotent, omnipresent God or you don’t. It is His design that certain eggs will succefully implant, and others will not. It is not for you to artificially make things inhospitalble for implantation to take place. You are trying to put yourself in the seat of God.
The realm of creation of human life is and always has been with God. That God decides not to allow every egg to be implanted is His decision, and His alone. We participate with God through the marital act. We are not to interfere with His ways and plan in the creation of human life or to do anything that shortens it, until natural death occurs.
mikew, “your arms are too short to box with God!” (quote stolen from Fr. John Corapi)