Preimplantation genetic diagnosis... What do you think?!?

Question

Pre-Implantation Genetic Diagnosis (PGD) is a test that screens for genetic flaws among embryos used in in vitro fertilisation (IVF). With PGD, DNA samples from embryos created in vitro by the combination of a mother’s egg and a father’s sperm are analyzed for gene abnormalities that can cause serious genetic illnesses. This procedure is harmless to the embryo, as it occurs about three days after conception when the embryo is at the four to ten cell stage of development, a point at which the cells are totipotent.

Now, this will mean that some embryos will be disgarded... But PGD could conceivably eradicate all human genetic disease....
While PGD does raise major ethical questions, this scepticism is a little misplaced. Far from PGD devaluing the worthiness of the life of a child suffering from a severe genetic illness, it gives us our first glance at the possibility of entirely eradicating these illnesses.

Answer 1

I've always believed that Life begins at implantation.
This is an educated opinion. I have a degree in Biology.
Generally speaking I think this a good and interesting test.
However, it borders (and may step over the line) of blaspheme. Do we really want to remove God and natural selection from the beginnings of life? This a question worth debate, but I feel I need to ere on the side of being conservative.
This is noble to want to eradicate disease but this may be too much.