It is true of course that there are occasional genetic abnormalities that themselves cause incompatibility. But some technologies overcome very discrete and limited problems with individual steps of the reproductive process; for example, a sperm count may be very low but of high quality, resulting in infinitesmal odds for successful natural reproduction, but quite reasonable chances of conception with intra-egg injection. If DNA testing of sperm reveals problems, as it sometimes aoes, your approach would be valid.

Many families cried for the young who died for not being resistant to germs so they had larger families. Now we have immunisation and educated parents have smaller families as a result. We also have sex-selection by aborting the female (sorry complaints? It's only a fetus), and very soon for the happily married homosexual couple select their zygot, (they may never find the Gay-genome, but two Deaf lesbians in America were able to seek the seed of a Deaf homosexual male to pass the Deaf-gene to their baby boy).

Immunisation has given the rise of sink-estates and the easy gift of power to Socialists to rule over them, (Socialists cannot rule people smarter than themselves), male-sex selection has provided massive armies of disaffected soldiers for Communist Nations, and gene-selection gives cures to Communists leaders who were heading for early senility.

If your White skin blisters in the sun, go and marry a nice Black girl. This is natural selection. Don't look for a gene-cures that turns your children orange. That recessive iguana gene will pop up most unexpected.

So, I can see this is another medical-drug company ploy to exploit vanity. And Socialists are very vain. Self-indulgent lifestyles that led to disease of body and mind will be a thing of the past. Fascists simply wanted a super-race in their own image - just brighter, bigger, faster and stronger than anyone else (in an inadequate sort of way). Communists want you to know your place. A point-system of diversity of unnatural selection that keeps them in their exulted place - geddit?

There's no money in prevention, but loads of money in cures. Go ask a doctor.

This zeroing in on the double female is the one surefire away of detroying the family. The double male is a curiosity which must biologically, by definition, die out.

How odd since the Times reports:

"Human sperm and eggs will be grown from stem cells within five to fifteen years but the technology will not allow gay and lesbian couples to conceive children with genes from each partner, an international panel of scientists predicted yesterday."

Amazing how newspapers twist things to suit their own prejudices (which in the Telegraph's case includes I would suspect bashing people of alternate sexuality).

Secondly though I have say that I'm totally opposed to any sort of mucking about with reproduction taking the view that we don't yet understand the reasons why couples can't have children sufficiently to override that fact. While not totally in favour of eugenics I do think we should consider the long term consequences of by-passing little understood mechanisms that prevent two particular combinations of genes to create a viable child naturally.