domingo, 26 de mayo de 2019

BioEdge: Will IVF affect human evolution?

BioEdge: Will IVF affect human evolution?

Bioedge

Will IVF affect human evolution?
     
Natural selection is one of the principal mechanisms of evolution -- “survival of the fittest”, as it is popularly known. What happens when this collides with IVF, which is a technology for allowing “subfertile” or “disease prone” couples to have offspring?
This is the question raised by Dr Hans Hanevik, a Norwegian IVF specialist, at the annual meeting European Society of Human Reproduction and EmbryologyHe writes in the abstract of his talk:
IVF is not just a treatment for infertility, but also a technological intervention at the point in a human life cycle where natural selection operates at its strongest.
Although IVF is a great medical achievement, it circumvents a range of pre- and post-zygotic reproductive barriers. It increases the reproductive fitness of subfertile couples by technologically removing several naturally occurring selective barriers and by altering other such barriers.
With IVF babies reaching 4 or 5% of births in some countries, Dr Hannevik concludes that humans will become symbiotically related to technology:
In accordance with the basic principle of evolution, the subsequent generations will thus be genetically and epigenetically adapted to an environment in which reproduction is increasingly dependent on technological intervention.
Michael Cook is editor of MercatorNet
Bioedge

We cover a wide range of issues in this newsletter, ranging from whether brain-damaged Frenchman Vincent Lambert should be allowed to die to whether IVF affects human evolution.

But today I’ll address a nuts-and-bolts issue– how to make comments. We’d like to encourage debate and fresh ideas in the comment box below each article. However we realise that it is a bit clumsy and hard to use.

There are no perfect commenting systems. We use third-party software called Disqus. It works well and allows us to moderate comments. But the best way to make a Disqus comment is to sign up for Disqus. It’s easy and quick.

Unfortunately – and understandably – many of our readers are reluctant to sign up for one more social media system. The solution is to post as a “guest”. But Disqus makes this a bit difficult.

So here’s how to do it. Type your name (or pseudonym) into the “name” box. Then two more boxes appear. Type in your email AND tick the box “I’d rather post as a guest”.

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Michael Cook
Editor
BioEdge
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