Narrator: This is Science Today. For the first time, researchers at the University of California, Davis have mapped at least six genes that have major effects upon reproduction and response to fertility drugs. Jimmy Spearow, a research geneticist, says this may greatly help control response to fertility drugs.
Spearow: One of the real problems with fertility drug treatment are that some women don't respond at all, have a very little response, some have an intermediate response and some go totally off the charts. So they have to modify the drug treatment as the treatment procedure goes on. And one of the real problems is that some women are hyper-responsive and this can lead to all kinds of other problems and it can even be lethal.
Narrator: Once researchers can map and identify these genes that control the response to fertility drugs, Spearow says they can do a better job preventing some of the problems.
Spearow: So we can find treatments which will allow each woman to achieve the desired number of conceptions.
Narrator: For Science Today, I'm Larissa Branin.