Mario R. Capecchi, Oliver Smithies and Martin J. Evans helped develop a technique to manipulate genes in mice.

  Democrats say the willingness of House Republicans to stick with President Bush in the battle over a public health insurance program for poor children will prove costly on Election Day.

  Medicare recipients have been victimized by private insurers that run the drug benefit program, according to a review of federal audits.

  A coach whose exercises are not meant to train your body. They are aimed at training your brain.

  The marketing of the ?mommy makeover?seeks to pathologize the postpartum body, characterizing pregnancy and childbirth as maladies with disfiguring aftereffects that can be repaired with the help of scalpels and cannulae.

  The announcement of Senator Pete V. Domenici?s progressive brain disease has left unanswered questions about how the illness is affecting him.

  Gary Taubes says the best diet is high in protein and low in carbohydrates.

  The fight over child health care shows how hard it will be for Democrats to sell Republicans on universal insurance.

  The label on the schizophrenia drug Zyprexa now acknowledges its tendency to cause weight gain, high blood sugar, high cholesterol and other metabolic problems.

  The new heart stent from Medtronic Inc. has been assocated with more blood clots than a rival product has, federal regulators have concluded.

  The document, aimed not at doctors, but at national health ministers, was the W.H.O.?s first guide to planning end-of-life care.

  After Texas limited awards in medical malpractice lawsuits, doctors arrived from all over the country.

  Microsoft?s long-anticipated drive into the consumer health care market will offer free personal health records that can be managed on the Web.

  Congressional investigators and public health experts said that the federal government is failing to properly supervise a greatly expanded network of public and private laboratories handling deadly agents.