Health Sciences

PHILADELPHIA –- People who identify as African-American may be as little as 1 percent West African or as much as 99 percent, just one finding of a large-scale, genome-wide study of African and African-American ancestry released today.

PHILADELPHIA –- Reproductive researchers from the University of Pennsylvania and The Children’s Hospital of Philadelphia have succeeded in isolating and transplanting pure populations of the immature cells that enable male reproduction in two species—human spermatogonia and mouse gonocytes.

PHILADELPHIA –- Examining data obtained from a University of Pennsylvania and Vanderbilt University psychology study, researchers at these universities and Northwestern University have reported the first placebo-controlled evidence that antidepressant medications—particularly selective serotonin reuptake inhibitors, or SSRIs—can substantially change patients’

PHILADELPHIA –- A research collaboration led by biologists and neuroscientists at the University of Pennsylvania has found a molecular pathway in the brain that is the cause of cognitive impairment due to sleep deprivation.

PHILADELPHIA –- The University of Pennsylvania has launched a Web site to inform the public of scientific research funding it has received from the American Recovery and Reinvestment Act, the stimulus measure that has delivered the largest increase in basic funding in the history of federally funded scient

WHAT:

PHILADELPHIA – A team of researchers at the University of Pennsylvania and the Università Bocconi in Milan have released a study that challenges one of the most established and accepted standards in the social sciences: Human fertility levels tend to decline as countries advance towards high levels of social and economic development.