Columbus The more stress women are under while trying to conceive a child the harder it is to get pregnant.
Courtney Denning-Johnson Lynch, director of reproductive epidemiology at Ohio State University's Columbus Wexner Medical Center in Columbus, and colleagues found women with high levels of alpha-amylase -- a biomarker of stress in saliva -- are 29 percent less likely to get pregnant each month and are more than twice as likely to meet the clinical definition of infertility, compared to women with low levels of this enzyme.