USA Today is reporting a three-year RAND Corp. study showing that virginity pledges do deter some teens from having sex. Of 1,517 adolescents ages 12 to 17 in 2001 when the research began, teenagers who vowed to remain virgins until they were married were less likely to be sexually active than others who didn’t make a pledge.

About one-quarter of the adolescents surveyed (23.8%) made a promise to wait until marriage to have sex; 34% had broken it by 2004, compared with 42% of those who didn’t make the pledge and had sex during that time.

Here are my takes on some of today’s health headlines.

If Dad is not involved in child care, can we blame the mom?