Medical Discovery News, July 19, 2008 Saturday's edition of Medical Discovery News, by UTMB professors Norbert Herzog and David Niesel, was about birth control pills that reduce a woman's periods from 13 to four a year.  While the pills have advantages such as reduced cramping and have lower doses of estrogen and progestin, the professors also noted that, like other hormone-based birth control, these pills also increase the risk of stroke and blood clots and that scientists and doctors do not yet know the long-term ramifications of this birth control method. Medical Discovery News airs at 10 a.m. on KUHF-FM in Houston. The program also airs on numerous radio stations across the country and in Mexico.