Popular birth control pills Yaz and Yasmin linked to increased blood clot risk

Yaz and Yasmin were once marketed as "wonder drugs," used by millions of women across the country. But these two popular birth control pills may have some very dangerous side effects. 

New research shows that the pills are linked with a higher risk of blood clots. The FDA is holding a hearing Thursday to discuss these health concerns.

CNN senior medical correspondent Elizabeth Cohen previews the hearing with Carol Costello and Alina Cho.