If you're not familiar with pre-natal yoga, it is a type of yoga that is specific to pregnant women, helping them continue their yoga practice throughout their pregnancy. You can learn more about pre-natal yoga and how to teach yoga to mothers who have recently given birth by visiting websites like Yoga Journal and Yoga International. It's always helpful to do a little research before your interview. Take some time to educate yourself, whether it's watching youtube videos or attending yoga classes!