my sister is having congenital heart valve disease. Doctors said that it does not effect any thing, but u have to show certificate for any surgery. she got check up at her small age, Doctors given medication for 5-6 months. Now she is 26 years old. recently she got check up, but still the heart beat sound heard as murmur. my parents are fear about marriage, and any problems during pregnency. Is it having problem during pregnency. Breast size also not as per her age.pls suggest me to overcome these problems. No doctor suggest for surgery. i think it minor. still is it cause any problems. pls help me.