I'm eight weeks pregnant. I was wondering when you could hear the baby's heartbeat?

Fetal Heart Beat. Typically the heart beat can not be heard with even a doppler until the 9-10th week of pregnancy at the very earliest (sometimes not until the 12-14th weeks of pregnancy).
10-12 weeks. Depending on your height and weight....And baby cooperation....You can pick up a fetal heart beat with a doptone around 10-12 weeks.