depending on what company your ordered yours from you may get a cd that lets you know what to look for. definelty look low... for it
the heart beat will literally sound like a horse galloping.. no joke.
another tip... take it with you to your next appt and let the dr or nurse help you find it.
i used it with my last pregnancy and with this one. because i am having twins i don't every know if i am finding both heart beats or the same one twice.