I get my first ultrasound to find out the sex when I'm 16 weeks. I'm paying for this special one. I'm 15 weeks 3 days and i thought I was going crazy when a week ago I heard 2 heart beats (strong and healthy) through my doppler. My mom and sister finally heard both last night too. My question is for moms who had twins or expecting twins, where did you hear their heart beats. Mine is left side close to the middle and far right just before my vain