I know this question seems dumb but please humor me. I'm 22 weeks and my sister just announced she's 8w2d but in the last 8 months she has had 2 miscarriages, one at 8w1d and one at 8w3d. I have a fetal heart monitor but wasn't able to find the heartbeat on myself until 11w, but I have a lot more fat than she does. She is in town for Christmas and is thinking about trying it but doesn't want to freak herself out if she can't find it. I'm 5'5 and 155 pre-pregnancy and she's 5'8 and 115 and super fit. I would think she would be able to find it earlier since there's a lot less fat to have to get through, but I don't want to send her into a tailspin of worry if we can't find it.