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Have any of you heard about the fetal heart rate & sex of the baby theory? My last two babies had heart rates in the 140's & were both boys. On my second prenatal (the 11th), the heart rate was in the 160's. That got me wondering about if this baby could be a girl???
 

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Well, this baby has had the hb of 155-160 (on three visits) and 144 at the u/s.<br><br>
He is a boy. <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/shrug.gif" style="border:0px solid;" title="shrug">
 

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DDC crashing, but my baby girl has had heartrates that go from 135 to 170<br><br>
All depending on how busy she is while they're monitoring it.
 

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my LO started out at 168 at 8w, 150's at 12 & 16w, and was 144 at my 21w u/s when we found out she was a girl.
 

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This baby's HR started at 167 at 8week u/s, and was 146 at 20week u/s. It's a girl.<br>
I don't remember what my son's was.
 

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150 and 155 for our boy.
 

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My 1st DD had heart rates in the 160-170s. Second DD had heart rates in the 140s. My DS was in the 150s. This baby has been anywhere from 150-170s.
 

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People claim it's an old wifes tale, but it's been true for me so far as well. DD was always in the 160s, this one is a boy and he's never been over 145. So, IDK, maybe.
 

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My 3 boys were in the 130-140s. JingleBelle's heart rate is in the 150-160 range.<br><br>
Amy
 

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This little guy had a heart rate of 167, but is in the upper 150's now. Everyone was sure I was having a girl!
 

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I think it's difficult to say. This baby (a boy) had a HB of 188 at the 9 week u/s, and then was in the 160's just before the 20 week u/s... here's the funny though: at the prenatal visit, just 2 hours before the u/s, the HB was 166, and then at the u/s it was 156. So yeah, maybe activity affects it. We were starting to think we had a girl on our hands, but the evidence was clearly otherwise <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/orngbiggrin.gif" style="border:0px solid;" title="orange big grin">
 

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My first reading was 170, then 150's at the ultrasound. He's all boy.
 

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It seems it is only more true in labour because girl's have a slightly faster heartbeats than boys... (even as adults)<br><br>
but in Utero they can be all over... my first two were in the 130's most of the time (boys)... but ds#3 was in the 160's when I listened in...<br><br>
This babe is in the 160-170's.... we'll know what s/he is at birth, but because of ds#3 I am not making any assumptions <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/wink1.gif" style="border:0px solid;" title="wink1">
 

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we've been averaging in the 150's and it's a boy
 

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Discussion Starter #17
It is fun to see how everyone varied so much. I know it is an old wives tale, but I've never had a FHR this high<img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/winky.gif" style="border:0px solid;" title="Wink">
 

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Grace: 150-160's<br><br>
Eve: 140-150's<br><br>
Duncan: 130-140's<br><br>
Grayson: 140-150's
 
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