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heartbeats and ultrasound question

Forum: Moms and Expectant Moms of Multiples


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May 27th, 2011, 06:52 AM
Join Date: Mar 2011
Posts: 38
so i'm 17 weeks tomorrow; a few weeks ago during my u/s the tech says identical boys, but on the one picture the dr said, dr suggested boy/girl. their heartbeats are almost the same right around 143-145. when i check at home with the doppler it's the same.

i think the u/s tech got a bad picture maybe...but just wondering if any of you that have b/g twins have different heart rates or should i think they are the same sex since hr is same...

my next appt in thursday, but it's impossible not to wonder during the meantime.
I'm Kelly, Merryn's Mom! With 2 on the way!!
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May 27th, 2011, 11:16 AM
Join Date: May 2011
Posts: 17
b/g or not there should always be a variation with the heartbeats. You can't be sure that you aren't picking up the same twin if their heartbeats are not about 10 beats apart. (I've spent quite a bit of time in hspt, non stress tests, etc so I'm getting to know the drill A good heart rate is between 130 and 160 and with twins should be about 10 beats difference
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May 27th, 2011, 12:37 PM
Celry's Avatar Platinum Supermommy
Join Date: Nov 2007
Location: WI
Posts: 12,946
In the beginning, my kiddos had very different heart rates. When we were doing NSTs toward the end, they were always very close. It was hard to make sure we had both kids and not one of them twice.

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Dec 26 '08, BFP after 21 months thanks to acupuncture
Jan 14 '09, first u/s one strong heart beat
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May 27th, 2011, 01:18 PM
tgc219's Avatar Super Mommy
Join Date: Mar 2010
Posts: 885
My b/g twins' heartrates varried. Most of the time they were different, but once or twice they were actually the same . I don't think heartrates are a good way to determine gender though. Might be an old wives tale?

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May 27th, 2011, 03:19 PM
tundrababy's Avatar Mega Super Twin Mommy
Join Date: Jun 2008
Location: Portland, OR
Posts: 2,923
I have b/b frats and generally they were always within a couple beats of each other, so much so that we did u/s at every appt instead of doppler up until 24+ wks until we could physically tell which baby was where.
I guess I would be more interested to know, if the tech say ID boys, assuming she meant she saw only one placenta and now your OB says b/g, is he thinking the one placenta is fused or another placenta was found?? In any event, sounds like things are going good, KUP!!
Jen, mom to Danika 6, and twins Owen & Rhys 3 (how did that happen!?!)

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May 27th, 2011, 05:44 PM
Platinum Supermommy
Join Date: Jan 2006
Location: Ontario
Posts: 10,865
My b/g are sometimes the same, and sometimes different. It's really not accurate to go by heartbeats.
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May 27th, 2011, 06:48 PM
1+twins's Avatar Platinum Supermommy
Join Date: Sep 2005
Location: USA
Posts: 5,751
Mine were always 1-3 beats different. They tried and tried with the NSTs but they always were that way so they determined by doing an internal U/S that that was just how they were. So I don't think it matters really. I think it can vary from pregnancy to pregnancy. Sorry, didn't help much did I?

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May 27th, 2011, 07:08 PM
Austinsmama2007's Avatar Mega Super Mommy
Join Date: Oct 2010
Location: Oregon
Posts: 1,487
So far my b/g twins have had a little different hb's. Not by much though. The past few NST's they have been fairly close though.

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May 27th, 2011, 08:47 PM
Mega Super Mommy
Join Date: Jun 2010
Posts: 2,373
My identical girls' heart rates were always within a few beats from each other. The u/s tech would always have another tech come in to verify and they checked their heart rates at least 3-4 times. My dr. never used a doppler because they were so close.
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May 29th, 2011, 02:36 PM
Super Mommy
Join Date: Oct 2010
Posts: 555
My identical boys were always different.
Mom to:
Quinn - 10
Gavyn & Kendric - 8
Joseph - 18 months
Step-mom to:
Kiersten - 8
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June 15th, 2011, 09:48 PM
Mega Super Mommy
Join Date: Jun 2011
Posts: 1,191
My identical boys would sometimes have identical heartbeats and other times be off by about 10.
If you want to follow our son Laud's journey to beating childhood leukemia, check out his CaringBridge page. http://www.caringbridge.org/visit/laudedwards He was diagnosed on Dec. 11, 2011

Mommy Pam to 8 other blessings ages 16 to newborn! 5 boys and 3 girls.
For the multiples forum: I have identical twin boys who are 3.
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