Fetal heart rates?

hmbb2300 · September 2014

I'm 7 weeks today, and we found out last week (at 6wk, 3days) that we're having twins! Both babies had heart rates of 121, which my OB seemed happy with, but I'm guilty of googling things, and have read of vanishing twin syndrome. Of course, now I'm terrified. It's my first pregnancy, after 6 months of TTC with an REI. We go for weekly ultrasounds to monitor growth, and I'm just wondering if any of you have info as to what the heart rates should be each week? I'll be 7w3d at next scan, and just wondering what number to hope for?

minirella · September 2014

As the embryo develops, the heart rate will increase. Sometimes you don't even hear a heartbeat at 6 weeks and it is common for them to be lower just starting out.

RayRay007 · September 2014

At that age I think that's a great HR! I think HR peaks around 10-12 weeks and then settles down a bit, IIRC.

absolutelymaybe · September 2014

Those are perfectly normal heart rates. They will likely fluctuate during your entire pregnancy. Do not stress about a specific number.

karah4816 · September 2014

At 7 weeks those are great heart rates. Also, something to keep in mind is that once a heart beat is present the risk of vanishing twin goes way down. And it continues to fall every week

PinkinProvence · September 2014

There's a huge range of heart rates and it changes as the pregnancy progresses.

hmbb2300 · September 2014

Thank you for the feedback. This is all so new to me, and I'm in the shock/thrilled/disbelief/excited/no-words-to-describe-it stage right now! Trying hard to not think about all the things that could go wrong, and banning myself from Google for a while

amandam1982 · September 2014

When I found out I was having twins, both of their heart rates were in the lower 100s. Now I'm 35 weeks pregnant and they both are fine and have heart rates in the 130s. If the doctor is happy with your results, try not to worry too much.