High-Risk Pregnancy

Water consumption before growth ultrasound

Obviously I will follow the doctors orders, but I was curious if everyone else was prepped about water before their growth ultrasound. The imaging center told me I needed to drink and retain 32 oz of water for the ultrasound. Not a huge deal, but I can't imagine that holding 32 oz of water in my bladder is going to be fun with the babe pushing down on it!

At this point do they need the water for a clear image or is it more to make sure I'm not dehydrated for amniotic levels?

Re: Water consumption before growth ultrasound

  • Probably for imaging purposes. Every place is different - at mine I had to drink 24 oz of water and hold it for both of my anatomy scans (couldn't see her spine at 20 weeks, had to check again at 24). But once I pass 30 weeks, I think, they tell you not to drink.

    The bladder being full can affect the position of the baby/uterus. Chances are they'll let you go use the bathroom half way through the scan and then they'll have a slightly different view of the baby. Better to start with a full bladder than have to wait for it to fill up.

    Mama to two sweet girls
    DD1 Feb 2010
    DD2 Sept 2011


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  • I had a growth u/s at 33 and 36 weeks and my doctor told me not to worry about the water consumption.
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  • Having a full bladder does help the tech to visualize the baby better, but I was told it was mostly so they are able visualize your cervix,  I had one scan without a full bladder and the tech stated she was unable to see my, so she had to do it trans-labia. 
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  • I'm getting u/s 3x a week with the MFM and have never once been told I need to drink extra water.  They have never had issues with getting the images either.  I guess every place is different?  Seems odd to me.
  • Yeah. I understand needing a full bladder for the earlier ones but I thought at 36 weeks I'd be beyond that! Ah well. Maybe I'll get in there and the tech will laugh at my giant belly and tell me to go pee ;)
  • In case anyone else reads this and needs the info...

     The water was so that she could check my cevix and I was able to pee once she had that measurement and finish the ultrasound with an empty bladder. Yay!

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