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retroverted uterus, measuring 7+3 wks at '12' wk scan?

(13 Posts)
joaninha103 Sun 09-Feb-14 16:26:00

I have a retroverted (backwards facing) uterus and went for my 12 week scan (according to LMP date) only for sonographer to say I'm only measuring 7wks +3 days. How likely is it to be that far out? Not 100% sure of dates, but pretty sure I haven't miscalculated by that much! I read somewhere that having a ret. uterus makes it more difficult to see anything on an abdominal scan as you're looking at it 'sideways'. Anyone else had similar?

Julietee Sun 09-Feb-14 18:12:02

I also have a retroverted uterus (only found out reading my scan notes!). I know that they tip forward at some point when the weight of the pregnancy get's heavy enough.
Sorry, I have no idea about your possibly date miscalculation issue.

fridayfreedom Sun 09-Feb-14 18:14:16

I have one two and measured small for dates till later in my pregnancy. She was 7lb 3oz.

willitbe Sun 09-Feb-14 18:25:36

A retroverted uterus usually measures upto 2 weeks behind, but once the uterus moves above the pelvic brim at 12 weeks, it rights itself and the measuring behind no longer happens.

My dd at 7w3d was measuring less than 5weeks, but by 12 weeks was measuring ahead by 5 days (which tied in with early ovulation).

I would say that if you have a retroverted uterus, then add 2 weeks onto the measured date which would make you around 9 and a half weeks, would this tie in with when you got a positive pregnancy test? I think that it would be a good idea to have another scan in 2 or 3 weeks and see if you have caught up with being closer to dates.

Could you have ovulated late (do you normally have long cycles?)?

smudgedhorizon Sun 09-Feb-14 19:50:26

I have a retroverted uterus, I've never measured behind and it actually corrects itself once you hit approx. 13 weeks and pop out from the pelvis. It won't make the baby measure any smaller, it can just make the baby harder to find in the early weeks using an abdominal ultrasound, so they will often use transvaginal, but it won't make a difference to the actual measurements and dating of the baby xxx

willitbe Sun 09-Feb-14 20:12:28

Smudgedhorizon - sorry to disagree but it can make measurements incorrect. Look up misdiagnosed miscarriages website for the links to published data and many many stories. I have also experienced it personally on all my pregnancies.

willitbe Sun 09-Feb-14 20:15:06

Sorry pressed pist too soon. At actual dating scans after uterus was above pelvic brim my pregnancies have all measured correctly for dates, but all early scans measured significantly behind dates, specifically due to retroverted uterus.

MummytoMog Sun 09-Feb-14 23:32:19

I have a retroversion as well - never measured behind and had several early scans in first two pregnancies and one this morning, which actually put me forward. Not to say your scan couldn't be wrong, but are you sure of your dates? What was the heart rate like? Could they still see a yolk sac?

BakingBunty Mon 10-Feb-14 09:11:11

I too have a retroverted uterus. Sorry to say that I've only measured behind on a pregnancy that didn't work out. I've measured bang on or slightly ahead at 6w, 8w and 12w for pregnancy with DS and this one (currently 13w 4d).
I really hope it works out for you though - it does seem like some people get funny measurements.

RaRa1988 Mon 10-Feb-14 13:55:13

I have a retroverted uterus (severely, apparently, though by about 13 weeks it was easy to scan my trans-abdominally even with an empty bladder. She measured slightly ahead of dates even at early scans (6+5 and 7+1), so I have no experience of what you're going through, but baby's position can make it more difficult to measure him/her. At my 12-week scan, for example, she was lying transverse and the sonographer couldn't get proper CRL measurements so had me doing star jumps around the room to make her move! grin I wouldn't be surprised if it was more difficult to measure your baby if your womb is still retroverted - as far as I know, most will have moved to more-or-less upright by 12 weeks. Did they not offer a transvaginal scan? And what did the sonographer think? Heartbeat detectable?

joaninha103 Mon 10-Feb-14 19:01:33

Thanks for all the replies. just reading my original post and realised I'd written I'm measuring 7+3, and I actually meant I'm measuring 9+3 I recon I could be up to 1 week out going by dates and as sonographer said there's a strong heartbeat, but still yolk sac, I'm guessing I'm about 10-11wks. Can't wait til 'proper' 12wk scan... although I'll probably be about 13wks by then and maybe too late for NT/Downs tests... confused

Roseandmabel Mon 10-Feb-14 21:06:25

My experience has been that it has been difficult to see the baby during scans (I needed internal ones). However mu dates have been spot on at every stage. The pregnancy that didn't turn out well I had measured behind.

I did know exactly when I ovulated which made it easier to calculate my dates this time. Measuring only a week behind is less concerning than three weeks.

Keeping my fingers crossed op.

RaRa1988 Mon 10-Feb-14 21:19:12

Hopefully only being a week behind isn't too much to worry about OP - certainly better than what we thought at first from your OP! And a strong heart beat has got to be a good sign smile. Fingers crossed.

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