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Height of fundus, how accurate is this?

(5 Posts)
mrsbigw Thu 11-Nov-10 12:34:28

Just got back from my 2nd MW appt, according to dates of LMP I should be 11 weeks today.
However I asked my lovely MW if she would check fundus height as I have been very aware of how high my uterus feels already compared to previous babies & I am wondering if my dates are wrong (scan booked for 2 wks time & I am impatient!) more so as the nausea feelings have subsided slightly & I have been getting heartburn this week which I don't usually get so soon.
Anyway she said height of fundus measures at 14 wks & she also managed to find a heartbeat which was a lovely bonus!
This is my 4th baby so I am aware that people usually show earlier but I have always been spot on with my others & have never had a bump so soon.
Any thoughts or superior knowledge re fundus height welcome thanks!

japhrimel Thu 11-Nov-10 13:37:24

Afaik the margin of error is usually +/- 2cm, but it's very dependent on the person measuring and circumstances.

I assume you're not having the nuchal test? If you were planning on having this, I'd ask asap for an earlier scan.

mrsbigw Thu 11-Nov-10 13:43:04

Thanks Japhrimel, no I'm not having the nuchal, I'm just curious as to how far along babs actually is. Pg really is such a waiting game & I am a bit crap at waiting patiently!

Tidey Thu 11-Nov-10 13:46:41

I'm in no way an expert, but it wasn't very reliable in my second pregnancy. I measured quite a lot bigger than I 'should' have, and was told DD would probably be 10lb. She was nearly two weeks late and still only weighed 8lb 1.

craftynclothy Thu 11-Nov-10 13:49:15

I thought the fundal height thing (cm=weeks) only applied from 20 weeks. Even then it's not particularly accurate as it depends on the baby's position and a variety of other factors.

FWIW my independent midwife never used it.

I've also had very different shapes at that stage. With dd1 I was in maternity clothes at 9 weeks and many people asked if I was expecting twins shock, with dd2 she was so low in my pelvis that the sonographer struggled to get her measurements at the 20 week scan.

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