Percentile accuracy

I’m had my 31 week appointment on Monday and measuring the 89th percentile, i think they measure more so to make sure it’s a steady trajectory of growth more than the actual size don’t worry too much, Ive had so many friends saying they’re measuring huge and have 6lb babies, I was told my first baby was going to be huge too (like 9lb+) and she was a healthy 8lb 4oz xx

Mine is too! And my previous baby weighed 10lb when she was born however my bump had always measured on track with her so Ive been super worried this time but my midwife has basically said they won’t do anything as she’s not concerned so I’m just hoping the bump measurements don’t mean anything. I was measuring 33 weeks at my 31 weeks appointment and had my 34 week appointment last week where I measured 36weeks 😬

So I’m measuring at 97% from a scan🥴 but my bump is on point. Note to self, don’t make friends with the obstetrician and have her book in extra scans for fun to see the baby. I’m now being closely monitored 🙃

Just note, there is a 60% INACCURACY! So scans are only 40% correct 🤦🏼‍♀️ it depends on the babies location etc, so take it all with a pinch of salt and don’t be scare mongered into c-sections or inductions. Your body, your choice!

Fundal height measurement is to see if you have any drastic changes. If for example you're tracking 50% centile for ages and then suddenly shoot up to 75th then that might be a sign of something going on like extra amniotic fluid which would need to be investigated. Similarly, if you rapidly drop bump centiles it can be a sign of static growth which would also need investigation. It's not a perfect science and definitely has it's flaws

I wouldn’t worry about it. Fundal height measurements in the UK seem to be wildly inaccurate because they are supposed to be done consistently by the same provider and earlier than 28 weeks. I had them with my first in the US and it started from 14 weeks till the end and with the same provider so we could track what was normal for my pregnancy. At my 28 week midwife appointment I was apparently measuring “way off the charts” but a growth scan showed baby was 70th percentile.

Agree with what others have said that it's supposedly to check for 'consistency of growth'. The centile doesn't match to baby weight centile at all because every chart is custom to your individual weight and height. So my 90th centile would be different to your 90th centile. They also absolutely have to be done by the same midwife to have even a shred of credibility.

Both pregnancies I came out on completely different centile when I had a different midwife do it. I refused growth scans both times and when my normal midwife measured the following appointment, surprise surprise, it was back on track.

My LG was measuring 96% at 32 weeks and we have another growth scan next week at 36 weeks to see how she’s is growing. I was told not to worry but it is easier said than done. X

My bump has been measuring 4 weeks ahead for the past 6 weeks! About a centimetre above the 100th percentile on the graph 🙈 I’ve had 2 growth scans and the baby on those is measuring on the 50th percentile. So don’t worry about your bump measurements xx