25weeks baby under 5percentile femer

[Cfxxx]

Hi
I’m due 28th Aug. My baby boy has been measuring on the smaller side up until 19weeks. He kinda caught up then. His femer (FL) was flagged at a private growth scan we booked ourselves at 24+weeks. U can see the scan where baby FL is under 5% it’s 4.8% she said she was referring me to be reviewed for scan. I can’t help but freak out. I have attached scan for most recent scan and 20week scan there has been growth between both but I also have GD, anti phospholipid syndrome which I have to take blood thinners from 8weeks pregnant. Pcos and endometriosis and have 1 7year old boy and this is rainbow baby no11 🥰

can someone have a look at my growth charts and tell me what ye think.

i have freaked myself out big time!!

Sorry you’re experiencing this worry, OP. I can’t see what I’m supposed to be comparing as both pics seem to include the same results. But what I’d say is that scan measurements are not all that accurate often, and babies seem to have growth spurts in different areas at different times in utero. I made myself miserable during pregnancy because my baby’s head circumference was measuring on the 3rd percentile for a few weeks. When she was born it was 50th percentile! She’s very clever and if anything her head is on the slightly large size now. So things really can look worrying or out of proportion at one point and then fine later on. What I found comforting then was reminding myself that 3rd percentile just meant her head was in the smallest 3%, and 3% of babies born don’t have microcephaly, so even if her head stayed very small it was unlikely statistically to mean anything terrible. Similarly maybe your son’s femurs are in the bottom 5% for length, but in itself that probably doesn’t mean a whole lot. What are you worried about specifically?

Sorry this is the other one

Thanks. The scale is there for a reason and your baby is still on it. Most likely this was just a slight underestimate by the person performing the scan — or maybe baby just isn’t going to be very tall. It’s not necessarily cause for alarm. What is it that’s worrying you about this? Your baby is growing fine — abdominal circumference is usually the one to suffer first if baby isn’t getting what it needs, and your little boy’s AC looks great. Has the hospital said a shortish femur might be meaningful in some way?

Not sure if I'm interpreting the data correctly, but I don't think you need to be too worried. Most of your baby's measurements are on the smaller side - around 30th percentile, which is totally normal - babies come in a range of sizes! Abdominal circumference is bigger, but that's very common with GD.

Obviously it's important to have the review/scan just to rule out anything concerning. But if your baby is around the 30th percentile, I think they probably just have slightly shorter legs relative to their body than the average baby!

I've attached a screenshot I found online of femur length centiles by gestational age - at 25 weeks the difference between the 5th and 10th centiles is less than 1mm, which is about as small as an ultrasound can reasonably measure.

I expect when they measure at your next scan that everything will be absolutely fine.