Do they suspect intrauterine growth restriction? What was your Papp-a at the combined test? If it was under 0.5 nmol that is a risk for IUGR, preeclampsia, stillbirth and others, and you should have been given baby aspirin from 16 weeks.
if you’re not aware call them to check.
i had low Papp-a, but was aware of the risks, took aspirin, baby was average until 28 weeks, then growth slowed and stopped at 36, but w isn’t find out until week 40 (38 week scan showed growth but was wrong), I was induced then, baby born at 2nd percentile.
IUGR means poor placental function and it can be a risk as and if it deteriorates. Btw they tested my placental flow at every scan and it was good, placenta also looked good when birthed, but though flow was good, it had an impaired function nonetheless.
it could be you just have small babies, if you can rule out the Papp-a concern, you can have more confidence that’s the case.
the aspirin - at this stage is too late to start taking it, but you can ask if clexane (blood thinner injection)can help.
2nd pregnancy for me now, considering Papp-a and previous pregnancy history, I’ll be getting clexane from 28 weeks. My baby measured 50% on the 20 week scans, so they have concerns for me for after 28.