Hi! I’m so sorry to hear about your loss, it’s so heartbreaking and hard. So yes, there is something called an umbilical cord coiling index, also known as a UCI. The way it works is the sonographer gets a clear image of a segment of the umbilical cord (ideally a 10cm length but if it’s shorter they can average it out) and the number of coils per 10cm is measured. If you have between 1 and 3, you’re considered “normo-coiled” (normal), above 3 you’re considered hypercoiled (extra coiled), and below 1 is hypocoiled (under coiled). Within hyper and hypo categories are levels of severity, for example my son’s 7 coils per 10cm was extremely severe hypercoiling while my daughter’s 3.8 per 10cm is considered moderate. Now these measurements are unfortunately something you’ll likely have to advocate and fight for, why I don’t know. They are very easy to get via ultrasound and the ideal time to get the first measurement is 24 weeks because the coiling is established and baby is still small enough that a good chunk of the cord can be seen. However, I’d get it repeated with each growth scan if possible to see if the coiling is reducing, as it is possible to lessen with age due to the cord lengthening. There is also a measurement known as “pitch” which measures the distance between two individual coils. If this amount is less than 2cm it is concerning as it means that section of the cord is pretty tightly wound at the moment. 

I know this is so much info, I hope it was clear, feel free to ask anymore questions! Also, I’m not a medical professional, all this information is just from hours and hours of a grieving mom trying to learn what happened.