I'm 34 weeks pregnant and trying to understand some terms from my latest scan results. Can you explain what these foetal growth parameters mean? Like, what do 'bpd 86 mm', 'hc 312 mm', 'fl 69 mm', and 'ac 304 mm' indicate about my baby's growth? And, it says the estimated foetal weight is 2.5 kg, which sounds reassuring, but is that an average weight for this stage? Also, my amniotic fluid is normal with an AFI of 12 and the placenta is posterior with grade 2 maturity in the upper segment. They're saying there are no obvious anomalies now, and something about the Doppler study of the umbilical artery with terms like 'psv 36 cms' and 'edv 15 cms', and other readings like 'pi 0.84', 'sd 2.3', and 'diastolic filling good'. What do these mean for my baby? It also mentions the uterine artery on the right, and the foetal mca Doppler trace is within normal limits. I'm a bit confused about what all these mean, especially when they mention things like a single live foetus with a vertical lie and low head position. It sounds like everything is okay, but no IUGR and no cord around the babys neck are mentioned too. Could you help clarify all this for me?