No changes were found in ultrasound estimated fetal weight (EFW) centile between 20-22 and 32–34 weeks in in-vitro fertilisation (IVF) pregnancies compared to spontaneous conception (SC). Significant (P = 0.02) fastest fetal growth (mean increase in centile of 5 between 2nd to 3rd trimester) was observed in the frozen embryo transfer (FET) subgroup compared to SC, and IVF pregnancies resulting from fresh blastocyst transfer (FBT) and oocyte donation (OD). Low placentation was significantly (P < 0.001) more common in the IVF group than in the SC group but was not associated with a change in growth pattern suggesting that fetal growth in-utero is independent of placental location but may be influenced by embryo freezing