There exist no differences between a natural pregnancy and a pregnancy that has been achieved using reproductive technologies such as IVF. After the embryo transfer, fetal development will be the exactly the same.
Neither the risk of malformations nor the risk of miscarriage increase when using a fertility treatment. Some studies have discovered a slightly higher risk of preterm birth or low birth weight. Anyway, these complications do not seem to be directly linked to the use of fertility treatments, but with the cause of infertility: women aged 40 or older, uterine anomalies and other pathologies… This type of pregnancies must be monitored very closely.