 2. RATIONALE: Fetal BPP and non-stress tests NST are useful tools in the assessment of fetal well-being in term fetuses. While for NST it has been established that the criteria for reassuring well-being are less strict in premature fetuses below 32 weeks gestation, the pattern of BPP scoring according to preterm gestational age has not been fully investigated. The investigators consider that in premature fetuses, a reassuring BPP scoring does not need to be as strict as that used in term fetuses. 