RESULTS
deaths, death
PRETERM DELIVERY, FETAL DEATH, PRETERM BIRTH
In the calculation to estimate the average cost of SPB < 34 weeks, of the 41 pregnant women in the clinical trial with a cervix length of ≤ 25 mm, all experienced spontaneous preterm delivery (SPB) before 34 weeksSPB. Of these, 10 pregnancies had an adverse outcome with fetal or neonatal death. A total of five pregnancies evolved to fetal death and two newborns evolved to neonatal death with less than 24 hours of life; therefore, these seven births did not enter the cost assessment because there was no record of the costs associated with these early deaths. Thus, a total of 34 newborns were analyzed to calculate the average cost of preterm birth. Of these, 28 were considered with adverse outcome (82.35%), having presented some type of neonatal morbidity and three of them evolved to neonatal death during the follow-up period of the study. The average cost of SPB up to 10 weeks after the probable date of delivery was estimated at R$ 15,396.61 per newborn, which would give a total of R$ 446,501.69 associated with non-screening, that is, the cost of 29 SPBs < 34 weeks that were not avoided ( 
