Alonso Ortiz, T.Armada Maresca, María IsabelAlonso Chacón, PabloZuluaga Arias, María del Pilar2023-06-202023-06-202003-020211-3465https://hdl.handle.net/20.500.14352/51441Objective: To compare fetal growth averaged rythm of single pregnancies with those of pregnancies of twins, according to sex and gestational duration time; and comparing twin male and female newborns. Material and method: Comparisons are taken from the averaged weekly growth of 1.056 male twins and 1.084 twin female newborns, against 19.982 single males and 18.636 single female newborns, respectively. These comparisons are also taken from the 1.056 male twins and the 1.084 female twins. Results: The significant differences between single newborns and twins according to weight averaged growth, seize and cranium perimeter start from the thirty-fourth gestational week. Once male and female twins are compared, significant differences appear in weight and in averaged seize since the thirty-fourth gestational week. However, when cranium perimeters are compared, significant differences don't exist. Conclusion: Each country must have their own fetal growth curves for clasifying newborns accurately.journal articlemetadata only access51-76Comparative fetal growth between single and twin newbornsPerinatal anthropometryTwin newborn. EMTREE medical terms: accuracyAnthropometryAticleBody sizeComparative studyControlled studyFemaleFetusFetus growthFetus weightGestational ageHead circumferenceHumanMaleNewbornSex differenceTwin pregnancy.Estadística aplicadaBiología24 Ciencias de la Vida