Ecuaciones para estimar la talla fetal al momento de la muerte en población mexicana.

Abstract

Fetal size estimation is essential for establishing a biological profile of prenatal subjects. In this study, a quadratic regression model is presented using long bone lengths: humeri, radii, ulnas, femurs, tibias, and fibulas from both sides. A sample size of 97 fetuses between 10 and 38 weeks of morphologic age was used to perform the estimations. The subjects had soft tissue, were complete and conserved in buffered formalin. The diaphyseal lengths were obtained through x-ray imagery. The control sample was composed of 47 disjointed femurs from fetuses between 10 and 20 weeks of gestation and were measured with a digital calibrator. All specimens were provided by the Collection of Human Embryos and Fetuses in the Faculty of Medicine at the National Autonomous University of Mexico. The study found that the humerus, femur and tibia can be used to obtain precise estimations of fetal length or size measured in mm.