Evaluación fetal anteparto

In humans as well as in animals, the fetal heart rate pattern, activity level, and degree of fetal muscle tone are sensitive to hypoxemia and acidemia. Various techniques such as cardiotocography, real-time ultrasonography, and maternal perception help to identify a fetus that is sub optimally oxygenated, with a significant degree of placental or acidemia dysfunction. These techniques allow us to intervene and prevent a progressive acidosis from ending in stillbirth. The "Non- Stress Test" (NST) is one of the fetal well-being evaluation tests used during the prenatal period. • This test uses the fetal heart rate (FHR), at which its baseline, accelerations, combined (15 beats in 15 seconds), associated with fetal movements or auditory stimulation, as well as decelerations associated with uterine contractions are evaluated. . Fetal biophysical profile-consists of four real-time ultrasonographic observations where the following are evaluated: • Fetal respiratory movements- one movement or more than 30 seconds in a 30-minute period • Fetal movements- three or more body or limb movements in a 30-minute period • Fetal tone- one or more episodes of extension with return to flexion of a limb or opening and closing of a hand • Determination of amniotic fluid volume. <a id="