What physical changes can result from oligohydramnios during fetal development?

Oligohydramnios, a deficiency of amniotic fluid, removes the protective buffer that shields the fetus from the pressure of the uterine wall. This extrinsic pressure can lead to several physical changes and developmental deformities:

• Limb and Joint Deformities: The fetus may develop clubfoot, clubbed hands, or arthrogryposes, which are characterized by contracted joints and clawed fingers.12
• Facial and Skeletal Distortions: Pressure can cause wryneck as well as a flattening of the nose and ears.12
• Skin and Growth Changes: The infant's skin may appear dry and thickened, and the condition is often associated with overall growth retardation.12
• Organ Development: Oligohydramnios is frequently linked to the underdevelopment of the lungs and gut, as well as defective development of the kidneys.12

If the condition occurs early in pregnancy, it can cause firm adhesions between the membranes and the embryo, leading to significant fetal distortion.1