Anatomic_Structure_Has_Location Amniotic Fluid Amniotic Fluid C0002638 Aqua Amnii FLUID, AMNIOTIC Human Amniotic Fluid Amniotic_Fluid The fluid within the amniotic cavity which surrounds and protects the developing embryo. (NCI) Amniotic fluid mCode Waters (Amniotic Fluid) UBERON:0000173 C13188 Amniotic fluid is a bodily fluid consisting of watery liquid surrounding and cushioning a growing fetus within the amnion. It allows the fetus to move freely without the walls of the uterus being too tight against its body. Buoyancy is also provided. The composition of the fluid changes over the course of gestation. Initially, amniotic fluid is similar to maternal plasma, mainly water with electrolytes. As the fetus develops, proteins, carbohydrates, lipids, phospholipids originating from the lungs, fetal cells, and urea are deposited in the fluid. The fluid within the amniotic cavity which surrounds and protects the developing embryo. It is initially produced by the amnion and then later by the lungs and kidneys. The amount at term normally varies from 500 to 2000 ml. CDISC UBERON Liquor Amnii Body Substance Amniotic Fluid AMNIOTIC FLUID FDA GDC amniotic fluid Amniotic Fluid SPL Tissue Form Product Type Terminology Embryonic Fluid GDC Terminology Specimen Anatomic Site GDC Value Terminology mCode Terminology mCode Genomic Specimen Type Value Set UBERON Terminology Amniotic Sac FDA Structured Product Labeling Terminology Clinical Data Interchange Standards Consortium Terminology CDISC SDTM Terminology Targeted Anatomic Site CDISC SDTM Anatomical Location Terminology CDISC SEND Terminology CDISC SEND Biospecimens Terminology CDISC SDTM Specimen Type Terminology