On a computer, the radiologist will watch the progress of the radioactive tracer through your body. In some cases, you might need additional imaging within 24 hours if original images aren't satisfactory. After the procedure. In most cases, you can go about your day after your scan. The small amount of radioactive tracer will lose its reactivity or pass through your urine and stool over the next day or two.
Amniotic Fluid Origin and Production. The fluid is produced by the motherâs placenta during the first trimester and the early part of the second trimester, until the babyâs kidneys are mature enough to take over the task.
Amniotic fluid is present in the amniotic sac. It is generated from maternal plasma, and passes through the fetal membranes by osmotic and hydrostatic forces. When fetal kidneys begin to function in about week 16, fetal urine also contributes to the fluid. The fluid is absorbed through the fetal tissue and skin. After the 20th-25th week of pregnancy when the keratinization of an embryo's skin occurs, the fluid is primarily absorbed by the fetal gut.