<prompt> Answer this question truthfullyWhat is oligohydramnios, and what are some conditions that may be associated with it during pregnancy?  <response>: <reason> Oligohydramnios is a medical condition that can occur during pregnancy when there is too little amniotic fluid surrounding the fetus. This can be caused by a variety of factors, including problems with fetal kidneys or urinary tract, placental insufficiency, or ruptured membranes. Some specific conditions that may be associated with oligohydramnios include bilateral renal agenesis a congenital defect in which both kidneys fail to develop, and posterior urethral valves a blockage in the urethra that prevents the fetus from excreting urine properly. These conditions can have serious implications for fetal development and may require medical intervention to manage. 