<prompt> Fetal kidneys start producing urine by:3 months4 months5 months6 months  <response>: Ans. is a, i.e. 3 monthsRef. Williams Obs. 24e, p 142Fetal kidneys start producing urine at 12 weeks 3 months.Initial rate of production of urine 7-14 mlday.At term it is 27 mlhr or 650 mlday. 