<prompt> Weight gain in pregnancy is related to all except :EthnicitySmokingSocioeconomic statusPreconceptional weight  <response>: Total weight gain in singleton pregnancy averages 11kg. It is distributed to 1 kg in first trimester and 5 kg each in second and third trimester. Total weight gain at term is distributed as reproductive weight gain 6 kg fetus,placenta,liquor,uterus,breasts,accumulation of fat and protein and net maternal weight gain of 6 kg increase in blood volume and extracellular fluid. Ideally weight gain in pregnancy depend on pre-pregnant BMI20-26 is 11-16kg, 29 is 7kg, 19 is 18kg Reference: Dutta Textbook of Obstetrics 7th edition page 50 