This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Weight gain in pregnancy is related to all except: \nSelect and explain. \nA. Ethnicity, B. Smoking, C. Socio economic status, D. Pre conceptional weight', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Average maternal weight gain during pregnancy is 11-12 kg\nFactors which affect maternal weight gain during pregnancy are:\n\nPre pregnancy weight: If the pre pregnancy weight is more than normal (obese), there is a tendency to gain excessive weight during pregnancy.\nRace and ethnicity: American women tend to put on more weight during pregnancy as compared to Asians and Africans.\nSocio economic status: Women from higher socio economic group have more weight gain as compared to women from lower socio economic group. This is because malnutrition prevents optimum weight gain.\nAssociated conditions like women with gestational/over diabetes mellitus, twins and polyhydramnios have higher weight gain during pregnancy\nParity: Multigravida females tend to gain less weigh than primigravida\n\nSmoking does not affect maternal weight gain during pregnancy, Smoking affects fetal weight gain and is one of the causes of IUGR.\n“Studies have, indicated a lack of relationship between smoking and maternal weight gain while demonstrating a direct relationship between smoking and fetal grown rate.”\xa0\nRemember:\nRapid weight gain, i.e. more than 0.5 kg a week\xa0or 2 kg per month\xa0is an early manifestation of preeclampsia.\n\nStationary or falling weight suggests IUGR or IUD.\nIn pregnancy – the amount of water retained is 6.5 L at term', 'role': 'assistant'}]