<prompt> Obesity in pregnancy causes all of the following complication except:Abnormal uterine actionFetal neural tube defectPrecipitate laborVenous thrombosis  <response>: Ans. is c, i.e. Precipitate labourRef. Dutta Obs. 7e, p 344; Williams Obs. 23e, p 951, 952Obesity in PregnancyBody weight 90 kg or BMI 30kgm2 is considered obese.BMI 20-24 is normal 25kgm2 OverweightObesity is associated with increased incidence of:During pregnancy:Dyspnoea on exertionHypertension essential and PIHDiabetesAnomalies is increasedDifficulty in diagnosis of presentation and in hearing the FHS.During labour:Abnormal uterine contractionsProlonged labour and not precipitate labourShoulder dystociaOperative interferenceanesthetic complications.In puerperium:Venous thrombosisLactation failure.Note: Obese pregnant females should be considered under High Risk groupRisk to the fetus in case of maternal obesity: incidence of first trimester abortions Incidence of fetal anomalies - especially neural tubal defectsMacrosomia which in turn leads to chances of shoulder dystocia, birth injury and incidence of low apgarScores and perinatal death Ref High risk pregnancy Manju puri SS. Trivedi, p 493Still birth rateIn adult life - such fetuses have increased chances of obesity and heart diseases. 