Published: 2021-04-23

Effect of body mass index on maternal outcome in pregnancy

Somya Jindal, Rachna Chaudhary, Shakun Singh, Vandana Dhama


Background: Maternal body mass index during pregnancy is one of the important parameter which gives us the clue regarding maternal complications. The objectives of this study were to study distribution of antenatal patients in underweight, normal, overweight (and obese) categories according to booking BMI, to examine the association of BMI with obstetric outcomes in singleton pregnancies.

Methods: This prospective Study was conducted over a period of 1 year from July 2019 to June 2020 on antenatal women attending OPD in the Department of Obstetrics and Gynecology in LLRM Medical College. The enrolled patients were divided into three equal groups (n=50) according to their BMI. In all the groups obstetric outcome was assessed.

Results: In normal BMI group 12% patients had preterm vaginal delivery. While In group of underweight patients 32% patients landed up in preterm delivery which has three times higher incidence. In overweight group 48% patients had caesarean section, while in normal BMI group it is only18% patients i.e. 3 times higher caesarean rate in high BMI group. 10% of patients belonging to normal BMI group needed induction of labor while 26% of patients in overweight group required induction .Thus incidence of induction of labor is more than double in overweight group. While only 16% patients had PPH in normal BMI group, 44% patients had PPH in overweight group i.e. three times higher. The frequency of preeclampsia was 22% in the overweight category and <1% in the normal group.

Conclusions: Higher prevalence of complications to the mother when BMI is not in the recommended normal range.



BMI, Maternal outcome

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Gordon YB, Lewis JD, Pendlebury DJ, Leighton M, Gold J. Is measurement of placental function and maternal weight worthwhile. Lancet. 1978;311(8072):1001-3.

Elder MG, Burton ER, Gordon H, Hawkins DF, McClure Browne JC. Maternal weight and girth changes in late pregnancy and the diagnosis of placental insufficiency. J. Obstet Gynecol Br. Commorth. 1970;77(6):481-91.

Allen L.H. et. Maternal body mass index and pregnancy outcome. Eur J Clin Nutr. 1994;48(3):568-77.

Spy ZM, et al. Outcome of Pregnancy in underweight women after spontaneous and induced ovulation, Br. Med. J. 1988;296(6627):962-3.

Moller B, Gebre-Medhin M, LindmarkG. Maternal weight, weight gain and termin the rural Tanzanian village of Hula. Br J Obstet Gynecol. 1989;96(2):158-66.

Addo VN. Body mass index, weight gain during pregnancy and obstetric outcomes. Ghana Med J. 2010;44(2):64-8.

Voigt M, Straube S, Zygmunt M, Krafczyk B, Schneider KT, Briese. Obesity and pregnancy a risk profile. Z Geburtshilfe Neonatol. 2008;212(6):201-5.

Ehrenthal DB, Jurkovitz C, Hoffman M, Jiang X, Weintraub WS. P repregnancy body mass index as an independent risk factor for pregnancy- induced hypertension. J Womens Health (Larchmt). 2011;20(1):67-72.

Baeten JM, Bukusi EA, Lambe M. Pregnancy complications and outcomes among overweight and obese nulliparous women. Am J Public Health. 2001;91(3):436-40.

Kongubol A, Phupong V. Prepregnancy obesity and the risk of gestational diabetes mellitus. BMC Pregnancy Childbirth. 2011;11(1):59.

Sahu, Meenakshi T., Anjoo Agarwal, Vinita Das, and Amita Pandey. "Impact of maternal body mass index on obstetric outcome." J Obstet and Gynaec Res. 2007;33(5):655-9.

Hendler I, Goldenberg RL, Mercer BM, Iams JD, Meis PJ, Moawad AH, MacPherson CA, Caritis SN, Miodovnik M, Menard KM, Thurnau GR, Sorokin Y. The Preterm Prediction Study: association between maternal body mass index and spontaneous and indicated preterm birth. Am J Obstet Gynecol. 2005 Mar;192(3):882-6. doi: 10.1016/j.ajog.2004.09.021. PMID: 15746686.

Ehrenberg HM, Dierker L, Milluzzi C, Mercer BM. Low maternal weight, failure to thrive in pregnancy, and adverse pregnancy outcomes. Am J Obstet Gynecol. 2003 Dec;189(6):1726-30. doi: 10.1016/s0002-9378(03)00860-3. PMID: 14710105.

Pevzner L, Powers BL, Rayburn WF, Rumney P, Wing DA. Effects of maternal obesity on duration and outcomes of prostaglandin cervical ripening and labor induction. Obstet Gynecol. 2009;114(6):1315-21.

Kominiarek MA, Vanveldhuisen P, Hibbard J, Landy H, Haberman S, Learman L et al. The maternal body mass index: a strong association with delivery route. Am J Obs & Gyn.e 2010;203(3):264.e1-264.e7.

Bhattacharya S, Campbell DM, Listion WA, Bhattacharya S: Effect of body Mass index On Pregnancy outcomes in Nulliparous women delivering singleton babies. BMC public Health. 2007;7(1):168.

Jensen DM, Ovesen P, Beck-Nielsen H, Malsted-Pedersen L, Sarensen B, Vintercetal. Gestational weight gain and pregnancy outcomes in 481obese glucose-tolerant women. Diabetes Care. 2005;28(9):2118-2122b.

Elíasdóttir ÓJ, Haròardóttir H, bórkelsson. The effect of maternal weight on pregnancy outcome. Laeknabladid. 2010;96(11):691-6.

UshaKiran TS, Hemmadi S, Bethel J, Evans J. Outcome of pregnancy in a woman with an increased body mass index. BJOG. 2005;112(6):768-772.