MATERNAL BODY MASS INDEX AS A METABOLIC DETERMINANT OF OBSTETRIC OUTCOMES IN PRIMIGRAVIDA WITH UNENGAGED HEAD AT TERM
DOI:
https://doi.org/10.69656/pjp.v22i3.1976Keywords:
Body mass index, Caesarean section, Foetal distress, Foetal head engagement, Maternal outcome, Neonatal outcome, Postpartum haemorrhage, PPH, Pregnancy, PrimigravidaAbstract
Background: Unengaged foetal head at term in primigravida women is associated with adverse obstetric outcomes. Maternal body mass index (BMI) can also influence labour and delivery. Limited information is available on the relationship between BMI and outcomes in women with unengaged foetal head. The objective of this study was to determine the association of maternal BMI with obstetric and neonatal outcomes among primigravida women with unengaged foetal head at term. Methods: This analytical study included 139 primigravida women aged 18–40 years with singleton, vertex pregnancies at 38–41 weeks and unengaged foetal head. Participants were recruited with non-probability consecutive sampling. BMI was categorized as ≤25 and >25 Kg/m². Maternal and neonatal outcomes included caesarean section (CS), postpartum haemorrhage (PPH), foetal distress and low Apgar score. Data were analysed using SPSS-24, and p<0.05 was considered statistically significant. Results: Among women with BMI ≤25 Kg/m², 44 (47.3%) underwent caesarean section compared with 16 (34.8%) with BMI >25 Kg/m² (p=0.161). PPH occurred in 11 (11.8%) women with BMI ≤25 Kg/m² and 4 (8.7%) with BMI >25 Kg/m² (p=0.575). Foetal distress occurred in 33 (35.5%) and 10 (21.7%), respectively (p=0.099), while low Apgar score occurred in 4 (4.3%) and 6 (13.0%) respectively (p=0.061). None of these associations was statistically significant. Conclusion: Maternal BMI was not significantly associated with caesarean section, PPH, foetal distress or low Apgar score among primigravida women with an unengaged foetal head at term.
Pak J Physiol 2026;22(3):149–52, DOI: https://doi.org/10.69656/pjp.v22i3.1976
Downloads
References
Babar KA, Bukhari N, Babar SA, Pervez FS, Azra, Aamir S. Outcomes of primigravida with engaged versus unengaged fetal head at term. Pak J Health Sci 2025;6(9):81–6.
Hussain S, Qurban S, Tahseen H, Javed K, Khurshid HN. Maternal outcome of primigravida patient with term pregnancy with engaged versus unengaged foetal head at onset of labour. Pak J Med Health Sci 2022;16(3):787–9.
Erasmus CR, Maharaj NR, Chuturgoon AA. Anthropometric measurements as predictors of nutritional status in black South African women during pregnancy. J Obstet Gynaecol Res 2025;51(1):e16184.
Chandrasekaran S, Usharani N, Barathi A. Impact of pre-pregnancy BMI and gestational weight gain on fetomaternal outcomes: a cross-sectional analytical study. Cureus 2026;18(3):e104941.
Froń A, Tomecka P, Orczyk-Pawiłowicz M. Impact of maternal overweight and obesity on adipokines during pregnancy and lactation. Int J Mol Sci 2025;26(19):9757.
Gandhi S, Chauhan K, Rajan P, Wanjari M, Sangoi L, Sangoi R. Impact of maternal body mass index on pregnancy outcomes among Indian women. Bioinformation 2024;20(10):1257–60.
Mahajan N, Mustafa S, Tabassum S, Fareed P. Outcome of high fetal station in primi-gravida at term in labour. Int J Reprod Contracept Obstet Gynecol 2016;5(3):873–7.
Salim NA, Satti I, Mahmoud AO. Unengaged head in primigravidae, mode of delivery and outcome (a case-control study) in Dongola-Sudan (2019). J Family Med Prim Care 2021;10(3):1254–7.
Khan AZ, Khan RA, Khan BA, Khattak Z. Postpartum hemorrhage in prolonged labor: frequency and associated factors in a tertiary care setting. North West J Med Sci 2026;5(2):17–21.
Cheung K, Bonet M, Frank KA, Oladapo OT, Hofmeyr GJ. Clinical algorithms for management of fetal heart rate abnormalities during labour. BJOG 2024;131(Suppl 2):102–11.
Lungameni J, Nghitanwa EM, Uusiku L. Neonatal factors associated with immediate low Apgar score in newborn babies in an intermediate hospital in Namibia: a case control study. Afr Health Sci 2023;23(3):141–8.
Youssef A, Dodaro MG, Del Prete B, Brunelli E. The fetal head-symphysis distance in intrapartum ultrasound assessment of the fetal head engagement. In: MalvasiA, (Ed). Intrapartum ultrasonography for labor management. Cham: Springer; 2021. p. 311–8.
Haroon M, Baqai S, Choudry A, Gul M, Ahmed M. Outcome of primigravida with unengaged fetal head at term or onset of labour. Pak Armed Forces Med J 2022;72(6):1854–7.
Khalifa E, El-Sateh A, Zeeneldin M, Abdelghany AM, Hosni M, Abdallah A, et al. Effect of maternal BMI on labor outcomes in primigravida pregnant women. BMC Pregnancy Childbirth 2021;21(1):753.
Dalbye R, Gunnes N, Blix E, Zhang J, Eggebø T, Nistov Tokheim L, et al. Maternal body mass index and risk of obstetric, maternal and neonatal outcomes: a cohort study of nulliparous women with spontaneous onset of labor. Acta Obstet Gynecol Scand 2021;100(3):521–30.
Mansukhani R, Shakur-Still H, Chaudhri R, Bello F, Muganyizi P, Kayani A, et al. Maternal anaemia and the risk of postpartum haemorrhage: a cohort analysis of data from the WOMAN-2 trial. Lancet Glob Health 2023;11(8):e1249–59.
Whitley J, Dazelle W, Kripalani S, Ahmadzia H. The association between body mass index and postpartum hemorrhage after cesarean delivery. Sci Rep 2023;13(1):11998.
Liu L, Ma Y, Wang N, Lin W, Liu Y, Wen D. Maternal body mass index and risk of neonatal adverse outcomes in China: a systematic review and meta-analysis. BMC Pregnancy Childbirth 2019;19(1):105.
Qazi Q, Liaqat N, Afridi F, Khattak S. Association of high pre-pregnancy body mass index with adverse maternal and perinatal outcomes. Pak J Med Sci 2024;40(3 Pt II):313–7.
Zong X, Wang H, Yang L, Guo Y, Zhao M, Magnussen CG, et al. Maternal pre-pregnancy body mass index categories and infant birth outcomes: a population-based study of 9 million mother-infant pairs. Front Nutr 2022;9:789833.
Ruba D, Bibi N, Ghafoor M, Anbreen F, Roshan N, et al. An assessment of fetomaternal outcomes and comparison between elderly and younger primigravida conditions among pregnant women. J Soc Obstet Gynaecol Pak 2023;13(3):272–6.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2026 Sehrish Fayyaz , Umber Naeem Rathore, Hania Ifzaal Aslam , Munazza Tayyab , Saima Manzoor, Amina Khalid

This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.
The author(s) retain the copyrights and allow their publication in Pakistan Journal of Physiology/Pak J Physiol/PJP to be FREE for research and academic purposes. It can be downloaded and stored, printed, presented, projected, cited and quoted with full reference of, and acknowledgement to the author(s) and the PJP. The contents are published with CC BY-ND 4.0 International License.








