Maternal Near-Miss in a Tertiary Care Hospital: A Prospective Study From North India

Full text rendered from the published PDF. The PDF is the version of record; if the two differ, the PDF governs.

Abstract

Background : Maternal near-miss is defined as a ‘woman who nearly died but survived a complication during pregnancy, childbirth or within 42 days of termination of pregnancy’. A sudden and unexpected event during pregnancy, childbirth, or even after delivery, is a risk that is faced by every pregnant woman.

Aim: This study aimed to establish the incidence of maternal near-misses, and to evaluate the clinical and epidemiological profile and causes of maternal near-miss.

Materials and Methods: This was an observational prospective study, conducted in Lalla Ded Hospital for a period of 18 months after obtaining ethical clearance. Women who fulfilled any of the WHO criteria for MNM were included in the study as maternal near-miss cases.

Results: The hospital witnessed 36,273 live births over the period of the study, of which 821 involved a near-miss. This equates to a MNM incidence ratio of 22.63 per 1000 live births. The mortality index in our study was 3.97%, and the near-miss to mortality ratio was 24.14:1. Haemorrhage was the leading cause of MNM (N=429 or 2.25%), followed by hypertensive disorders of pregnancy (N=280 or 34.10%). Anaemia was the most common associated factor and was present in 460 (56.03%)patients.

Conclusion: Early identification of risk factors for placenta accreta spectrum, hypertensive disorders of pregnancy, medical disorders complicating pregnancy, anaemia, previous Caesarean section, and multifoetal pregnancy, among others, and thereby prompt management of such conditions, plays a critical role in the optimal management of MNM.

Keywords: Maternal Near-Miss, Mortality, Pregnancy

Introduction

Maternal mortality remains a significant chal- lenge in developing nations, and maternal near- miss (MNM), referring to cases in which a woman nearly dies but survives a severe compli- cation during pregnancy, childbirth, or within 42 days postpartum/ post-termination, serves as a crucial indicator of the quality of maternal healthcare [1]. The primary causes of MNM in- clude obstetric complications such as severe haemorrhage, hypertensive disorders such as pre- eclampsia and eclampsia, sepsis, obstructed la- bour, and pre-existing medical conditions such as heart disease, diabetes, and anaemia. Contrib- uting factors also include healthcare system defi- ciencies such as delayed access to care and inad- equate infrastructure [1]. The consequences of MNM are significant, ranging from immediate physical and psychological impacts on the mother to long-term health issues, social and eco- nomic burdens, and adverse neonatal outcomes. Prevention strategies focus on improving access to timely, skilled care, enhancing healthcare in- frastructure, raising community awareness, and implementing evidence-based guidelines [2]. Global statistics reveal disparities in MNM rates

between high- and low-income countries, under- scoring the need for targeted interventions. Cur- rent research highlights the importance of ongo- ing studies to address knowledge gaps and guide future policies aimed at reducing MNM and im- proving maternal health outcomes [2].

In 2009, the World Health Organization (WHO) defined maternal near miss as ‘a woman who nearly died but survived a complication during pregnancy, childbirth, or within 42 days of termi- nation of pregnancy’ [1]. The criteria for identi- fying MNM cases are categorised into clinical, laboratory, and management-based indicators that reflect the severity of complications during pregnancy, childbirth, or within 42 days postpar- tum. Clinically, MNM includes conditions such as severe pre-eclampsia with hypertension and organ dysfunction, eclampsia marked by convul- sions, severe postpartum haemorrhage with blood loss exceeding 1,000 ml, uterine rupture, and severe systemic infections such as sepsis. La- boratory-based criteria include severe acute anaemia with haemoglobin levels below 7 g/dl, coagulation disorders such as disseminated intra- vascular coagulation (DIC), and acidosis with a pH below 7.1. Management-based criteria in- clude the use of critical interventions such as blood transfusions, vasoactive drugs, hysterec- tomy, admission to an intensive care unit (ICU), prolonged hospitalisation due to severe compli- cations, mechanical ventilation for more than 12 hours, and dialysis for renal failure. These crite- ria help healthcare providers to effectively iden- tify and manage MNM cases, ultimately improv- ing maternal health outcomes.

India continues to grapple with alarmingly high maternal mortality rates, witnessing approxi- mately 120 maternal deaths per day [2]. A paper released by the WHO in 2015, titled ‘Trends in Maternal Mortality: 1990 to 2015’, draws esti- mates from various reputable sources such as the World Bank Group, United Nations Population Division, UNICEF, UNFPA, and WHO. Accord

ing to this publication, Nigeria and India collec- tively accounted for more than a third of global maternal deaths in 2015, with Nigeria recording approximately 58,000 deaths (19%) and India with 45,000 deaths (15%) [3]. Despite a decline in maternal mortality ratio (MMR), from 301 per 100,000 live births in 2001 to 167 per 100,000 in 2014, India failed to meet the target set by Millennium Development Goal (MDG)5 (MMR < 150/100,000 live births) [4,5]. The Sustainable Development Goals, particularly Goal 3 (target 3.1), aim to further reduce MMR to below 70/100,000 live births by 2030 [6]. Maternal near miss (MNM) remains a vital pub- lic health issue in India, with significant maternal mortality and morbidity rates, particularly in ru- ral and underserved areas. While the WHO’s cri- teria for MNM help identify life-threatening complications that women survive, the topic’s importance in India extends beyond these defini- tions. MNM highlights critical gaps in the healthcare system, such as delayed access to care, and reflects the challenges posed by poverty, gender inequality, and inadequate healthcare in- frastructure. Addressing MNM in India is essen- tial for improving maternal health outcomes, tar- geting interventions more effectively, and pro- moting broader socio-economic development by ensuring that every woman has access to the care she needs during pregnancy and childbirth. The majority of maternal deaths and disabilities are preventable, given the availability of established medical solutions. Sadly, 99% of maternal deaths occur in developing countries characterised by inadequate transport systems, limited access to skilled caregivers, and deficient emergency ob- stetric services [7].

Methodology

This was an observational prospective study, conducted over a period of 18 months from Au- gust 2017 to February 2019. The study was con- ducted in the Department of Obstetrics and Gy- naecology at Lal Ded Hospital, Srinagar. Lalla

Ded is a 700-bed tertiary care maternity hospital associated with Govt. Medical College, Srinagar, and is known to cater to hundreds of thousands of patients annually. After obtaining proper in- formed consent, data were collected from those patients who experienced MNM events during their hospital stay or upon admission, using a proforma survey questionnaire. Characteristics including the patient’s age, parity, gestational age at the time of near-miss, type of admission, booking status, and interventions taken to save the life of the patient, were noted. Details of in- vestigations undertaken for anaemia, septicae- mia, organ system dysfunction/failure, etc., were collected from the patient’s case records. The mode of delivery and foetal outcome were also noted. Women who fulfilled any of the WHO cri- teria for MNM were considered eligible for this study as maternal near-miss cases.

The selection criteria included women aged 15- 49, who were currently pregnant, post-partum, or had been pregnant within the past 42 days, and who had experienced severe complications dur- ing any of the abovementioned stages. The study specifically targeted those who had survived se- vere complications such as haemorrhage, hyper- tensive disorders, sepsis, or other conditions that meet the World Health Organization’s maternal near-miss (MNM) criteria, including those re- quiring intensive care or specialised interven- tions. Conversely, the exclusion criteria elimi- nated women who were not pregnant and had not been pregnant within the past 42 days, those without recent pregnancy-related complications,

as well as cases that did not meet the MNM se- verity threshold. Also excluded were participants with incomplete records that failed to confirm their MNM status, as well as non-survivors, as the focus was solely on survivors.

Data Analysis

To correct any errors, the data were first entered into a Microsoft Excel spreadsheet and examined thoroughly. IBM Corporation’s SPSS Statistics for Windows (Version 27.0, released in 2020, Armonk, NY, USA) was used for statistical anal- ysis, and frequencies and percentages were used to represent categorical variables.

Ethics

The study was conducted according to the insti- tutional ethics committee guidelines, and proper ethical clearance was obtained from the Ethical Committee of Government Medical College Sri- nagar (IRBGMC/Gynae).

Results

The total number of live births during the study period was 36,273, of which 821 involved near- miss cases. There were also 34 maternal deaths in the hospital during the same period. Our study revealed a maternal near-miss inci- dence ratio of 22.63 per 1000 live births, a ma- ternal mortality index of 3.97%, and a near-miss to mortality ratio of 24.14:1.The median age of near-miss patients was 29 years (18-37), with the majority of patients aged between 20-35 years. Most of the patients (N=427;52%) were parity 1- 2, and 319 (38.9%) were nullipara (Table 1).

The majority of the patients were near-miss upon arrival at the hospital (N=468;57%), while al- most 337 (41.05%) were admitted with a disorder and became near-miss. Only 16 patients (1.95%) became near-miss having been admitted without any disorder. Most of the near-miss patients (N=651;79.29%)required admission to the hospi- tal’sIntensive Care Unit (ICU), while other near- misses were managed in the High Dependency Ward (HDW) or High-Risk Ward. The mean du- ration of hospital stay for near-miss patients was 14 days, and the majority of those requiring ICU

admission (N=537;65.4%) remained there for longer than 24 hours. Eighty-seven out of 821 near-miss patients did not seek antenatal care (ANC), the most common reason being the sud- den onset of disease such as ectopic pregnancy, or abortion. Other reasons were obstacles to healthcare access due to living in difficult areas, and lack of awareness or of an attendant (Table 2). However, the majority of near-miss patients (N=700;85.26%) did receive ANC from a medi- cal officer/ specialist.

hospitals. Healthcare personnel should be sensi- tised to obstetric emergencies and refer promptly when necessary. Funding: Not applicable (no funding received). Acknowledgements: None. Conflict of Interest: The authors have no con- flicts of interest to declare.

Table 1. Patients’ demographic variables.
Age (Years)N%
<20587.06
20-3562375.88
>3514017.05
Parity
0 (nullipara)31938.9
1-242752
3-4455.5
>5303.7
E-mail: fizamink@gmail.com
Gestational Age
<13 Weeks10112.3
13-28 Weeks668.04
>28 Weeks53164.68
Postpartum12314.98
Type of Admission
Self20524.97
Referred61675.03
Of Referred
Transport provided49380.03
Attended by staff14723.86
Severity
Needed ICU admission65179.29
Needed HDW/ High-riskward 17020.71
Hospital Stay
<10 Days15619
10-20 Days60874.06
>20 Days576.94
ICU Stay (of total near-misses)
>24 Hours53765.4
<24 Hours11413.9
Antenatal Care
Received antenatal care73489.4
Did not receive antenatalcare 8710.59
The third trimester poses thehighest risk for tions. About123 (14.98%) were post-partum at
pregnant women to experiencelife-threatening the timeof near-miss. Haemorrhage (N=429;
situations, and most of our participants(N=531; 52.25%),followed by hypertensive disorders of
64.68%) were indeed beyond28 weeks gestation pregnancy(N=280; 34.10%), were the leading
when they sufferednear-miss condi causes ofMNM in our study (Figure 1).
Table 2. Reasons antenatal care was not sought
ReasonANC not sought N% of those not receiving ANC % of total near-
misses
Lack of awareness 1112.64 1.33
Lack of attendant 33.45 0.36
Obstacles to access 1011.49 1.21
(living on hilly terrain, difficult areas)
Sudden onset of disease 6372.41 7.67
(ectopic, abortion)
Total patients who did not receive ANC 87100 10.59
About 249 (30.33%) MNM patients were illit-(41.04%) were intubated. Massive blood transfu-
erate. Anaemia (N=460; 56.03%) was found tosion was required by 331 (40.31%) of the pa-
be the most common indirect factor associatedtients, while 303 (36.9%) needed inotropic sup-
with MNM, followed by previous Caesarean sec-port. A total of 253 patients (30.8%) required
tion (N=331; 40.32%). A total of 651 (79.29%)magnesium sulfate therapy for hypertension
MNM patients were admitted to ICU, and 337(Figure 2).
Figure 2. Distribution of patientsaccording to management.
E-mail: fizamink@gmail.com
Our study found that haematology/coagulationquality of care. Conversely, a lower index indi-
was the most affected system in MNM patientscates fewer deaths among women with life-
(N=207; 25.21%). Most near-miss patients deliv-threatening conditions, suggesting better quality
ered by Caesarean section 497 (60.53%), andof care. In our study, the mortality index was cal-
most had live births 590 (71,86%).culated as 3.97%, indicating a better quality of
care compared with studies conducted by Taher
IV. DISCUSSIONet al. in Egypt (MI = 8.6%) [15], El-Agwany et
This study presents an examination of cases ofal. in Egypt (MI = 7.5%) [16], and Roopa et al.
maternal near-miss based on prospective datain Karnataka, India (MI = 14.9%) [17].
from a tertiary care facility in Srinagar, JammuOur study identified obstetric haemorrhage as the
and Kashmir. Near-miss cases were identified ac-leading cause of potentially life-threatening con-
cording to the MNM criteria provided by theditions and near-miss cases, accounting for
WHO (2009). The MNM incidence ratio calcu-52.25% of cases, followed by hypertensive disor-
lated in our study was 22.63 per 1000 live births;ders of pregnancy at 34.10%. Similar trends have
this aligns with findings from other studies in de-been observed in various other studies. Norhayati
veloping countries, which range from 15 to 40et al. reported comparable results in their study
per 1000 live births [8]. Kamal et al. reported aconducted in Malaysia [18], and a study by
similar near-miss incidence ratio of 24 per 1000El‑Agwany et al.in Egypt yielded similar find-
live births in their study conducted at a tertiaryings [16]. Numerous studies in India have also
care medical college in Jharkhand, India [8].demonstrated consistent results [19, 20].
Similarly, Naderi et al. found a comparable inci-In contrast, a study conducted in Syria identified
dence ratio of 25.2 per 1000 live births in theirhypertensive disorders of pregnancy as the pri-
study in Iran [9].mary cause of near-miss cases (52%), followed
The near-miss to mortality ratio in our study wasby obstetric haemorrhage. Another study in Ethi-
24.14:1, indicating that for every 24 to 25 occur-opia highlighted obstructed labour (45%) as the
rences of a life-threatening condition, one mater-predominant cause, followed by haemorrhage
nal death occurred. Studies conducted in Nepal[13, 21].
and southern India reported ratios of 7.2:1 andIndirect causes, often overlooked, also play a sig-
5.34:1 respectively, while a study in Maharash-nificant role in MNM cases. In our study, anae-
tra, India, reported a ratio of 14.2:1. Higher ratiosmia was identified as the most common indirect
are indicative of better care; thus, our ratio is su-cause, affecting nearly 460 women (56.03%).
perior to those reported in the aforementionedSimilar findings were reported by Tallapureddy
studies. Conversely, a Syrian study showed a bet-et al. [11] and Sarma et al. [22] in their respective
ter ratio than ours, of 60:1. However, these fig-studies. Additionally, the majority of our patients
ures all pale in comparison to those reported in(52%) had parity between 1 and 2, aligning with
Western Europe, where ratios between 117–findings from a study conducted in Jharkhand,
223:1 have been observed, possibly due to betterIndia [23].
available health care [10–14].In our study, a majority of near-miss patients
The maternal mortality index (MI) serves as a re-were multiparous (61.2%), while 38.9% were
liable indicator of healthcare quality within an in-nulliparous. Similar results were reported by Ku-
stitution [MI = MD / (MNM + MD)]. A higherrugodiyavar et al. in their study in Karnataka, In-
index suggests more deaths among women withdia, and by Ranatunga et al. from Sri Lanka
life-threatening conditions, indicating lower[24,25].
The third trimester of pregnancy poses the high-similar percentage of patients being near-miss
est risk for potentially life-threatening situationscases upon arrival at their hospital [8].
in pregnant women. In our study, 64.68% of nearA multidisciplinary approach to ICU manage-
misses occurred after 28 weeks of gestation, fol-ment, involving obstetricians, intensivists, and
lowed by the postpartum period at 14.98%. Sim-anaesthesiologists, is crucial for saving maternal
ilar findings were reported in a study by Gazalalives. In our study, 79.29% of MNM patients re-
et al. [26].quired ICU care, a finding echoed in many other
A significant majority of MNM cases (60.53%)studies [8, 26].
underwent delivery by Caesarean section, likelySocial factors, such as a lack of financial re-
due to the severity of their obstetric conditionssources, lack of awareness, and, occasionally,
necessitating urgent intervention. This findinglack of attendants, were found to influence near-
aligns with those of Umadevi et al. [27]. How-miss incidents in our study. At the administrative
ever, internationally, studies have noted an asso-level, issues such as inadequate transport, short-
ciation between the increasing incidence of pla-ages of blood and blood products, and lack of sur-
centa previa and accreta with rising Caesareangeons and operating rooms at referral centres ad-
delivery rates and previous Caesarean sections,versely affected near-miss occurrences. Address-
potentially leading to complications such as near-ing these challenges promptly is essential to the
miss incidents [28, 29]. Therefore, while Caesar-development of an effective maternal healthcare
ean section may save patients in near-miss situa-system.
tions, it also presents risks such as accreta, whichThe strengths of this study include the use of
can lead to near-miss incidents in future pregnan-standardised WHO criteria andthe inclusion of
cies, making Caesarean section a double-edgeddiverse participants, while its limitations involve
sword.potential selection bias, incomplete data, varia-
In our study, the haematological system was thebility in healthcare quality, and challenges asso-
most commonly affected (25.21%), followed byciated with prospective analysis.
the renal (17.78%) and respiratory (12.79%) sys-V. CONCLUSION
tems. A study by Ismail et al.in Egypt [15] also
showed haematology as the most commonly af-Effective management of MNM is a robust indi-
fected system in near-miss cases, consistent withcator of the quality of a state’s healthcare system.
our findings.Haemorrhage and hypertensive disorders were
A substantial portion of near-miss patientsthe leading causes of MNM events in our study
(75.03%) were referred to our hospital from sur-population. Only prompt and appropriate inter-
rounding areas, similar to findings in other stud-vention can avert the catastrophe of death in such
ies [26, 30]. Additionally, 65.7% of near-miss pa-patients; hence, an ICU with appropriate bed
tients in our study were unbooked, a trend seenstrength, as recommended by MCI, is essential in
in studies conducted by Bindal et al. [20] andevery obstetrics and gynaecology hospital. More-
Kamal et al. [8]in India.over, the fact that the majority of near-miss cas-
Upon arrival at our hospital, 57% of patientsesin our study occurred before the patients’ arri-
were near-miss cases while almost 337 (41.05%)val at the hospital, underscores the importance of
were admitted with a disorder and became near-eliminating pre-hospital barriers. This can be
miss. Only 16 patients (1.95%) became near-achieved by improving the overall healthcare
miss having been admitted without any disorder.system, from the level of primary health centre,
In line with our findings, Kamal et al. reported athrough sub-district hospitals, and up to district
Distribution according to causes of near-miss.
Figure 1. Distribution according to causes of near-miss.
Distribution of patients according to management.
Figure 2. Distribution of patients according to management.

References

  1. Park K. Park’s Textbook of Preventive and Social Medicine. 23rd ed. Jabalpur: BanarsidasBhanot Publishers; 2015. p. 556.
  2. ‘Evaluating the quality of care for severe pregnancy complications The WHO near-miss approach for maternal health’ World Health Organization. ISBN 978 92 4 150222 1 (NLM classification: WQ 240) © World Health Organization 2011.
  3. Ministry of Statistics and Programme Implementation. Millennium Development Goals India Country Report 2015. New Delhi: Government of India; 2015.
  4. Sample Registration System Bulletin 2014. Office of the Registrar General. Ministry of Home Affairs, Government of India. Available from:http://www.censusindia.gov.in/vital_statistics/SRS_Bulletins/SRS_Bulletins‑September_2014.
  5. Government of India. Ministry of Health and Family Welfare. Family Welfare Statistics in India; 2011. p. 11.
  6. World Health Organization from MDGs to SDGs: A New Era for Global Public Health; 2016‑2030. Available from:http://www.who.int/mediacentre/events/meetings/2015/MDGs‑SDGs‑Summary.pdf. [Last accessed on 2016 Jul 20].
  7. Lynch CB, Keith LG, Lalonde AB, Arulkumaran SS, Karoshi M (2005):A text book of postpartum hemorrhage, B-Lynch: post partum hemorrhage today.
  8. Samarina Kamal, Priyankur Roy, ShashiBAL A study of maternal near miss cases at a tertiary care medical college of Jharkhand, India. Int J Rerop Contracept ObstetGynecol 2017 jun 6 (6) 2375-2380.
  9. TaybehNaderi, ShohrehForoodnia, SamanehOmidi, Faezeh Samadani, NouzarNakhaee, studied “Incidence and correlates of maternal near miss in southeast IRAN” International Journal of Reproductive Medicine Vol. 2015 (2015), Article ID 914713.
  10. Shrestha NS ,Saha R, Karki C studied “Near miss maternal morbidity and maternal mortality at Kathmandu Medical College Teaching Hospital” Kathmandu university medical journal, 2010, vol 8 no2 Issue 30, 222-226.
  11. ShravyaTallapureddy, Revathi Velagaleti, HimabinduPalutla, Chaitanya Venkata Satti“Near‑Miss” obstetric events and maternal mortality in a tertiary care hospital, Indian Journal of Public Health ¦ Volume 61 ¦ Issue 4 ¦ October-December 2017, pg 306.
  12. Padmaja Y. Samant, Juhi Dhanawat. Maternal near miss: an Indian tertiary care centre audit, Int J Reprod Contracept Obstet Gynecol. 2019 May;8(5):1874-1879.
  13. Almerie Y, Almerie MQ, Matar HE, et al. Obstetric near miss and maternal mortality in maternity university hospital, Damascus, Syria: a retrospective study. BMC Pregnancy and Childbirth. 2010:10:65.
  14. van Roosmalen J, Zwart J. Severe acute maternal morbidity in high-income countries. Best Pract Res Clin ObstetGynaecol2009;23:297-304.
  15. Mohamed Taher Ismail, Mohamed Cherine Ramadan, Ahmad Shaaban Mohamed, Ahmed MoatazElshishini. Clinical Intervention for Maternal Near Miss Cases in ElGalaa Teaching Hospital. The Egyptian Journal of Hospital Medicine (July 2018) Vol. 72 (1), Page 3839-3845.
  16. El‑Agwanyet al. Severe Maternal Outcomes: World Health Organization Maternal Near‑Miss and Maternal Mortality Criteria in University Tertiary Hospital Egypt , Apollo Medicine ¦ Volume 16 ¦ Issue 2 ¦ (April-June 2019) pp. 74-78.
  17. Roopa PS, Shailja Verma, Lavanya Rai, Pratap Kumar, Murlidhar V. Pai and Jyothi Shetty. “Near Miss” Obstetric Events and Maternal Deaths in a Tertiary Care Hospital: An Audit. Journal of Pregnancy, Vol. 2013, Article ID 393758, 5 pages.
  18. Mohd Noor Norhayati, Nik Hussain Nik Hazlina, ZaharahSulaiman and MohdYacob Azman et al. Severe maternal morbidity and near misses in tertiary hospitals, Kelantan, Malaysia: a cross-sectional study, RESEARCH ARTICLE Open Access, BMC Public Health 2016, 16:229.
  19. Kalra P, Kachhwaha CP. Obstetric Near Miss Morbidity and Maternal Mortality in a tertiary care centre in Western Rajasthan. Indian Journal of Public Health, 2014; 58 (3): 199-1.
  20. Jyoti Bindal, Garima Solanki. Clinical and etiological study of maternal near-miss at a tertiary referral hospital of Central India. Indian Journal of Obstetrics and Gynaecology Research 2016; 3(1): 28-31.
  21. Gedefaw M, Gebrehana H, et al.Assessment of maternal near miss at debremarkos referral hospital, Northwest Ethiopia: five years experience. Open Journal of Epidemiology 2014;4; 199-207.
  22. Sarma HKD, Sarma HK, Kalita AK. A prospective study of maternal near-miss and maternal mortality cases in FAAMCH, Barpeta; with special reference to its etiology and management: first 4 months report. J ObstetGynaecolBarpet. 1(2).
  23. Pujitha KS, Sheela SR, S NJ. A study of maternal and fetal outcome in cardiac disease in pregnancy at tertiary care center. Int J Reprod Contracept Obstet Gynecol. 2017;6(11):5095–8.
  24. Mahesh D. Kurugodiyavar, Kashavva B. Andanigoudar, DattatreyaD. Bant, Manjunath S. Nekar. Determinants of maternal near miss events: a facility based case-control study. Int J Community Med Public Health. 2019 Aug;6(8):3614-3620.
  25. Ranatunga GA, Akbar JF, Samarathunga S, et al Severe acute maternal morbidity in a tertiary careinstitution. Sri Lanka J ObstetGynecol 2012; 34; 135-43.
  26. Gazala Yasmin, Rehana Najam, Shahreyar Ghazi, AsthaLalwani “Maternal near miss events: a prospective observational study in a tertiary care centre” International Journal of Reproduction, Contraception, Obstetrics and Gynecology l. 2016 Sept;5(9):3088-3093.
  27. SreekumariUmadevi, Simi Ayesha, Sreekumari Radha, Anish ThekkumkaraSurendran Nair, Krishna DevadhasSulochana “Burden and causes of maternal mortality and near-miss in a tertiary care centre of Kerala, India”, International Journal of Reproduction, Contraception, Obstetrics and Gynecology 2017 Mar;6(3):807-813.
  28. Marshall NE, Fu R, Guise J. Impact of cesarean deliveries on maternal morbidity:a systematic review. Am J Obstet Gynecol. 2011;205:262. e1-8.
  29. American College of Obstetricians and Gynecologists. Placenta Accreta. Committee Opinion No.529. Obstet Gynecol. 2012;120:207–11.
  30. EwnetuFirdawekLiyew, Alemayehu WorkuYalew ,MesganawFantahun Afework, Birgitta Esse´, “Incidence and causes of maternal near-miss in selected hospitals of Addis Ababa, Ethiopia”PLoS ONE 12(6):e0179013.https://doi.org/ 10.1371/journal.pone.0179013.