ArticleJournal of pregnancy2020
The Effect of Pregnancy in the Hemoglobin Concentration of Pregnant Women: A Longitudinal Study.
Article in Journal of pregnancy, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Altitude-Related Laboratory Changes and a Novel Hemoglobin Estimation Model: A Retrospective Analysis in Children and Adults.International journal of laboratory hematology · 2026Article
- Association between high maternal haemoglobin levels in the first trimester and gestational diabetes mellitus: a prospective birth cohort study.Journal of global health · 2026Article
- Predictive efficacy of PASP combined with NT-proBNP for outcomes in pregnant women with severe cardiovascular disease: a single-centre retrospective observational study.BMC pregnancy and childbirth · 2026Observational
- Incidence and factors on anaemia during pregnancy in China: a multicentre prospective cohort study.Journal of global health · 2026Observational
- Initial and Longitudinal Trajectories in Hemoglobin Levels Predict the Prognosis of Patients With Premature Rupture of Membranes.American journal of reproductive immunology (New York, N.Y. : 1989) · 2025Article
- Prevalence and influencing factors of anemia among pregnant women across first, second and third trimesters of pregnancy in monitoring areas, from 2016 to 2020: a population-based multi-center cohort study.BMC public health · 2024Article
- Change in Hemoglobin Was Not a Reliable Diagnostic Screening Test for Postpartum Hemorrhage: A French Prospective Multicenter Cohort Study (HERA Study).Healthcare (Basel, Switzerland) · 2023Article
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Authors and funding
2 authors.
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Abstract
backgroundThe objective of this study was to estimate and identify the determinants of hemoglobin concentration before pregnancy, during pregnancy, and after labor and delivery.
methodsA prospective cohort study design was implemented. Data were collected from May 2015 to September 2018. A simple random sampling technique was used to select the participants. An interview technique was used to collect the data. Blood samples were collected before pregnancy, during each trimester, during labor and delivery, after third stage of labor, and at the 6-week postpartum period. Descriptive statistics were used to describe the profile of study participants. Generalized estimating equations were used to identify the determinants of hemoglobin concentration during each phase of pregnancy.
resultsThe mean hemoglobin concentrations of primigravida and multigravida before pregnancy were 12.41 g/dl and 10.78 g/dl, respectively. The hemoglobin concentration decreases with consecutive trimester reaching the lowest level at 42 days after delivery. The hemoglobin concentrations of pregnant women were decreased by hookworm 0.24 g/dl [95% CI:0.18-0.29], multiple pregnancy 0.16 g/dl [95% CI: 0.07-0.24], episiotomy 0.05 g/dl [95% CI: 0.01-0.09], gravidity 0.15 g/dl [95% CI: 0.09-0.21], age 0.03 g/dl [95% CI: 0.03-0.04], and gestational age 0.1 g/dl [95% CI: 0.09-0.11]. The hemoglobin concentration increased by iron supplementation 1.02 g/dl [95% CI: 0.97-1.07] and birth weight 0.14 g/dl [95% CI: 0.02-0.11].
conclusionPregnancy significantly decreases the hemoglobin concentration of pregnant women reaching the lowest point during labor and delivery.
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