ArticlePloS one2020
Community perceptions on causes of high dizygotic twinning rate in Igbo-Ora, South-west Nigeria: A qualitative study.
Article in PloS one, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.
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Who cites it
6 citing papers in PubMed, 1 synthesis or guideline pooled it, 17 citations in OpenAlex.
- Genome-wide association study meta-analysis of dizygotic twinning illuminates genetic regulation of female fecundity.Human reproduction (Oxford, England) · 2024Pooled it
- What rural residents want from blood donation services: a discrete choice experiment.Frontiers in public health · 2026Article
- Tapping into the potential of okra (Frontiers in plant science · 2025Review
- Trends and Outcomes of Twin Births in Southwest Nigeria: A 14-Year Retrospective Cohort Study.Exploratory research and hypothesis in medicine · 2024Article
- A gene-culture co-evolutionary perspective on the puzzle of human twinship.Evolutionary human sciences · 2024Article
- Iranian school-aged twin registry: preliminary reports and project progress.BMC pediatrics · 2023Article
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Authors and funding
6 authors at 5 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
backgroundDizygotic (DZ, non-identical) twinning rates vary widely across different regions in the world. With a DZ twinning rate of 45 per 1000 live births, Igbo-Ora Community in South-west Nigeria has the highest dizygotic (DZ) twinning rate in the world. Although several postulations exist on the causes of high DZ twinning rates in Igbo-Ora, no study has yet been conclusive on a definite causative agent.
objectiveUsing qualitative methods, this study explored the perceptions and beliefs of Igbo-Ora residents about the causes of high DZ twinning rates.
methodsFocus group discussion sessions and key informant interviews were organized among fathers and mothers of twins, those without twins, and health care providers. Key informant interviews were also held with persons considered to be custodians of culture who may have knowledge relevant to twinning such as traditional rulers, and traditional birth attendants; as well as health care providers, mothers and fathers of twins, and adult twins.
resultsThe results showed three factors featuring as the leading perceived causes of twinning in the community. These included twinning being an act of God, hereditary, and being due to certain foods consumed in the community. Contrary to reports that the consumption of a species of yam (Dioscorea rotundata) may be responsible for the DZ twinning in this Community; yam was not prioritized by the respondents as associated with twinning. In contrast, participants repeatedly mentioned the consumption of "ilasa" a soup prepared with okra leaves (Abelmoschus esculenta) with water that is obtained from the community, and "amala" a local delicacy produced from cassava (Manihot esculenta) as the most likely dietary factors responsible for twinning in the community.
conclusionSince the same foods are consumed in neighboring communities that have lower rates of twinning, we conjecture that nutritional and other environmental factors may produce epigenetic modifications that influence high DZ twinning rates in Igbo-Ora community. We conclude that more directed scientific studies based on these findings are required to further elucidate the etiology of the high rate of DZ twinning in Igbo-Ora.
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