Oi Ka Chan

588 total citations
28 papers, 427 citations indexed

About

Oi Ka Chan is a scholar working on Pediatrics, Perinatology and Child Health, Obstetrics and Gynecology and Epidemiology. According to data from OpenAlex, Oi Ka Chan has authored 28 papers receiving a total of 427 indexed citations (citations by other indexed papers that have themselves been cited), including 16 papers in Pediatrics, Perinatology and Child Health, 11 papers in Obstetrics and Gynecology and 10 papers in Epidemiology. Recurrent topics in Oi Ka Chan's work include Prenatal Screening and Diagnostics (11 papers), Pregnancy and preeclampsia studies (6 papers) and Hepatitis B Virus Studies (6 papers). Oi Ka Chan is often cited by papers focused on Prenatal Screening and Diagnostics (11 papers), Pregnancy and preeclampsia studies (6 papers) and Hepatitis B Virus Studies (6 papers). Oi Ka Chan collaborates with scholars based in Hong Kong, China and United Kingdom. Oi Ka Chan's co-authors include Tak Yeung Leung, Tze Kin Lau, Daljit Singh Sahota, Terence T. Lao, T. N. Leung, Lin Wai Chan, Yvonne Kwun Yue Cheng, Tak Yuen Fung, Yiu Man Chan and Jacqueline Pui Wah Chung and has published in prestigious journals such as PLoS ONE, American Journal of Obstetrics and Gynecology and Vaccine.

In The Last Decade

Oi Ka Chan

26 papers receiving 421 citations

Peers

Oi Ka Chan

PPCH

EPIDE

PHEOH

HEPAT

M. Buimer Netherlands

Pannee Sirivatanapa Thailand

Britta Panda United States

Ho‐Yen Chueh Taiwan

H Hofmann Austria

Leonie Penna United Kingdom

Michele Gangemi Italy

Denise Morotti Italy

H. Khaïri Tunisia

Sarah Geoghegan Ireland

M. Buimer Netherlands

Oi Ka Chan

91 ×0.5

PPCH

225 ×1.4

EPIDE

97 ×0.6

58 ×0.6

PHEOH

27 ×0.3

HEPAT

Citations per year, relative to Oi Ka Chan Oi Ka Chan (= 1×) peers M. Buimer

Countries citing papers authored by Oi Ka Chan

Since Specialization

Citations

This map shows the geographic impact of Oi Ka Chan's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Oi Ka Chan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Oi Ka Chan more than expected).

Fields of papers citing papers by Oi Ka Chan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Oi Ka Chan. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Oi Ka Chan. The network helps show where Oi Ka Chan may publish in the future.

Co-authorship network of co-authors of Oi Ka Chan

This figure shows the co-authorship network connecting the top 25 collaborators of Oi Ka Chan. A scholar is included among the top collaborators of Oi Ka Chan based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Oi Ka Chan. Oi Ka Chan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Li, Wei, et al.. (2025). New first trimester circulating angiogenic biomarkers in predicting early-onset and late-onset fetal growth restriction: a case-control study. BMC Pregnancy and Childbirth. 25(1). 562–562.

Chan, Oi Ka, et al.. (2024). The use of bubble charts in analyzing second stage cesarean delivery rates. American Journal of Obstetrics and Gynecology. 231(4). 465.e1–465.e10.

Chan, Oi Ka, et al.. (2024). The use of bubble charts in analyzing the global second-stage cesarean delivery rates: a systematic review. AJOG Global Reports. 4(1). 100312–100312. 2 indexed citations

Yu, Simon C.H., Yvonne Kwun Yue Cheng, Wing Ting Tse, et al.. (2020). Perioperative prophylactic internal iliac artery balloon occlusion in the prevention of postpartum hemorrhage in placenta previa: a randomized controlled trial. American Journal of Obstetrics and Gynecology. 223(1). 117.e1–117.e13. 38 indexed citations

Li, Wei, Claire Chung, Chi Chiu Wang, et al.. (2020). Monochorionic twins with selective fetal growth restriction: insight from placental whole-transcriptome analysis. American Journal of Obstetrics and Gynecology. 223(5). 749.e1–749.e16. 6 indexed citations

Cheng, Yvonne, L. W. Law, Tak Yeung Leung, Oi Ka Chan, & Daljit Singh Sahota. (2018). Soluble fms-like tyrosine kinase-1 and placental growth factor in Chinese pregnant women during second and third trimesters.. PubMed. 24 Suppl 3(3). 45–47. 3 indexed citations

Chan, Yiu Man, Oi Ka Chan, Yvonne Kwun Yue Cheng, et al.. (2017). Acceptance towards giving birth to a child with beta-thalassemia major – A prospective study. Taiwanese Journal of Obstetrics and Gynecology. 56(5). 618–621. 3 indexed citations

Cheng, Yvonne Kwun Yue, et al.. (2017). Soluble fms-like tyrosine kinase-1, placental growth factor and their ratio as a predictor for pre-eclampsia in East Asians. Pregnancy Hypertension. 11. 61–65. 7 indexed citations

Chim, S, et al.. (2012). Systematic Identification of Spontaneous Preterm Birth-Associated RNA Transcripts in Maternal Plasma. PLoS ONE. 7(4). e34328–e34328. 33 indexed citations

10.

Lao, Terence T., et al.. (2012). Breastfeeding initiation: is this influenced by maternal hepatitis B infection?. The Journal of Maternal-Fetal & Neonatal Medicine. 25(11). 2390–2394. 5 indexed citations

11.

Lao, Terence T., et al.. (2012). Relationship between age and prevalence of hepatitis B infection in first-year university students in Hong Kong. Infection. 41(2). 529–535. 11 indexed citations

12.

Lao, Terence T., et al.. (2011). Maternal understanding of commercial cord blood storage for their offspring – a survey among pregnant women in Hong Kong. Acta Obstetricia Et Gynecologica Scandinavica. 90(9). 1005–1009. 16 indexed citations

13.

Lao, Terence T., Oi Ka Chan, Tze Kin Lau, et al.. (2011). Seroprevalence of varicella zoster virus among pregnant women in Hong Kong: Comparison with self-reported history. Vaccine. 29(46). 8186–8188. 7 indexed citations

14.

Chan, Oi Ka, Daljit Singh Sahota, Tak Yeung Leung, et al.. (2010). Nausea and vomiting in health‐related quality of life among Chinese pregnant women. Australian and New Zealand Journal of Obstetrics and Gynaecology. 50(6). 512–518. 29 indexed citations

15.

Cheung, Chun Wai, Tak Yeung Leung, Daljit Singh Sahota, et al.. (2010). Outcome of induction of labour using maternal characteristics, ultrasound assessment and biochemical state of the cervix. The Journal of Maternal-Fetal & Neonatal Medicine. 23(12). 1406–1412. 28 indexed citations

16.

Sahota, Daljit Singh, Tak Yeung Leung, Lin Wai Chan, et al.. (2009). First‐trimester fetal nasal bone length in an ethnic Chinese population. Ultrasound in Obstetrics and Gynecology. 34(1). 33–37. 14 indexed citations

17.

Chan, Yiu Man, Daljit Singh Sahota, Oi Ka Chan, Tak Yeung Leung, & Tze Kin Lau. (2009). Miscarriage after invasive prenatal diagnostic procedures: how much risk our pregnant women are willing to take?. Prenatal Diagnosis. 29(9). 870–874. 9 indexed citations

18.

Chan, Oi Ka, et al.. (2009). Determinants of hepatitis B vaccine uptake among pregnant Chinese women in Hong Kong. International Journal of Gynecology & Obstetrics. 106(3). 232–235. 16 indexed citations

19.

Sahota, Daljit Singh, Tak Yeung Leung, T. N. Leung, Oi Ka Chan, & Tze Kin Lau. (2008). Fetal crown–rump length and estimation of gestational age in an ethnic Chinese population. Ultrasound in Obstetrics and Gynecology. 33(2). 157–160. 67 indexed citations

20.

Chan, Lin Wai, Oi Ka Chan, Daljit Singh Sahota, et al.. (2008). Expectation and knowledge of pregnant women undergoing first and second trimester ultrasound examination in a Chinese population. Prenatal Diagnosis. 28(8). 739–744. 10 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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