T. Chard

9.9k citations

324 papers · 8.5k · 1 hit paper · h-index 45

Impact in

Obstetrics and Gynecology top 0.2%
- Pregnancy and preeclampsia studies
- Gestational Diabetes Research and Management
Pediatrics, Perinatology and Child Health top 0.1%
- Prenatal Screening and Diagnostics
- Birth, Development, and Health

Papers in

Obstetrics and Gynecology 107
- Pregnancy and preeclampsia studies 83
- Gestational Diabetes Research and Management 31
Pediatrics, Perinatology and Child Health 101
- Prenatal Screening and Diagnostics 44
- Birth, Development, and Health 43

Co-authors: Ray K. Iles (39 shared papers)MURIEL J. KITAU (24 shared papers)Howard Cuckle (7 shared papers)Y. B. Gordon (26 shared papers)Jurgis Gedis Grudzinskas (38 shared papers)A. T. Letchworth (9 shared papers)J. W. Densem (3 shared papers)N. C. Wathen (21 shared papers)
Journals: BJOG An International Journal of Obstetrics & Gynaecology (47 papers)Journal of Endocrinology (23 papers)The Lancet (20 papers)Human Reproduction (19 papers)European Journal of Obstetrics & Gynecology and Reproductive Biology (14 papers)
Partner nations: United Kingdom United States Denmark

In The Last Decade

T. Chard

314 papers receiving 7.6k citations

T. Chard's Hit Papers

align trajectories log scale

Maternal serum screening for Down's syndrome in early pregnancy. 1988 · 794 citations

What are hit papers?

Paper score: A paper's citations measured against the top-1% bar of its own field and year: the square root of citations ÷ bar, so 1 means right at the bar and 2 means four times its citations. The bar blends the citation counts that enter the top 1% of the paper's subfields in its year (weighted 89.5%), of those subfields over all years (0.5%) and of its year across all fields (10%); a subfield and year with fewer than 400 papers takes its year's bar. Papers from 2026 are not scored yet: in an unfinished year, when a paper appeared matters more than how it is cited.

Hit paper: A paper cited at least 1.5× the top-1% bar of its field and year: a paper score of at least √1.5.

1988 BMJ

Peers

Countries citing papers authored by T. Chard

Since Specialization

Citations

This map shows the geographic impact of T. Chard'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 T. Chard with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites T. Chard more than expected).

Fields of papers citing papers by T. Chard

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by T. Chard. 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 T. Chard. The network helps show where T. Chard may publish in the future.

Co-authors

The 25 scholars most cited alongside T. Chard, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with T. Chard Line = papers co-authored together T. Chard links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 324 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Maternal serum screening for Down's syndrome in early pregnancy. BMJ ·Nicholas J Wald, Howard Cuckle, J. W. Densem, Kiran Nanchahal, Patrick J Royston, T. Chard, James E. Haddow, George J. Knight Hit paper breakdown →	1988	794
2	PROSPECTIVE DIAGNOSIS OF SPINA BIFIDA The Lancet ·David J. H. Brock, J.B. Scrimgeour, T. Chard, Angela Leek, MURIEL J. KITAU, P. C. Leighton	1975	321
3	Antenatal maternal serum screening for Down's syndrome: results of a demonstration project. BMJ ·Nicholas J. Wald, Anne Kennard, J. W. Densem, Howard Cuckle, T. Chard, Les Butler	1992	250
4	Release of Oxytocin and Vasopressin by the Human Foetus during Labour Nature ·T. Chard, C. N. Hudson, C.R.W. Edwards, N. R. H. Boyd	1971	204
5	Possible placental origin of ACTH in normal human pregnancy Nature ·LESLEY H. REES, Christopher W. Burke, T. Chard, SHUI W. EVANS, A. T. Letchworth	1975	202
6	ORCADIAN VARIATION OF GH‐INDEPENDENT IGF‐BINDING PROTEIN IN DIABETES MELLITUS AND ITS RELATIONSHIP TO INSULIN. A NEW ROLE FOR INSULIN? Clinical Endocrinology ·Jeffrey M P Holly, Robert A. Biddlecombe, David B. Dunger, J. A. Edge, Stephanie A. Amiel, Richard J.S. Howell, T. Chard, LESLEY H. REES	1988	169
7	REVIEW: Pregnancy tests: a review Human Reproduction ·T. Chard	1992	129
8	Vasopressin Analogue DDAVP in Diabetes Insipidus: Clinical and Laboratory Studies BMJ ·Christopher R.W. Edwards, MURIEL J. KITAU, T. Chard, G. M. Besser	1973	122
9	Low maternal serum levels of pregnancy associated plasma protein A (PAPP‐A) in the first trimester in association with abnormal fetal karyotype BJOG An International Journal of Obstetrics & Gynaecology ·Bruno Brambati, Mary C. M. Macintosh, B. Teisner, S.D. Maguiness, Kishore Shrimanker, ALESSANDRO LANZANI, I. Bonacchi, L. Tului	1993	120
10	Circulating levels of IGF-I and IGF-binding protein-1 throughout pregnancy: relation to birthweight and maternal weight Journal of Endocrinology ·Frank A. Hills, T. Chard +1 other	1996	111
11	Insulin-like growth factors and their binding proteins in normal and abnormal human fetal growth. PubMed ·T. Chard	1994	102
12	The role of vaginal scan in measurement of endometrial thickness in postmenopausal women BJOG An International Journal of Obstetrics & Gynaecology ·M. N. NASRI, J. H. Shepherd, M. E. Setchell, David G. Lowe, T. Chard	1991	100
13	SPECIFIC AND SENSITIVE DETERMINATION OF PREGNANCY-SPECIFIC β1-GLYCOPROTEIN BY RADIOIMMUNOASSAY The Lancet ·Jurgis Gedis Grudzinskas, Diana Jeffrey, Y. B. Gordon, T. Chard	1977	100
14	Interpretation of single progesterone measurement in diagnosis of anovulation and defective luteal phase: observations on analysis of the normal range. BMJ ·N. C. Wathen, Les Perry, R J Lilford, T. Chard	1984	99
15	CONCENTRATIONS OF PREGNANCY-SPECIFIC β1-GLYCOPROTEIN IN MATERNAL BLOOD IN NORMAL PREGNANCY AND IN INTRAUTERINE GROWTH RETARDATION The Lancet ·Y. B. Gordon, Diana Jeffrey, J. Gedis Grudzinskas, T. Chard, A. T. Letchworth	1977	98
16	CIRCULATING LEVELS OF PROLACTIN DURING THE MENSTRUAL CYCLE Clinical Endocrinology ·Alan S. McNeilly, T. Chard	1974	97
17	RELATIONSHIP BETWEEN THE PUBERTAL FALL INSEX HORMONE BINDING GLOBULIN AND INSULIN‐LIKE GROWTH FACTOR BINDING PROTEIN‐I. A SYNCHRONIZED APPROACH TO PUBERTAL DEVELOPMENT? Clinical Endocrinology ·Jeffrey M P Holly, Claire P. Smith, David B. Dunger, Richard J.S. Howell, T. Chard, L. A. Perry, Martin Oswald Savage, Stefano Cianfarani	1989	91
18	Gestational Age-Dependent Expression of Insulin-Like Growth Factor-Binding Protein-1 (IGFBP-1) Phosphoisoforms in Human Extraembryonic Cavities, Maternal Serum, and Decidua Suggests Decidua as the Primary Source of IGFBP-1 in these Fluids during Early Pregnancy1 The Journal of Clinical Endocrinology & Metabolism ·N Martina, E. Kim, Usha Chitkara, N. C. Wathen, T. Chard, Linda C. Giudice	1997	85
19	IGFs and IGF-binding proteins in the regulation of human ovarian and endometrial function Journal of Endocrinology ·HS Wang, T. Chard	1999	82
20	A RAPID SEMI‐AUTOMATED METHOD FOR THE MEASUREMENT OF HUMAN CHORTONIC SOMATOMAMMOTROPHIN. THE NORMAL RANGE IN THE THIRD TRIMESTER AND ITS RELATION TO FETAL WEIGHT BJOG An International Journal of Obstetrics & Gynaecology ·A. T. Letchworth, R. J. Boardman, Christine Bristow, John Landon, T. Chard	1971	77

About T. Chard

T. Chard is a scholar working on Obstetrics and Gynecology, Pediatrics, Perinatology and Child Health, Reproductive Medicine, Endocrinology, Diabetes and Metabolism and Public Health, Environmental and Occupational Health, having authored 324 papers that have together received 8.5k indexed citations. Recurring topics across this work include Pregnancy and preeclampsia studies (83 papers), Prenatal Screening and Diagnostics (44 papers), Birth, Development, and Health (43 papers), Growth Hormone and Insulin-like Growth Factors (37 papers), Gestational Diabetes Research and Management (31 papers), Reproductive System and Pregnancy (26 papers), Neonatal Respiratory Health Research (25 papers) and Infant Nutrition and Health (21 papers). The work is most often cited by research in Obstetrics and Gynecology (1.8k citations), Pediatrics, Perinatology and Child Health (2.8k citations), Reproductive Medicine (992 citations), Endocrinology, Diabetes and Metabolism (1.3k citations) and Behavioral Neuroscience (209 citations). T. Chard has collaborated with scholars based in United Kingdom, United States and Denmark. Frequent co-authors include Ray K. Iles, MURIEL J. KITAU, Howard Cuckle, Y. B. Gordon, Jurgis Gedis Grudzinskas, A. T. Letchworth, J. W. Densem, N. C. Wathen, R J Lilford and LESLEY H. REES. Their work appears in journals such as BJOG An International Journal of Obstetrics & Gynaecology, Journal of Endocrinology, The Lancet, Human Reproduction and European Journal of Obstetrics & Gynecology and Reproductive Biology.

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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T. Chard

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T. Chard

T. Chard's Hit Papers

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All Works

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