The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where John R. G. Challis sits on this spectrum.
This scientist: 507 publications — 59th percentile
59% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 1,796 publications or more.
The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where John R. G. Challis sits on this spectrum.
This scientist: 85 D-Index — 29th percentile
29% of scientists in this discipline score the same or lower.
The last bar groups every scientist with 217 D-Index or more.
John R. G. Challis is affiliated with the University of Toronto in Canada and has contributed to research primarily in the fields of Medicine and Immunology and Microbiology. Their work spans several subfields, including Epidemiology, Pediatrics, Perinatology and Child Health, Obstetrics and Gynecology, Immunology, and Microbiology.
The scientist's research topics cover a range of issues related to reproductive health and development. These include:
Recent publications represent a diverse set of research areas and include the following papers:
Challis has collaborated frequently with a number of coauthors, notably:
The scientist has published in several well-regarded venues, including:
John R.G. Challis;Stephen G. Matthews;William Gibb;William Gibb;Stephen J. Lye
John R. Challis;Charles J. Lockwood;Leslie Myatt;Jane E. Norman
GD Thorburn;John Challis
E. R. Norwitz;J. N. Robinson;J. R.G. Challis
V. K. M. Han;N. Bassett;J. Walton;J. R. G. Challis
John R G Challis;Deborah M Sloboda;Nadia Alfaidy;Steven J Lye
J.R.G. Challis;J.R.G. Challis;D.M. Sloboda;D.M. Sloboda;S.G. Matthews;S.G. Matthews;A. Holloway;A. Holloway
S. A. Jones;A. N. Brooks;J. R. G. Challis
Ping Xu;Nadia Alfaidy;John R G Challis
J. R. G. Challis;A. N. Brooks
Frank H Bloomfield;Frank H Bloomfield;Frank H Bloomfield;Mark H Oliver;Mark H Oliver;Mark H Oliver;Paul Hawkins;Paul Hawkins;Paul Hawkins;Melanie Campbell;Melanie Campbell;Melanie Campbell
A.E. King;A. Paltoo;R.W. Kelly;J.-M. Sallenave
John R. G. Challis;I. John Davies;Kenneth J. Ryan
J. R. G. Challis
Felice Petraglia;Alberto Imperatore;John R. G. Challis
J. R. G. Challis;R. B. Heap;Doreen V. Illingworth
Timothy J. M. Moss;Deborah M. Sloboda;Lyle C. Gurrin;Richard Harding
Karolina A. Skinner;Karolina A. Skinner;John R.G. Challis;John R.G. Challis
Kang Sun;Kaiping Yang;Kaiping Yang;John R. G. Challis
John Challis;John Newnham;F. Petraglia;M. Yeganegi
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