Fred J. Karsch

16.9k citations

181 papers · 15.1k · 4 hit papers · h-index 72

Impact in

Reproductive Medicine top 0.01%
- Hypothalamic control of reproductive hormones
- Ovarian function and disorders
Endocrine and Autonomic Systems top 0.05%
- Circadian rhythm and melatonin

Papers in

Agronomy and Crop Science 112
- Reproductive Physiology in Livestock 112
Reproductive Medicine 65
- Hypothalamic control of reproductive hormones 59
- Ovarian function and disorders 22

Co-authors: Sandra J. Legan (20 shared papers)Suzanne M. Moenter (18 shared papers)Douglas L. Foster (33 shared papers)Robert L. Goodman (19 shared papers)Jane E. Robinson (14 shared papers)Michael N. Lehman (15 shared papers)Eric L. Bittman (8 shared papers)A. REES MIDGLEY (3 shared papers)
Journals: Endocrinology (80 papers)Biology of Reproduction (44 papers)Reproduction (9 papers)Neuroendocrinology (6 papers)Journal of Endocrinology (3 papers)
Partner nations: United States France Australia

In The Last Decade

Fred J. Karsch

179 papers receiving 14.2k citations

Fred J. Karsch's Hit Papers

align trajectories log scale

Dynamics of gonadotropin-releasing hormone release during a pulse. 1992 · 1.2k citations

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if any of the following hold:

it has ≥500 total citations;
it reaches ≥1.5× the top-1% citation threshold for papers in the same subfield and year (the threshold is the minimum needed to enter the top 1%, not the average within it);
it reaches the top citation threshold in at least one of its specific research topics.

1992 Endocrinology
1984 Elsevier eBooks
1980 Endocrinology
1975 Endocrinology

Peers

Countries citing papers authored by Fred J. Karsch

Since Specialization

Citations

This map shows the geographic impact of Fred J. Karsch'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 Fred J. Karsch with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Fred J. Karsch more than expected).

Fields of papers citing papers by Fred J. Karsch

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Fred J. Karsch. 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 Fred J. Karsch. The network helps show where Fred J. Karsch may publish in the future.

Co-authors

The 25 scholars most cited alongside Fred J. Karsch, 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 Fred J. Karsch Line = papers co-authored together Fred J. Karsch 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 181 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Dynamics of gonadotropin-releasing hormone release during a pulse. Endocrinology ·Suzanne M. Moenter, Rhonda M. Brand, A. REES MIDGLEY, Fred J. Karsch Hit paper breakdown →	1992	1171
2	Neuroendocrine Basis of Seasonal Reproduction Elsevier eBooks ·Fred J. Karsch, Eric L. Bittman, Douglas L. Foster, Robert L. Goodman, Sandra J. Legan, Jane E. Robinson Hit paper breakdown →	1984	538
3	Role of Estrogen as Initiator of Daily LH Surges in the Ovariectomized Rat¹² Endocrinology ·Sandra J. Legan, Grace Coon, Fred J. Karsch Hit paper breakdown →	1975	506
4	Pulsatile Secretion of Luteinizing Hormone: Differential Suppression by Ovarian Steroids* Endocrinology ·Robert L. Goodman, Fred J. Karsch Hit paper breakdown →	1980	431
5	Pineal Melatonin Secretion Drives the Reproductive Response to Daylength in the Ewe* Endocrinology ·Eric L. Bittman, Robert J. Dempsey, Fred J. Karsch	1983	322
6	A Daily Signal for the LH Surge in the Rat Endocrinology ·Sandra J. Legan, Fred J. Karsch	1975	302
7	Pattern of Gonadotropin-Releasing Hormone (GnRH) Secretion Leading up to Ovulation in the Ewe: Existence of a Preovulatory GnRH Surge^* Endocrinology ·Suzanne M. Moenter, Alain Caraty, ALAIN LOCATELLI, Fred J. Karsch	1991	290
8	The Endocrine Control of Seasonal Reproductive Function in the Ewe: A Marked Change in Response to the Negative Feedback Action of Estradiol on Luteinizing Hormone Secretion¹² Endocrinology ·Sandra J. Legan, Fred J. Karsch, Douglas L. Foster	1977	285
9	The Estradiol-Induced Surge of Gonadotropin-Releasing Hormone in the Ewe* Endocrinology ·Suzanne M. Moenter, Alain Caraty, Fred J. Karsch	1990	279
10	Positive and Negative Feedback Control by Estrogen of Luteinizing Hormone Secretion in the Rhesus Monkey12 Endocrinology ·Fred J. Karsch, Donald J. Dierschke, Richard F. Weick, Taiki Yamaji, Julane Hotchkiss, E. Knobil	1973	274
11	A New Concept for Control of the Estrous Cycle of the Ewe Based on the Temporal Relationships Between Luteinizing Hormone, Estradiol and Progesterone in Peripheral Serum and Evidence that Progesterone Inhibits Tonic LH Secretion¹² Endocrinology ·Richard L. Hauger, Fred J. Karsch, Douglas L. Foster	1977	251
12	Do gonadotropin-releasing hormone, tyrosine hydroxylase-, and beta-endorphin-immunoreactive neurons contain estrogen receptors? A double-label immunocytochemical study in the Suffolk ewe. Endocrinology ·Michael N. Lehman, Fred J. Karsch	1993	228
13	Immunocytochemical localization of luteinizing hormone‐releasing hormone (LHRH) pathways in the sheep brain during anestrus and the mid‐luteal phase of the estrous cycle The Journal of Comparative Neurology ·Michael N. Lehman, Jane E. Robinson, Fred J. Karsch, Ann‐Judith Silverman	1986	222
14	Steroid Feedback Inhibition of Pulsatile Secretion of Gonadotropin-Releasing Hormone in the Ewe1 Biology of Reproduction ·Fred J. Karsch, J. T. Cummins, Gregory B. Thomas, Iain J. Clarke	1987	217
15	Evidence That the Mediobasal Hypothalamus Is the Primary Site of Action of Estradiol in Inducing the Preovulatory Gonadotropin Releasing Hormone Surge in the Ewe¹ Endocrinology ·A. Caraty, Claude Fabre‐Nys, Bernadette Delaleu, A. Locatelli, Gilles Bruneau, Fred J. Karsch, Allan E. Herbison	1998	180
16	Induced LH Surges in the Rhesus Monkey: Strength-Duration Characteristics of the Estrogen Stimulus12 Endocrinology ·Fred J. Karsch, Richard F. Weick, W.R. Butler, Donald J. Dierschke, L.C. Krey, G Weiss, Julane Hotchkiss, Taiki Yamaji, E. Knobil	1973	180
17	Sexual Differentiation of Pituitary Function: Apparent Difference between Primates and Rodents Science ·Fred J. Karsch, Donald J. Dierschke, E. Knobil	1973	169
18	Seasonal Changes in Gonadotropin-Releasing Hormone Secretion in the Ewe: Alteration in Response to the Negative Feedback Action of Estradiol1 Biology of Reproduction ·Fred J. Karsch, G.E. Dahl, N. P. Evans, Judy M. Manning, Kimberly P. Mayfield, Suzanne M. Moenter, Douglas L. Foster	1993	168
19	Importance of Estradiol and Progesterone in Regulating LH Secretion and Estrous Behavior During the Sheep Estrous Cycle1 Biology of Reproduction ·Fred J. Karsch, Sandra J. Legan, Kathleen Ryan, Douglas L. Foster	1980	155
20	Periovulatory Time Courses of Circulating Gonadotropic and Ovarian Hormones in the Rhesus Monkey1 Endocrinology ·Richard F. Weick, Donald J. Dierschke, Fred J. Karsch, W.R. Butler, Julane Hotchkiss, E. Knobil	1973	154

About Fred J. Karsch

Fred J. Karsch is a scholar working on Agronomy and Crop Science, Reproductive Medicine, Genetics, Endocrinology, Diabetes and Metabolism and Animal Science and Zoology, having authored 181 papers that have together received 15.1k indexed citations. Recurring topics across this work include Reproductive Physiology in Livestock (112 papers), Hypothalamic control of reproductive hormones (59 papers), Estrogen and related hormone effects (36 papers), Growth Hormone and Insulin-like Growth Factors (33 papers), Effects of Environmental Stressors on Livestock (25 papers), Stress Responses and Cortisol (23 papers), Ovarian function and disorders (22 papers) and Circadian rhythm and melatonin (22 papers). The work is most often cited by research in Reproductive Medicine (7.3k citations), Endocrine and Autonomic Systems (3.6k citations), Agronomy and Crop Science (5.2k citations), Behavioral Neuroscience (1.4k citations) and Animal Science and Zoology (1.5k citations). Fred J. Karsch has collaborated with scholars based in United States, France and Australia. Frequent co-authors include Sandra J. Legan, Suzanne M. Moenter, Douglas L. Foster, Robert L. Goodman, Jane E. Robinson, Michael N. Lehman, Eric L. Bittman, A. REES MIDGLEY, Rhonda M. Brand and Kellie M. Breen. Their work appears in journals such as Endocrinology, Biology of Reproduction, Reproduction, Neuroendocrinology and Journal of Endocrinology.

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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Fred J. Karsch

Fred J. Karsch's Hit Papers

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