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List of works by Ralf Henkel

A Novel Approach to Improving the Reliability of Manual Semen Analysis: A Paradigm Shift in the Workup of Infertile Men

scientific article published on 19 November 2019

A Schematic Overview of the Current Status of Male Infertility Practice

scientific article published on 12 July 2019

A scientometric analysis of research publications on male infertility and assisted reproductive technology

scientific article published on 24 November 2020

A simple point of care test can indicate the need for periodontal therapy to reduce the risk for adverse pregnancy outcomes in mothers attending antenatal clinics.

scientific article published on 31 May 2017

Accurate sperm morphology assessment predicts sperm function

scientific article published on 01 November 2011

Acrosin activity of human spermatozoa by means of a simple gelatinolytic technique: a method useful for IVF

scientific article published on 01 May 1995

Adhesion molecules and matrix proteins on human spermatozoa

scientific article published in August 1998

Advancement in biochemical assays in andrology.

scientific article

Age-related changes in seminal polymorphonuclear elastase in men with asymptomatic inflammation of the genital tract

scientific article

An In-Depth Bibliometric Analysis and Current Perspective on Male infertility Research

scientific article published on 20 February 2019

An Update on Oxidative Damage to Spermatozoa and Oocytes

scientific article

An update on the techniques used to measure oxidative stress in seminal plasma

scientific article published on 19 August 2020

Aqueous leaf extract of Moringa oleifera reduced intracellular ROS production, DNA fragmentation and acrosome reaction in Human spermatozoa in vitro

scientific article published on 22 November 2020

Association between promoter methylation of MLH1 and MSH2 and reactive oxygen species in oligozoospermic men-A pilot study

scientific article

Association of XRCC1 and ERCC2 promoters' methylation with chromatin condensation and sperm DNA fragmentation in idiopathic oligoasthenoteratozoospermic men

scientific article published on 23 December 2020

Automation of human semen analysis using a novel artificial intelligence optical microscopic technology

scientific article published on 04 October 2019

Bibliometrics: tracking research impact by selecting the appropriate metrics

scientific article

Biochemical and immunological characterization of the acrosome reaction-inducing substance (ARIS) of hFF

scientific article published on 01 February 1994

Calibration of redox potential in sperm wash media and evaluation of oxidation-reduction potential values in various assisted reproductive technology culture media using MiOXSYS system

scientific article published on 3 January 2018

Carica papaya seed extract slows human sperm

scientific article published on 23 May 2019

Causes and consequences of sperm mitochondrial dysfunction

scientific article published on 08 June 2020

Chronic pelvic pain syndrome/chronic prostatitis affect the acrosome reaction in human spermatozoa

scientific article published on 11 January 2006

Clinical utility of sperm DNA fragmentation testing: a commentary.

scientific article published on September 2017

Comparative analysis of tests used to assess sperm chromatin integrity and DNA fragmentation

scientific article published on 06 July 2020

Comparison between swim-up and glass wool column filtration of human semen in a gamete intrafallopian transfer program.

scientific article published in March 1996

Comparison of three staining methods for the morphological evaluation of human spermatozoa

scientific article published on 28 June 2007

Comprehensive Analysis of Global Research on Human Varicocele: A Scientometric Approach

scientific article published in 2022

Correlation of oxidation-reduction potential with hormones, semen parameters and testicular volume

scientific article published on 26 February 2019

Critical evaluation of two models of flow cytometers for the assessment of sperm DNA fragmentation: an appeal for performance verification

scientific article published on 01 September 2019

Cumene hydroperoxide induced changes in oxidation-reduction potential in fresh and frozen seminal ejaculates.

scientific article published on 15 March 2017

DNA fragmentation of spermatozoa and assisted reproduction technology

scientific article published in October 2003

Defining bioassay conditions to evaluate sperm/zona interaction: inhibition of zona binding mediated by solubilized human zona pellucida

scientific article published in April 1996

Determination of seminal oxidation-reduction potential (ORP) as an easy and cost-effective clinical marker of male infertility.

scientific article

Determination of the acrosome reaction in human spermatozoa is predictive of fertilization in vitro

scientific article published on 01 December 1993

Diagnostic value of advanced semen analysis in evaluation of male infertility

scientific article published on 26 May 2020

Diagnostic value of routine semen analysis in clinical andrology

scientific article published on 12 May 2020

Different cumulative pregnancy rates in patients with repeated IVF- or ICSI cycles: possible influence of a male factor

scientific article published in May 1999

Differentiation of ejaculates showing reactive oxygen species production by spermatozoa or leukocytes

scientific article published on 01 November 1997

Eduardo Bustos-Obregón (1937-2014).

scientific article published in February 2015

Effect of Cissampelos capensis rhizome extract on human spermatozoa in vitro.

scientific article published on 16 March 2014

Effect of Typha capensis (Rohrb.)N.E.Br. rhizome extract F1 fraction on cell viability, apoptosis induction and testosterone production in TM3-Leydig cells

scientific article

Effect of angiotensin converting enzyme (ACE) and angiotensins on human sperm functions

scientific article published in August 1998

Effect of reactive oxygen species produced by spermatozoa and leukocytes on sperm functions in non-leukocytospermic patients

scientific article published on 01 March 2005

Effects of temperature and storage time on the motility, viability, DNA integrity and apoptosis of processed human spermatozoa

scientific article published on 09 December 2019

Efficacy of Antioxidant Supplementation on Conventional and Advanced Sperm Function Tests in Patients with Idiopathic Male Infertility

scientific article published on 06 March 2020

Environmental contaminants and male infertility: Effects and mechanisms

scientific article published on 24 May 2020

Epididymal contribution to male infertility: An overlooked problem

scientific article published on 20 August 2020

Estimate of oxygen consumption and intracellular zinc concentration of human spermatozoa in relation to motility.

scientific article published in March 2003

Etiologies of sperm DNA damage and its impact on male infertility

scientific article published on 19 June 2020

Evaluation of reference values of standard semen parameters in fertile Egyptian men.

scientific article published on 15 January 2018

Evaluation of seminal Oxidation-Reduction potential in male infertility

scientific article published on 12 May 2020

Evaluation of uridine metabolism in human and animal spermatozoa

scientific article published on 01 January 2006

Further indications of the multicomponent nature of the acrosome reaction-inducing substance of human follicular fluid

scientific article published on 01 September 1995

Geographical differences in semen characteristics: Comparing semen parameters of infertile men of the United States and Iraq

scientific article published on 31 January 2020

Glass wool filtration reduces reactive oxygen species by elimination of leukocytes in oligozoospermic patients with leukocytospermia

scientific article published on 01 July 1996

Globozoospermia syndrome: An update

scientific article published on 14 November 2019

High levels of oxidation-reduction potential in frozen-thawed human semen are significantly correlated with poor post-thaw sperm quality

scientific article published on 30 April 2020

Highly Cited Articles in the Field of Male Infertility and Antioxidants: A Scientometric Analysis

scientific article published in 2021

Home sperm testing device versus laboratory sperm quality analyzer: comparison of motile sperm concentration

scientific article published on 10 November 2018

Human sperm handling in intracytoplasmic sperm injection processes: In vitro studies on mouse oocyte activation, embryo development competence and sperm oxidation-reduction potential

scientific article published on 9 January 2018

Immunoelectron Microscopic Studies on Outer Dense Fibres ⬇️

scientific article published on 01 January 1997

Improvements in Sperm Motility Following Low- or High-Intensity Dietary Interventions in Men With Obesity

scientific article published on 18 January 2024

In vivo effects of Eurycoma longifolia Jack (Tongkat Ali) extract on reproductive functions in the rat.

scientific article published on 6 March 2013

Indirect immunofluorescence using monoclonal antibodies for the detection of leukocytospermia: comparison with peroxidase staining.

scientific article published in April 2002

Induction of acrosome reaction by low temperature is comparable to physiological induction by human follicular fluid

scientific article published on 01 May 1998

Influence of elevated pH levels on structural and functional characteristics of the human zona pellucida: functional morphological aspects

scientific article published in October 1995

Influence of macrophage migration inhibitory factor (MIF) on the zinc content and redox state of protein-bound sulphydryl groups in rat sperm: indications for a new role of MIF in sperm maturation

scientific journal article

Interpretation of semen analysis using WHO 1999 and WHO 2010 reference values: Abnormal becoming normal.

scientific article

Is there plagiarism in the most influential publications in the field of andrology?

scientific article published on 06 September 2019

Leucocytes and intrinsic ROS production may be factors compromising sperm chromatin condensation status

scientific article published on 01 April 2010

Leukocytes and oxidative stress: dilemma for sperm function and male fertility

scientific article

Limitations for ICSI, MESA, TESE? - experiences from the IVF centre in Giessen

scientific article published on 01 June 2003

Low expression of adhesion molecules and matrix proteins in patients showing poor penetration in zona-free hamster oocytes

scientific article published in May 1996

Male Fertility and the COVID-19 Pandemic: Systematic Review of the Literature

scientific article published on 14 August 2020

Male Oxidative Stress Infertility (MOSI): Proposed Terminology and Clinical Practice Guidelines for Management of Idiopathic Male Infertility

scientific article published on 28 May 2019

Metabolic syndrome is associated with increased seminal inflammatory cytokines and reproductive dysfunction in a case-controlled male cohort.

scientific article published on 23 June 2016

Microtubular Dysfunction and Male Infertility

article

Molecular aspects of declining sperm motility in older men.

scientific article published in November 2005

Novel additive for sperm cryopreservation media: Holotheria parva coelomic cavity extract protects human spermatozoa against oxidative stress-A pilot study

scientific article published on 23 April 2020

Obesity and male infertility: Mechanisms and management

scientific article published on 12 May 2020

Obesity and metabolic syndrome associated with systemic inflammation and the impact on the male reproductive system

scientific article published on 29 August 2019

Obesity is associated with increased seminal insulin and leptin alongside reduced fertility parameters in a controlled male cohort

scientific article

Oleanolic acid causes reversible contraception in male mice by increasing the permeability of the germinal epithelium

scientific article published on 01 September 2019

Outer dense fibres of human spermatozoa: partial characterization and possible physiological functions

scientific article published on 01 April 1994

Phytoandrogenic properties of Eurycoma longifolia as natural alternative to testosterone replacement therapy

scientific article published on 06 January 2014

Poor development of outer dense fibers as a major cause of tail abnormalities in the spermatozoa of asthenoteratozoospermic men

scientific article published on 01 November 1991

Predictive value of oxidative stress testing in semen for sperm DNA fragmentation assessed by sperm chromatin dispersion test

scientific article published on 11 December 2019

Production and characterization of monoclonal antibodies to the major protein of boar outer dense fibers

scientific article published on 01 October 1998

Promoter methylation analysis of CDH1 and p14ARF genes in patients with urothelial bladder cancer

scientific article published on 19 July 2018

Protective effects of saffron against zearalenone-induced alterations in reproductive hormones in female mice (Mus musculus)

scientific article published on 30 November 2018

Protein profiling in unlocking the basis of varicocele-associated infertility

scientific article published on 26 May 2020

Proteomics and metabolomics - Current and future perspectives in clinical andrology

scientific article published on 29 June 2020

Putative role of a serpin in modulation of acrosome reaction

scientific article published on 01 January 1997

Quest for the best-A move to Anatomical Endoscopic Enucleation of the Prostate

scientific article published on 01 September 2020

Radiations and male fertility

scientific article published on 09 December 2018

Reactive oxygen species and male reproductive hormones

scientific article published on 11 September 2018

Reactive oxygen species impact on sperm DNA and its role in male infertility.

scientific article published on 11 April 2018

Reactive oxygen species in male reproduction: A boon or a bane?

scientific article published on 09 April 2020

Redox regulation of fertility in aging male and the role of antioxidants: A savior or stressor

scientific article

Relationship between human sperm morphology and acrosomal function

scientific article

Relevance of zinc in human sperm flagella and its relation to motility

scientific article published in June 1999

Resorption of the element zinc from spermatozoa by the epididymal epithelium

scientific article published on 01 April 2003

Ritalinic Acid Stimulates Human Sperm Motility and Maintains Vitality In Vitro

scientific article published on 08 May 2019

Role of Withania somnifera (Ashwagandha) in the management of male infertility

scientific article published on 7 December 2017

Role of oxidative stress, infection and inflammation in male infertility

scientific article published on 01 December 2018

SNP's in xenobiotic metabolism and male infertility

scientific article published on 29 May 2019

Scavenging effect of N-acetyl-L-cysteine against reactive oxygen species in human semen: a possible therapeutic modality for male factor infertility?

scientific article published on 01 May 1997

Seasonal changes in human sperm chromatin condensation

scientific article

Seasonal changes of neutral alpha-glucosidase activity in human semen

scientific article published in January 2006

Selective capacity of glass-wool filtration for the separation of human spermatozoa with condensed chromatin: a possible therapeutic modality for male-factor cases?

scientific article published in September 1994

Semen culture and the assessment of genitourinary tract infections.

scientific article

Seminal oxidation-reduction potential levels are not influenced by the presence of leucocytospermia

scientific article published on 12 May 2020

Semiquantitative promoter methylation of MLH1 and MSH2 genes and their impact on sperm DNA fragmentation and chromatin condensation in infertile men

scientific article published on 28 October 2020

Sequential analysis of sperm functional aspects involved in fertilisation: a pilot study

scientific article published on 06 July 2011

Smoking-induced genetic and epigenetic alterations in infertile men

scientific article published on 22 August 2018

Sperm DNA Fragmentation: A New Guideline for Clinicians

scientific article published on 06 August 2020

Sperm cell biology: current perspectives and future prospects.

scientific article published on January 2011

Sperm cryopreservation: A review on current molecular cryobiology and advanced approaches

scientific article published on 22 August 2018

Sperm function and assisted reproduction technology.

scientific article published on 7 March 2005

Sperm preparation for ART ⬇️

scientific article published on November 14, 2003

Sperm preparation: state-of-the-art--physiological aspects and application of advanced sperm preparation methods.

scientific article published on 05 December 2011

Sperm separation in patients with urogenital infections

scientific article published on 01 January 1998

Standardised water-soluble extract of Eurycoma longifolia, Tongkat ali, as testosterone booster for managing men with late-onset hypogonadism?

scientific article published on 15 June 2011

Standards in semen examination: publishing reproducible and reliable data based on high-quality methodology

scientific article published in 2022

TUNEL assay and SCSA determine different aspects of sperm DNA damage

scientific article published in October 2010

TUNEL assay-Standardized method for testing sperm DNA fragmentation

scientific article published on 24 July 2020

TUNEL assay: Establishing a sperm DNA fragmentation cut-off value for Egyptian infertile men

scientific article published on 26 July 2019

The excessive use of antioxidant therapy: A possible cause of male infertility?

scientific article published on 26 September 2018

The impact of male overweight on semen quality and outcome of assisted reproduction

scientific article

The impact of oxidants on sperm function

scientific article published on 01 December 2005

The in vitro modulation of steroidogenesis by inflammatory cytokines and insulin in TM3 Leydig cells.

scientific article published on 22 March 2018

The monoclonal antibody GZS-1 detects a maturation-associated antigen of human spermatozoa that is also present on the surface of human mononuclear blood cells

scientific article published on 01 May 1996

The role of infections and leukocytes in male infertility

scientific article published on 21 July 2020

Tongkat Ali as a potential herbal supplement for physically active male and female seniors--a pilot study

scientific article published on 11 June 2013

Total antioxidant capacity-Relevance, methods and clinical implications

scientific article published on 12 May 2020

Tracking research trends and hotspots in sperm DNA fragmentation testing for the evaluation of male infertility: a scientometric analysis

scientific article published on 26 December 2019

Ultrastructure, protein synthesis and secretion of day-6 rabbit blastocysts cultured in a chemically defined, protein-free medium

scientific article published on 01 January 1990

Zona pellucida as physiological trigger for the induction of acrosome reaction

scientific article published on 01 August 1998

[Variability determination in chromatin condensation and seminal alpha glucosidase with relation with the spermiogram]

scientific article published on 01 May 2000

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