Richard Oko, Queen's University

Research

Assisted Reproductive Technologies Calcium Release Or Oscillations Egg Activation Fertilization Infertility/Fertility Intracytoplasmic Sperm Injection Pawp Perinuclear Theca

Latest papers

Prevalence and Morphological Appearance of Sperm Nuclear Defects Using Feulgen Reaction in Beef Bulls.
Reproduction in domestic animals = Zuchthygiene · 2025
Correction to: Standardization of the Assessment of Bovine Spermatozoal Abnormalities, in Relation to Fertility, as Part of the Bull Breeding Soundness Examination.
Advances in anatomy, embryology, and cell biology · 2025 · senior author
Standardization of the Assessment of Bovine Spermatozoal Abnormalities, in Relation to Fertility, as Part of the Bull Breeding Soundness Examination.
Advances in anatomy, embryology, and cell biology · 2025 · senior author

All 45 publications

Latest funding

The origin and compartmentalization of core somatic histones and GSTO2 in sperm and their role in fertilization
NSERC · 2017 · Principal investigator
$240,000
Flow Cytometry Cell Sorting Analysis Research Platform.
NSERC · 2015 · Co-investigator
$149,911
PAWP, a candidate sperm-borne oocyte-activating factor
CIHR · 2012 · Nominated PI
$690,481

All 9 grants and awards

45 publications.

01

Prevalence and Morphological Appearance of Sperm Nuclear Defects Using Feulgen Reaction in Beef Bulls.

Fernandes CE, Zart AL, Martins JCA, Oko R, Sutovsky P, Nogueira É

Reproduction in domestic animals = Zuchthygiene2025

DOI: 10.1111/rda.70021 PMID: 40028816

02

Correction to: Standardization of the Assessment of Bovine Spermatozoal Abnormalities, in Relation to Fertility, as Part of the Bull Breeding Soundness Examination.

Barth A, Perry VEA, Hamilton LE, Sutovsky P, Oko R

Advances in anatomy, embryology, and cell biology2025Senior author

DOI: 10.1007/978-3-031-70126-9_10 PMID: 41533148

03

Standardization of the Assessment of Bovine Spermatozoal Abnormalities, in Relation to Fertility, as Part of the Bull Breeding Soundness Examination.

Barth A, Perry VEA, Hamilton LE, Sutovsky P, Oko R

Advances in anatomy, embryology, and cell biology2025Senior author

DOI: 10.1007/978-3-031-70126-9_9 PMID: 40272594

04

Prenatal and Preweaning Environmental Effects upon Pubertal Development and Sperm Production.

Barth A, Perry VEA, Hamilton LE, Sutovsky P, Oko R

Advances in anatomy, embryology, and cell biology2025Senior author

DOI: 10.1007/978-3-031-70126-9_8 PMID: 40272593

05

Assessing Bovine Male Fertility in a Technological Age.

Barth A, Perry VEA, Hamilton LE, Sutovsky P, Oko R

Advances in anatomy, embryology, and cell biology2025Senior author

DOI: 10.1007/978-3-031-70126-9_7 PMID: 40272592

06

Mechanisms of Development of Sperm Defects.

Barth A, Perry VEA, Hamilton LE, Sutovsky P, Oko R

Advances in anatomy, embryology, and cell biology2025Senior author

DOI: 10.1007/978-3-031-70126-9_6 PMID: 40272591

07

Bull Sperm Abnormalities in Practice.

Barth A, Perry VEA, Hamilton LE, Sutovsky P, Oko R

Advances in anatomy, embryology, and cell biology2025Senior author

DOI: 10.1007/978-3-031-70126-9_5 PMID: 40272590

08

Photomicrographic Glossary of the Features of Bovine Sperm Cell Abnormalities.

Barth A, Perry VEA, Hamilton LE, Sutovsky P, Oko R

Advances in anatomy, embryology, and cell biology2025Senior author

DOI: 10.1007/978-3-031-70126-9_4 PMID: 40272589

09

Bovine Sperm Maturation.

Barth A, Perry VEA, Hamilton LE, Sutovsky P, Oko R

Advances in anatomy, embryology, and cell biology2025Senior author

DOI: 10.1007/978-3-031-70126-9_3 PMID: 40272588

10

Bovine Spermatogenesis.

Barth A, Perry VEA, Hamilton LE, Sutovsky P, Oko R

Advances in anatomy, embryology, and cell biology2025Senior author

DOI: 10.1007/978-3-031-70126-9_2 PMID: 40272587

The origin and compartmentalization of core somatic histones and GSTO2 in sperm and their role in fertilization

Principal investigatorNSERC2017Discovery Grants Program - Individual

Principal investigators: Oko, Richard

$240,000

Flow Cytometry Cell Sorting Analysis Research Platform.

Co-investigatorNSERC2015Research Tools and Instruments - Category 1 (<$150,000)

Principal investigators: Basta, Sameh

$149,911

PAWP, a candidate sperm-borne oocyte-activating factor

Nominated PICIHR2012Operating Grant

Principal investigators: Oko, Richard J

Keywords: Assisted Reproductive Technologies; Calcium Release Or Oscillations; Egg Activation; Fertilization; Infertility/Fertility; Intracytoplasmic Sperm Injection; Pawp; Perinuclear Theca; Signal Transduction; Sperm-Borne Oocyte Activating Factor

$690,481

The role of sperm inner acrosomal membrane proteins in acrosomal biogenesis and fertilization

Principal investigatorNSERC2012Discovery Grants Program - Individual

Principal investigators: Oko, Richard

$200,000

Sperm inner acrosomal membrane proteins: their ontogeny and role in fertilization

Principal investigatorNSERC2007Discovery Grants Program - Individual

Principal investigators: Oko, Richard

$185,000

Realtime PCR facility

Co-investigatorNSERC2005Research Tools and Instruments - Category 1 (<$150,000)

Principal investigators: Croy, Anne

$58,663

Characterization of sperm inner acrosomal membrane proteins

Principal investigatorNSERC2002Discovery Grants Program - Individual

Principal investigators: Oko, Richard

$175,000

Identification and characterization of membrane associated proteins involved in sperm maturation and fertilization

Principal investigatorNSERC1998Discovery Grants Program - Individual

Principal investigators: Oko, Richard

$123,255

Cellular and molecular characterization of perinuclear theca proteins of mammalian spermatozoa

Principal investigatorNSERC1994Discovery Grants Program - Individual

Principal investigators: Oko, Richard

$60,000

From CIHR, NSERC and SSHRC funding decisions: CIHR since 2008, NSERC since 1991 and SSHRC since 1998, including their latest published competition results.

Frequent collaborators

Urology
Biochemistry, Microbiology and Immunology
Other

Co-authors at Queen's University, colored by department. Thicker lines mean more shared papers; select anyone to open their profile and their own map.

Cristian O'Flaherty

Urology

2 shared papers, latest 2023

Nongnuj Tanphaichitr

Biochemistry, Microbiology and Immunology

1 shared papers, latest 2018

Write to this professor

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Applying for

Paper to mention

Subject: Prospective PhD student: Assisted Reproductive Technologies Dear Professor Oko, My name is [your name], and I am a [your current degree or role] at [your institution]. I am applying for a PhD position starting in [term and year]. I read your paper "Prevalence and Morphological Appearance of Sperm Nuclear Defects Using Feulgen Reaction in Beef Bulls." (2025), and it connects closely to my own work on [your research topic]. [One or two sentences on what you did and what you learned.] Are you accepting new PhD students for [term and year]? I have attached my CV and transcripts, and I would be glad to talk at a time that suits you. Thank you for your time. Kind regards, [your name]