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Supporting Your Horse's Immune System

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Rhodococcus equi Pneumonia: Rethinking Treatment to Fight Resistance
Skill, Science, and Sensitivity: Unpacking Horse Training Misconceptions
Rehabilitating the Neurologic EPM Horse
Building a Balanced Diet for Your Mare and Foal
Joint Health Matters: Top Therapies for a Successful Season
The Abscess Ruptured, But My Horse is Still Lame. Now What?
Understanding Horse Aggression
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Florida Mare Tests Positive for Strangles

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April 9, 2025

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March 20, 2025

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Hormones For Breeding

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Infographic: Understanding Progesterone in Mares

The Horse Staff October 8, 2024

Recognize the important role progesterone plays in breeding a mare and the resulting pregnancy. Sponsored by Sidekick Animal Health.

What Makes Some Stallion Semen Subpar?

Heather Smith Thomas June 14, 2024

Learn about 14 factors that can affect your stallion’s fertility.

Breeding Older Mares

Maureen Blaney Flietner December 14, 2023

Are you thinking about breeding an older mare? There are steps—some simple, some cutting-edge—breeders can take to obtain foals from mares with waning fertility.

Behavior Problems in Mares: Ovaries Aren't Always to Blame

Mares Behaving Badly: Is it Estrus or Something Else?

Heather Smith Thomas January 13, 2023

Find out if your mare’s frustrating antics are due to estrus, and learn about ways to keep them in check.

abortion in horses; determining equine fetal sex; Warm Winter Could Affect Tall Fescue Toxicosis in Broodmares

How Can I Tell if a Mare is Pregnant?

Ryan Ferris, DVM, MS, Dipl. ACT October 4, 2022

An equine reproduction specialist reviews signs that suggest a mare is in foal and how to find out definitively.

What’s New in Equine Estrous Manipulation

Christa Lesté-Lasserre, MA May 16, 2021

Changing your mare’s estrous cycle patterns can facilitate your breeding and performance plans. Learn about current options for owners who want to control their mares’ heat cycles.

detecting twins in horses; Infertility With No Cause? Try Hydrotubation of the Oviducts

New Hormone Therapy to Enhance Fertility in Mares

Alexandra Beckstett August 15, 2019

A researcher shares how using recombinant equine gonadotropins can support advanced reproductive technologies in horses.

Transitioning Breeding Mares From Anestrus to Estrus

Stacey Oke, DVM, MSc February 28, 2019

The transitional period between anestrus and estrus is officially complete once a mare has had her first heat of the year. Getting some mares to this point, however, and deciding when to breed them can be tricky.

horse Ovariectomy, standing Ovariectomy, removing mare ovaries, mare Ovariectomy

Can Equine Ovariectomies Be Justified on Behavioral Grounds?

Alexandra Beckstett March 16, 2018

While removing mares’ ovaries can be successful in remedying aggressive behavior, other estrous behaviors can persist even following surgery.

So, You Want to Breed Your Mare!

The Horse Staff January 12, 2017

Breeding a mare is exciting and not without challenges. Learn about stallion selection, breeding soundness, and more!

Thoroughbred mare and foal, foal exercise,

Sport Horse Reproduction: Challenges and Solutions

Etta Agan Bradecamp, DVM, Dipl. ACT, ABVP February 29, 2016

Equine reproduction specialist Dr. Etta Bradecamp overviews obstacles related to breeding performance mares and stallions.

Thinking Outside the Breeding Shed

Marian Carpenter June 17, 2015

Infertile mare? Deceased stallion? No problem! Equine reproduction is now high-tech enough to overcome these hurdles.

Pregnancy Failure in Horses: Why Things Go Wrong

Maureen Blaney Flietner April 16, 2015

Pregnancy failure in mares is a very real risk; here’s how to prevent or handle it.

Suppressing Estrus in Mares

Erica Larson November 29, 2012

Most options can lessen the effects of estrus while still allowing mares a second career as a broodmare.

Responsible Horse Breeders Council Formed

Mares and Hormones

Jeffrey Cook, DVM November 1, 2012

Estrous cycles and certain disease processes can affect mares’ reproductive hormones.

Hormone Therapy Might Prevent Equine Abortion

Marie Rosenthal, MS March 17, 2010

Veterinarians might be able to prevent abortions in some pregnant mares that show premature mammary development, Dietrich H. Volkmann, BVSc, MMedVet (Gyn), Dipl. ACT, told equine veterinarians at the 2010 Western Veterinary Conference, held Feb