Mare Articles About Equine Reproduction

– A selection of articles related to mare reproductive matters. Included are descriptors of evalutions, lab work, management and problems.

Please Note: While we believe the information found on these pages to be accurate and up to date at the time of writing, it is provided here for informational purposes only, and is not intended to take the place of your veterinarian.

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Abortion in the Mare - Some Pointers

Abortion in the Mare - Some Pointers

Late Term and Habitual Abortion in the Mare - Pregnancy loss in the mare is a constant source of concern among breeders. Here some common causes are discussed....
Anovulatory Hemorrhagic Follicles (AHF)

Anovulatory Hemorrhagic Follicles (AHF)

Persistent Anovulatory Follicles - Anovulatory Hemorrhagic Follicles, Luteinized Unruptured Follicles, PAFs, AHFs, LUFs - all follicular headaches in the mare!...
Artificial Insemination Method

Artificial Insemination Method

AI (Artificial Insemination) - Artificial Insemination of the Mare is not a difficult task to perform. Here we describe using an aseptic technique in detail....
Chromosome Translocation

Chromosome Translocation

Early Embryonic Loss and Genetics - Chromosomal translocations in horses may be a cause of early pregnancy loss or pregnancy failure. Dr. Teri Lear discusses the...
Cooled Transported Semen Breeding - Some Pointers

Cooled Transported Semen Breeding - Some Pointers

Breeding a Mare with Shipped Semen - Often perceived as going to be difficult, this can be a simple matter with some careful preparation, awareness and communication!...
Dealing with Retained Fetal Membranes (Placenta)

Dealing with Retained Fetal Membranes (Placenta)

Retained Fetal Membranes in the Mare - Post foaling retention of placenta and membranes. Noted reproductive vet Dr. Jon Pycock discusses at what point this becomes...
Dealing with the Older Maiden Mare Syndrome

Dealing with the Older Maiden Mare Syndrome

Breeding the Old Maiden Mare - Older maiden mares present problems of their own in achieving pregnancy. Noted reproductive expert Dr Jon Pycock explores some solutions....
Does My Mare Need Regumate?

Does My Mare Need Regumate?

Does My Mare Need RegumateTM ? By Jos Mottershead The Simple Answer: Does My Mare Need Regumate? Well, the short answer is that if you don't know, she probably...
Double Trouble - The Twin Dilemma

Double Trouble - The Twin Dilemma

Managing Twinning in the Mare - While most equine pregnancies are simple, twinning when it happens is an issue. Here we discuss managing twinning in the mare....

Early Cyclicity

Inducing Early Cyclicity in Mares - By Jos Mottershead (Originally Printed in: "The Reproduction Forum" in the CSHA Newsletter, 1996; updated 2006, 2015 &...
Early Embryonic Death (EED) - what it is and why it may happen

Early Embryonic Death (EED) - what it is and why it may happen

Early Embryonic Death - Noted reproductive veterinarian Dr. Jon Pycock explores early embryonic death in the mare and some possible resolutions to the problem....
Early Equine Embryology

Early Equine Embryology

Embryology - Different Stages of the Early Equine Pregnancy - Equine embryology - early pregnancy images. A pictorial showing embryonic developmental images...
Failure of Passive Transfer

Failure of Passive Transfer

Failure of Passive Transfer in Neonatal Foals - low IgG - can lead to potentially fatal complications, but is easily managed in most with testing and supplementation...
How and When to Delay Foal Heat

How and When to Delay Foal Heat

Why delay foal heat? - Tips and techniques about how and why to delay first post-partum estrus ("foal heat") in order to improve pregnancy rates in the mare....
How to Thaw Frozen Semen to Breed the Mare

How to Thaw Frozen Semen to Breed the Mare

Thawing Frozen Semen and Preparing it for Artificial Insemination. - Techniques and methods related to handling and thawing frozen semen prior to breeding a mare....
Identifying, Treating and Breeding the "Dirty" Mare

Identifying, Treating and Breeding the "Dirty" Mare

The Dirty Mare - Noted reproductive veterinarian Dr. Jon Pycock discusses techniques and methods related to successfully managing and breeding the dirty mare....
Is my mare Overdue? The Perennial Panic!

Is my mare Overdue? The Perennial Panic!

Is my mare overdue? - A question frequently asked by concerned owners and discussed here with possible answers and statistics related to gestational durations....
Mare Management with Cooled-Shipped or Frozen Semen

Mare Management with Cooled-Shipped or Frozen Semen

Protocols for Mare Management with Cooled-Shipped or Frozen Semen - methods to time breeding of mares both with and without use of pharmacological manipulation....
Most Common Ovarian Tumor

Most Common Ovarian Tumor

Granulosa Cell Tumor - Capable of affecting reproductive ability and overall disposition, the GCT is one of the most common ovarian tumors to be found in the mare....
Predicting Foaling in the Mare

Predicting Foaling in the Mare

Simple Methods for Predicting Foaling - A description of some of the most reliable and simple methods of predicting foaling - as well as less reliable techniques!...
Predicting Ovulation

Predicting Ovulation

Indications of Impending Ovulation in the Mare - Predicting ovulation in the mare can be a challenge with mares displaying different characteristics. Here we describe...
Progesterone and Estradiol ("P&E") Hormonal Manipulation

Progesterone and Estradiol ("P&E") Hormonal Manipulation

Progesterone and Estradiol - when it comes to hormonal manipulation, nithing beats P&E! In many cases it allows pinpointing of ovulation to the day in mares....
Silent Heat in the Mare - Causes and Resolutions

Silent Heat in the Mare - Causes and Resolutions

Managing "Silent Heat" in the Mare - Silent heat (estrus) in the mare can be annoying at best and disastrous to a breeding program at worst. This article offers...
Successful Breeding Takes More Than Chance

Successful Breeding Takes More Than Chance

Love me or love me not, but successful breeding takes more than chance - An older but updated article covering some of the more important items to consider for...
The Mare Reproductive Tract Dissected

The Mare Reproductive Tract Dissected

The Equine Uterus Dissected - Here we show the gross aspects of a mare reproductive tract dissected with labels and explanations. ...
The Oxytocin Protocol!

The Oxytocin Protocol!

Oxytocin use in the mare during breeding - Delayed Uterine Clearance and Breeding-Induced Endometritis problems can be helped by Oxytocin use when breeding! ...
Timed Insemination Breeding

Timed Insemination Breeding

Timed Insemination Protocol for Frozen Semen Use - Use of frozen semen in the mare may be "labour intensive", but timed insemination can really simplify things!...
Uterine Cytology Diagnostics in the Mare Explained

Uterine Cytology Diagnostics in the Mare Explained

Why Perform a Cytology Smear in Conjunction with a Uterine Culture? - The importance of uterine cytology evaluation supporting the culture results is explained....
Ventral Rupture in the Pregnant Mare

Ventral Rupture in the Pregnant Mare

Late Term Pregnancy Problems in the Mare - Ventral Rupture in the Mare - A late-term mare presents with ventral oedema and obvious discomfort. What is the diagnosis...
Warming Semen in the Field

Warming Semen in the Field

Constructing An Emergency Slide Warmer - Sometimes lab equipment may not be available, so one has to become inventive. An emergency slide warmer is one such piece...
When is an Embryo not an Embryo?

When is an Embryo not an Embryo?

Equine Pregnancy Terminology - Conceptus? Embryo? Fetus? Abortion? Stillbirth? Premature? So many terms - a little light offered here in so much confusion! ...
When Progestin Therapy Doesn't Work

When Progestin Therapy Doesn't Work

I gave my mare Progesterone (or Altrenogest), but it didn't work! - an explanation of some of the causes of failure of promotion of estrus and other problems....
When to Breed a Mare

When to Breed a Mare

When Should You Breed Your Mare? Winter, Spring, Summer, Fall: consider the options - Seasonality can play a part in choosing the right time of year for your...
Why Prostaglandin Fails in Mares

Why Prostaglandin Fails in Mares

I Gave My Mare Prostaglandin, But It Didn't Work! - Commonly it's used in the mare to cause her to enter estrus, sometimes she doesn't come back into heat - why?...
You're Ready to Breed Your Mare - But is the Semen OK?

You're Ready to Breed Your Mare - But is the Semen OK?

The Semen Looked Bad - Or Is It? Maybe not as bad as you think! A review of what constitutes a cooled semen dose, looking at some newer research and older dogma....