TL;DR - A horse breeding service (covering or AI) is the act of fertilizing a mare with a stallion, either by natural cover or artificial insemination (AI). The optimal window is April–July (peak heat cycle and best photoperiod for the future foal). Stud fees range from €600–€2,500 for a standard stallion to €10,000+ for a top international sire. Success depends on veterinary monitoring (ultrasounds, heat detection) and on choosing a stallion that complements the mare morphologically, genetically and on the health front.
Sommaire
- Definition
- When to breed a mare
- How a service works
- Natural cover vs artificial insemination
- How to choose a stallion
- Stud fees and total budget
- Veterinary monitoring
- Breeding at Écurie de Livhest
- FAQ
Definition
A breeding service is the act of fertilizing a mare with a stallion in order to produce a foal. It can be performed by natural cover (the stallion physically mounts the mare) or by artificial insemination (AI).
There are several methods:
- In-hand cover - the stallion covers the mare under handler control
- Pasture breeding - stallion and mare turned out together (rare in modern breeding)
- Fresh AI - semen collected and inseminated immediately
- Cooled-shipped AI - semen transported within 24–48 h
- Frozen AI - semen stored long-term and thawed at insemination time
When to breed a mare
The mare is a long-day breeder: her cycles activate as daylight increases. The natural breeding season runs from April to September, peaking in May–June.
| Period | Action |
|---|---|
| Jan–Feb | Vet check, lighting program if needed to advance heats |
| Mar | First natural heats, ultrasound of reproductive tract |
| Apr–Jun | Targeted services - best success rate |
| Jul–Aug | Late services possible (later foal next year) |
| Sep | End of season |
Why not winter? A mare that conceives in March will foal 11 months later - around February. A late-winter / early-spring foal has the entire summer to grow at pasture in ideal conditions.
Mare cycle: heats every 21 days (from March), with a fertile window of 5–7 days. Ovulation occurs near the end of heat.
How a service works
Steps to a successful service:
- Mare preparation - vet check, ultrasound, deworming, vaccinations
- Heat detection - behavioral observation (receptive mare, frequent urination, vulvar winking) or teasing with a “teaser” stallion
- Ultrasound monitoring - follicular growth, ovulation predicted within 24–48 h
- Service or AI - at the optimal window to maximize sperm/egg meeting
- Pregnancy diagnosis - ultrasound at 14–16 days, then re-check at 25 and 45 days
- Gestation - about 11 months (320–340 days), then foaling
Service does not guarantee pregnancy. Success rate per cycle: 50–70 % natural cover, 45–60 % fresh AI, 30–45 % frozen AI. Several attempts may be needed.
Natural cover vs artificial insemination
Natural cover:
- ✅ Slightly higher conception rate on average
- ✅ No specialized equipment
- ✅ Mare’s behavioral comfort
- ❌ Sanitary risk (pathogen transmission)
- ❌ Risk of injury to stallion or mare
- ❌ Mare must be physically with the stallion
Artificial insemination (AI):
- ✅ No mare transport (with shipped semen)
- ✅ Sanitary and physical safety
- ✅ Access to overseas or deceased stallions (frozen semen)
- ✅ Multiple mares per ejaculate
- ❌ Requires precise ultrasound timing
- ❌ Additional cost (collection, shipping, vet fees)
- ❌ Slightly lower rate with frozen semen
Our recommendation: for most breeders, fresh or cooled-shipped AI offers the best safety/success compromise. Natural cover remains relevant for difficult mares or breeders who prefer simplicity.
How to choose a stallion
A good stallion for your mare is one that:
- Complements her qualities - more refinement for a heavy mare, more substance for a light one
- Corrects her flaws - without introducing new ones
- Adds genetic value - competition record, proven offspring, established lines
- Is healthy - tested negative for hereditary diseases (in Arabians: CA, SCID, LFS, OAAM)
- Has compatible breeding logistics - cooled-shipped AI to your vet, or transport to the stallion
Mistakes to avoid:
- Choosing solely on looks without morphological compatibility
- Ignoring inbreeding in the pedigree (Wright coefficient)
- Skipping genetic testing - a SCID-affected foal dies in its first months
- Going cheapest without verifying record and offspring
Stud fees and total budget
| Stallion tier | Range |
|---|---|
| Standard (saddle, leisure) | €500 – €1,500 |
| Confirmed (regional record) | €1,500 – €3,500 |
| Top sire (international record) | €3,500 – €10,000 |
| Elite show stallion (world champion) | €10,000 to €50,000+ |
Additional costs:
- Mare ultrasounds: €30–€50 each, 3–6 per cycle
- Mare preparation: vet check, swabs (€200–€400)
- Semen shipping (AI): €80–€200 per shipment
- Mare boarding at stallion site (natural cover): €250–€500/month
- Pregnancy diagnoses (D14, D25, D45): €90–€150 total
Realistic full budget for cooled-shipped AI, mare at home: plan €1,500–€4,000 all-in for a quality standard stallion, with a 70–80 % chance of pregnancy over the season.
Veterinary monitoring
Before service:
- Gynecological exam
- Uterus and ovary ultrasound
- Endometrial swab, biopsy if mare is over 12
- Vaccinations updated (rhinopneumonitis, flu, tetanus)
- Up-to-date deworming
During service:
- Heat-cycle ultrasounds
- Semen deposit at the optimal moment
- Post-AI ultrasound if needed
After service:
- Pregnancy diagnosis at D14–16
- Confirmation at D25 (heartbeat)
- Confirmation at D45
- Gestation-specific vaccinations (rhinopneumonitis at months 5, 7, 9)
Breeding at Écurie de Livhest
The Écurie de Livhest offers its Arabian purebred stallions for the breeding season. All our stallions:
- Verifiable pedigrees - AFCPSA papers
- Negative genetic tests - CA, SCID, LFS, OAAM
- Service via cooled-shipped AI - semen sent to your vet
- In-hand cover possible - on request, mare boarded with us
Discover our stallions available for service - Sultan AA, Julius di Mar, Avalon Crazy - three stallions selected exclusively for breeding.
Our breeding service - veterinary protocol, heat-cycle monitoring, cooled-shipped AI.
Horses for sale - if you’re looking to purchase a horse rather than breed your mare.
Request a breeding contract - we’ll send the stud agreement, detailed fees and veterinary protocol.
Going further: our complete Arabian horse guide - origins, characteristics, lineage selection.
FAQ
What is a horse breeding service?
A breeding service is the fertilization of a mare by a stallion, by natural cover or artificial insemination. It is the initial act that, after 11 months of gestation, leads to the foal’s birth.
How do you breed a mare?
In 5 steps: veterinary preparation (check, ultrasound, vaccinations), heat detection, choice of compatible stallion, service at the optimal ovulation window (usually cooled-shipped AI today), pregnancy diagnosis at 14–16 days.
When is the best time to breed a mare?
April to July is ideal. The mare being a long-day breeder, her natural heats start in March–April. A service in this window gives a foal born the following spring, in optimal growing conditions.
How much does a horse breeding service cost?
Stud fees range from €500 for a standard stallion to over €10,000 for a top sire. Adding veterinary follow-up, ultrasounds and semen shipping, plan a total budget of €1,500–€4,000 for a cooled-shipped AI with a quality stallion.
What is the difference between a stallion and a horse?
All stallions are intact (uncastrated) male horses used for breeding. A male horse not used for breeding is usually castrated and called a gelding. A female horse is a mare.