Labrador Retriever Breed Overview
The Labrador Retriever has held the position of most-registered breed in the United States for decades. Their temperament, trainability, and versatility as family companions, service dogs, and hunting partners create consistent demand that spans all segments of the dog market.
An important distinction exists between field-type and show-type Labradors. Field Labs tend to be leaner, taller, and more energetically driven, while show Labs are stockier with broader heads and heavier bone. These differences can influence pregnancy progression, puppy birth weights, and growth patterns — breeders should track their own lines rather than relying on generic breed averages.
Despite their overall robustness, Labradors carry risk for several hereditary conditions that require screening before breeding. The breed's popularity means that cutting corners on health testing has an outsized impact on the overall breed population.
Breeding Considerations
The Labrador Retriever Club recommends a comprehensive set of health clearances before breeding. Beyond the standard orthopedic and eye evaluations, Labradors have breed-specific DNA tests that are critical for responsible breeding programs.
- OFA hips and elbows (minimum age 24 months)
- CAER eye exam (annual) — PRA screening
- EIC (Exercise Induced Collapse) DNA test
- CNM (Centronuclear Myopathy) DNA test
- Cardiac evaluation
- D-locus testing if breeding dilute colors (silver, charcoal)
EIC is particularly important because affected dogs appear completely normal until subjected to intense exercise or excitement, at which point they can collapse. CNM causes progressive muscle weakness in young puppies. Both are autosomal recessive — carriers are healthy but should only be bred to clear-tested partners.
Females are typically bred no earlier than two years of age, after all health clearances are finalized. Experienced breeders also evaluate temperament and structure before making pairing decisions.
Labrador Retriever Pregnancy Overview
Labrador pregnancies average sixty-three days from ovulation. Progesterone testing during the breeding period significantly improves due date accuracy. Labs are generally straightforward during pregnancy, maintaining good appetite and activity through most of gestation.
Key fact
Labrador Retriever Gestation Length
63 days from ovulation is average, but healthy deliveries from day 58–68 are well-documented.
Litter sizes typically range from six to ten puppies. Show-type Labs sometimes produce slightly larger litters than field-type, though individual variation is significant. First litters tend to be smaller regardless of type.
Labradors are generally free-whelping with low C-section rates. Their broad pelvis and well-proportioned puppy size contribute to uncomplicated deliveries in most cases. However, very large litters can lead to uterine inertia, and breeders should maintain a veterinary emergency plan.
- Average gestation: 63 days from ovulation
- Typical litter size: 6–10 puppies
- Generally free-whelp with low complication rates
- Weight gain may be less visible in show-type dams until later weeks
- Appetite typically remains strong throughout pregnancy
Newborn Labrador Retriever Puppy Care
Labrador puppies are typically robust at birth, weighing between 400 and 500 grams (14–18 oz). They are generally vigorous nursers with strong latch instincts, though individual variation within litters is normal.
Typical Birth Weight
Labrador puppies are generally robust — field-type pups may be slightly lighter than show-type at birth
Reference
Typical Birth Weights by Breed Size
Ranges are approximate. Individual litter variation is wide — trends matter more than targets.
Healthy Labrador puppies should double their birth weight by seven to ten days. Daily weighing is the most reliable early warning system for identifying puppies that need supplemental support. In large litters, rotating nursing access ensures all puppies receive adequate colostrum.
Labs grow quickly and gain weight steadily. The Animal Weight Tracker helps breeders log daily weights for each puppy, visualize growth curves across the litter, and catch any individual falling behind the overall trend.
Labrador Retriever Growth Expectations
Labradors grow rapidly in the first six months, then continue filling out through twelve to eighteen months. Field-type Labs tend to be lighter overall, while show-type Labs may be heavier at every stage. The ranges below cover both types.
| Age | Male (lbs) | Female (lbs) |
|---|---|---|
| 2 weeks | 1.5–3 | 1.5–2.5 |
| 4 weeks | 3–5 | 2.5–4.5 |
| 8 weeks | 8–12 | 7–11 |
| 12 weeks | 15–22 | 14–20 |
| 6 months | 40–55 | 35–45 |
| 12 months | 60–75 | 50–65 |
These are approximate ranges. Track your individual puppies rather than comparing strictly to population averages.
Health Issues Relevant to Breeding
- Hip and elbow dysplasia — Common in the breed. OFA or PennHIP evaluation before breeding is standard practice.
- Exercise Induced Collapse (EIC) — Autosomal recessive. Affected dogs collapse during intense activity. DNA testing is essential.
- Centronuclear Myopathy (CNM) — Causes progressive muscle wasting in puppies. DNA testing prevents affected litters.
- Progressive Retinal Atrophy (PRA) — Causes progressive vision loss. Both CAER exams and DNA testing are recommended.
- Obesity tendency — Labs are genetically predisposed to weight gain. This affects pregnancy management, whelping ease, and long-term puppy buyer education.
- Bloat/GDV — Deep-chested breeds carry elevated risk. While not directly a breeding test, awareness influences post-whelping dam care.
For a complete overview, see our Health Testing Before Breeding guide.
Whelping preparation
Have these ready well before your Labrador's due window.
Digital Gram Scale
Accurate gram-level weighing for daily newborn puppy monitoring.
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Complete Whelping Kit
Everything you need ready before the whelping window opens.
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Esbilac Puppy Milk Replacer
Trusted milk replacer for newborns needing supplemental feeding.
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Frequently Asked Questions About Labrador Breeding
What is the difference between field and show Labradors for breeding?
Field Labs are leaner and more driven; show Labs are stockier with heavier bone. Both types need the same health clearances, but growth patterns and litter characteristics can differ.
What is EIC and why does it matter?
Exercise Induced Collapse is an autosomal recessive condition where affected dogs collapse during intense activity. DNA testing ensures carriers are only bred to clear partners.
How many puppies do Labs typically have?
Six to ten is typical. First litters are often smaller, and very large litters of twelve or more are not uncommon.
Do Labrador Retrievers need C-sections?
Rarely. Labs are generally excellent free-whelpers. Veterinary backup should always be arranged for large litters.
How fast do Lab puppies grow?
Very fast — expect puppies to reach about 50% of adult weight by five months. Obesity is a lifelong concern for the breed.
Practical Record-Keeping for Labrador Breeders
Labrador litters are large and puppies grow fast. Consistent daily weights, feeding notes, and milestone documentation help breeders manage busy litters effectively and provide detailed records to puppy buyers and veterinarians.
The Animal Weight Tracker handles multi-puppy tracking with comparison charts, notes, and timestamped entries — all stored locally in your browser.