About GestationCalc

GestationCalc is a free resource built for farmers, ranchers, livestock producers, and pet breeders who need fast, accurate animal gestation calculators. Enter a breeding date — get the expected due date, gestation timeline, and key milestones in seconds. No account, no signup, no cost.

Who Runs GestationCalc

GestationCalc is an independently operated publisher and is not affiliated with any veterinary practice, university, or government agency. It was built by the GestationCalc team to give farmers, ranchers, and pet owners a single, ad-light place to look up accurate gestation timelines without wading through forums or unsourced blog posts. The site is maintained on an ongoing basis, with calculators and reference data checked against the primary sources listed below. You can reach the team directly at contact@gestationcalc.com.

Our Mission

We believe that accurate, science-based animal reproduction information should be freely accessible to everyone — from large-scale commercial operations to backyard hobby farms. Our calculators are built on peer-reviewed research and continuously reviewed by animal husbandry specialists.

Our Editorial Team

GestationCalc content is developed and reviewed by a team with backgrounds in:

• Animal husbandry and livestock production — beef and dairy cattle, sheep, goats, and swine
• Veterinary medicine consultation — large animal and small animal practitioners
• Agricultural extension — drawing on methods from Penn State Extension and University of Minnesota Extension
• Canine reproduction — breeding program management and whelping support

All calculator data and content is reviewed against primary sources including USDA production statistics, university extension publications, breed association data, and the Merck Veterinary Manual.

Our Data Sources

We rely exclusively on validated, peer-reviewed data sources:

• USDA National Agricultural Statistics Service — national livestock production data
• Penn State Extension — livestock reproduction and management guides
• University of Minnesota Extension — animal production and health resources
• Merck Veterinary Manual — veterinary reproduction reference
• Breed association registries (American Angus Association, Holstein Association USA, American Kennel Club, etc.)

Our Editorial Process

Every calculator and article goes through the same process before it is published:

1. Research: gestation ranges and species data are pulled from primary sources — the Merck Veterinary Manual, USDA statistics, university extension publications, and breed association registries — not from other websites.
2. Review: a team member with relevant animal husbandry or veterinary-consultation background checks the figures and copy for accuracy before anything goes live.
3. Fact-check: numeric ranges (average, minimum, and maximum gestation length) are cross-checked against at least two independent sources where available.
4. Ongoing review: published pages are re-checked periodically, and immediately whenever a reader flags a possible error via contact@gestationcalc.com. This page and our blog articles show the date they were last reviewed.

Our Calculators

We currently offer free gestation calculators for:

Editorial Standards

All content on GestationCalc is reviewed by subject-matter experts before publication and periodically updated to reflect current research. We do not publish content that conflicts with established veterinary and agricultural science. If you believe any information is inaccurate, please contact us or email contact@gestationcalc.com and we will review it promptly.

Disclaimer

GestationCalc provides general information for educational purposes. Due dates generated by our calculators are estimates based on average gestation periods. Always consult a licensed veterinarian for medical advice specific to your animal.