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Breeding, Genetics & Reproduction
Every calf, every heifer and every pregnancy starts with a breeding decision. Learn heat detection, AI timing, sire and genomic selection, fertility records and how to get cows pregnant on schedule.
50 guides in this section.
- Estrus Detection in Dairy Cows
A cow that is bred at the wrong time is a cow that costs you another three weeks. Good heat detection starts with knowing what you are looking for... - Heat Detection Tools Compared
There are more ways to catch a cow in heat than ever, from a bucket of tail paint to sensors on a collar. The right choice depends on your herd size,... - Timing Artificial Insemination
Semen can be excellent and technique can be perfect, and a cow will still miss if she is bred at the wrong time. Timing is mostly about knowing when... - Synchronization Protocols for Dairy Herds
Synchronization programs line up cows so they can be bred at set times without waiting to see heat. They are a veterinary program, not a... - Fixed-Time AI: Pros and Cons
Fixed-time AI means breeding cows on a set schedule instead of waiting for heat. It suits some herds very well and others not at all. - Bull Selection for Dairy Herds
Every sire you pick will show up in your herd for years through his daughters. A little planning before you open the catalog keeps you from buying... - Dairy Sire Selection Indexes Explained
A selection index folds many traits into a single ranking so you do not have to weigh dozens of numbers by hand. It helps only if you know what is... - Genomic Testing in Dairy Heifers
Genomic testing reads a small tissue or hair sample to predict a heifer's genetic merit while she is still young. It helps you decide which animals... - Genomic Testing for Commercial Dairy Farms
A registered herd may test for pedigree and sales. A commercial herd tests for a different reason: to make better replacement and breeding decisions... - Inbreeding and Dairy Herd Fertility
Inbreeding rises when a herd uses animals that share many of the same ancestors. Over time it can reduce fertility, survival and performance, and it... - Crossbreeding Dairy Cattle: Is It Right for You?
Crossbreeding means mating cows of one breed to bulls of another to take advantage of traits that complement each other. It can help some herds with... - Sexed Semen in Dairy Herds
Sexed semen is processed so that most of the resulting calves are one sex, usually heifers. Used well, it helps herds produce the replacements they... - Beef-on-Dairy: Breeding Decisions
Breeding some dairy cows to beef sires produces calves with market value, but the decision touches heifer supply, calving ease, calf health and how... - Conception Rate Benchmarks
Conception rate tells you how often a breeding results in a pregnancy. It is one of the clearest measures of how well your breeding program is... - Pregnancy Rate vs. Conception Rate
Conception rate and pregnancy rate sound alike, but they measure different things. One shows how well breedings work. The other shows how quickly... - Pregnancy Diagnosis Methods
Knowing early and accurately which cows are pregnant lets you rebreed open cows without losing another cycle. Several methods are in use, and each... - Early Pregnancy Loss in Dairy Cows
Early pregnancy loss means a cow conceives and then loses the pregnancy before it is far along. It is hard to see and expensive, so records and a... - Repeat Breeder Cows: Investigation Plan
A repeat breeder is a cow that cycles normally but fails to become pregnant after several breedings. Finding the reason takes organized records, a... - Anestrus in Dairy Cows
Anestrus means a cow is not showing heat because her ovaries are not cycling normally, or because her heats are missed. Telling these apart is the... - Cystic Ovaries in Dairy Cattle
Ovarian cysts are fluid-filled structures on the ovary that can interfere with normal cycling. They are diagnosed by a veterinarian, and management... - Fertility and Body Condition Score
Body condition score is a quick, low-cost look at how much energy reserve a cow carries. Cows that are too thin or that lose too much condition after... - Nutrition and Dairy Cow Fertility
Cows that eat well, keep condition and avoid metabolic trouble generally breed back better. Feeding for fertility is mostly about steady intake,... - Heat Stress and Reproduction
Hot, humid weather makes cows eat less, produce less and breed poorly. Cooling, shade, water and a few breeding adjustments can protect fertility... - Lameness and Conception Rates
A lame cow hurts, eats less and shows weaker heats. Lameness is one of the most common hidden reasons cows fail to breed back, and early detection is... - Postpartum Fertility Management
What happens in the weeks after calving sets the stage for the next pregnancy. A clean calving, a healthy fresh cow and a clear plan for when... - Voluntary Waiting Period Decisions
The voluntary waiting period is the number of days after calving that you choose not to breed a cow, even if she shows heat. Setting it on purpose,... - Breeding Heifers: Age and Weight Targets
A heifer should be bred when she is big enough and growing well, not just when she reaches a certain birthday. Size and condition at breeding set up... - Heifer Fertility and First Calving
Getting a heifer pregnant on time is only half the job. How she is fed, housed and handled through pregnancy and at calving sets the tone for her... - Calving Ease and Sire Selection
Choosing the right sire can lower the number of hard calvings on your farm. The goal is to match calving ease information to the animals you are... - Dystocia Management on Dairy Farms
Dystocia means a difficult calving. It costs calves, cows and labor, and the best defense is a plan that everyone on the farm knows before the first... - Bull Fertility Testing
A bull that looks healthy can still be a poor breeder. A breeding soundness exam done by a veterinarian before the season starts is the most reliable... - AI Technique Troubleshooting
When conception rates fall, the cause is rarely one thing. Work through the chain from the cow to the semen to the technician, and let your records... - Semen Handling and Storage
Good semen is only worth something if it stays frozen until the moment it is used. Careful tank care and handling protect a large genetic investment. - Embryo Transfer in Dairy Cattle
Embryo transfer lets a farm get more calves from its best cows by placing embryos in recipient cows or heifers. It can speed genetic progress, but it... - IVF in Dairy Herds: Practical Overview
In vitro fertilization, or IVF, produces embryos in a laboratory from eggs collected from donor cows. For some farms it opens options that... - Sexed Embryos and Dairy Genetics
Embryo transfer lets a farm get more calves from its best cows, and sexing the embryos adds control over how many heifers arrive. It is a tool with... - Genetic Selection for Mastitis Resistance
Mastitis is mostly a management problem, but genetics can tilt the odds. Choosing sires and replacements with better udder health traits is a slow,... - Selecting for Feed Efficiency
Feed is the biggest cost on most dairy farms, so cows that turn feed into milk more effectively are valuable. Selecting for it is possible, but it... - Selecting for Longevity in Dairy Cows
A cow that stays healthy and productive for many lactations costs less per pound of milk than one replaced early. Longevity is partly genetic, partly... - Polled Genetics in Dairy Herds
Polled cattle are born without horns, which can remove the need for disbudding. Using polled sires is one option farms are considering, and it comes... - A2/A2 Genetics: Breeding Considerations
Some milk buyers and brands want milk from cows that carry two copies of the A2 form of a milk protein gene. If you are thinking about it, treat it... - Color and Breed Standards in Dairy
Each dairy breed has a written standard describing the ideal animal, and registered cattle have rules about color and markings. Knowing them helps... - Dairy Breed Comparison: Holstein, Jersey, and More
No breed is best for every farm. The right choice depends on your milk market, feed, housing, labor and goals, so it helps to know what each breed... - Jersey Herd Management Tips
Jerseys are smaller and have their own habits. Herds that manage them well pay attention to calving, early lactation, feed and comfort, and handle... - Holstein Herd Management Tips
Holsteins can produce a great deal of milk, but they ask a lot in return. Comfort, feed, transition care and attention to feet and heat decide how... - Crossbred Cow Management
Crossbred cows can bring a useful mix of traits, but they also bring variation. Good records and a clear plan keep a crossbred herd from turning into... - Record Keeping for Reproduction
Good reproduction records tell you which cows are bred, which are open and why. Without them, a herd runs on memory, and memory fails at the worst... - Herd Reproduction Reports Explained
Herd software can produce long reproduction reports full of rates and averages. You do not need to be a statistician to use them, but you do need to... - Improving 21-Day Pregnancy Rate
The 21-day pregnancy rate shows how quickly a herd gets eligible cows pregnant. It combines two things you can work on: how many cows you breed and... - Annual Breeding Calendar for Dairy Herds
A breeding calendar turns good intentions into dates. It lets you see calvings coming, plan labor and feed, and spot trouble before it costs milk.