How old should a heifer be before she has a calf?

Usually it's best to wait until they are at least 15 months of age before breeding. Even though the early maturing breeds do reach puberty by the time they are around 7 to 9 months of age, it is best to wait until they are around 13 to 15 months of age before you can breed them.

What is the earliest a heifer can become pregnant?

The age at which beef heifers should be first mated depends upon the economics of management input against returns. Well grown British breed heifers can be mated as early as 15 months to calve at 24 months, but require extra managerial effort if good results are to be obtained.

How many years does it take a heifer to become old enough to have her first calf and begin producing milk?

Heifers that get off to a good start and are fed according to the National Research Council (NRC) standard guidelines should be developed well enough to begin A.I. breeding by 12 to 13 months of age. A heifer cannot calve by 2 years or 24 months of age unless she conceives by 15 months of age.

Should you keep a heifers first calf?

Time quickly gets away when you're a cow-calf operator, but it's essential to keep the first calf heifers on track. Heifers conceiving early in their first breeding season will have increased lifetime production and efficiency.

What age is best to breed heifers?

A: Breeding should occur when the heifer reaches puberty. Puberty is a function of breed, age, and weight. Most heifers will reach puberty and be bred by 12 to 14 months of age and will be between 55% and 65% of their mature weight when they first begin to exhibit estrous cycles.

When To Intervene When Calving First-Calf Heifers

Can you leave a bull with cows year round?

The good news is: It is possible to leave bulls with the cows year-round and still maintain a calving season of three months or less.

At what age is most desirable to calve heifers?

The research highlights the importance of AFC for survival of heifers and calving at optimal 22-26 months for increased lifetime yield and increased profitability. A lower age at first calving is associated with increased survivability and increased lifetime yield.

How long does a heifer stay in heat?

The key sign is that the female coming into heat will "stand" and be ridden. This will last anywhere from 12 to 18 hours with a range of 8 to 30 hours. Remember that ovulation in beef females does not occur at the time of standing heat (estrus) and will occur 12 to 18 hours after the end of standing heat.

How long is a heifer pregnant?

Gestation length ranges from 279 to 287 days. For most breeds, 283 days would be common. Cows carrying bull calves tend to have a slightly longer gestation compared to cows carrying heifer calves.

How big do heifers need to be to breed?

We would like for her to weigh at least 65% of her mature weight at first breeding, or at least 780 pounds. This "target weight" is important because if heifers are better developed, they will cycle and breed better.

How often do heifers come in heat?

After puberty, a heifer continues to have regular estrous cycles every 21 days (the normal range is every 18 to 24 days). The estrous cycle in cattle is complex and regulated by several hormones and organs (see Figure 1). Figure 1 —Phases of the bovine estrous cycle.

How many times will a bull breed the same cow?

Therefore, a 15-month-old bull should be able to service approximately 15 cows in a typical 60-day breeding season. Some data have been published that indicate that experienced bulls that pass a breeding soundness exam can service as many as 60 females in a 70-day season without pregnancy rates being compromised.

How old are heifers when they are first artificially inseminated?

The decision to breed heifers to calve between 22 and 23 months of age needs to begin before they are ready for first insemination. Set goals and monitor growth to ensure replacement heifers are reaching breeding size targets by 12 to 13 months of age.

How can you tell when a cow is about to calf?

How many times does a cow give birth in a lifetime?

It usually works out that cows are giving birth every 12-14 months. With the life span of U.S. dairy cows averaging 4-6 years, most cows have 2-4 calves in a lifetime.

How can you tell if a heifer is in heat?

Will a bull mate with the same cow twice?

All this is based on the shocking scientific discovery that a bull will never mate with the same cow twice.

Why do heifers mount each other?

Cows indicate reproductive receptivity by homosexual mounting, where the cow exhibiting the standing reflex is receptive, not necessarily the mounting cow. Mounting cows, although not necessarily receptive, are usually approaching receptivity so their activity indicates they may benefit from the presence of a bull.

How do you bring a heifer into heat?

The injection of prostaglandin causes any cows with a corpus luteum present on one of their ovaries to regress, ceasing progesterone production. This then triggers the cows to come into heat/estrus.

At what age can a bull calf breed?

Puberty in bulls occurs when they can produce viable sperm. This happens at approximately 12 months of age, though it can vary in individual bulls several months before or after this age depending on biological type (primarily frame size and potential mature weight), nutrition, and health status.

Is it OK to breed a bull to his daughter?

You can have father-daughter matings in beef cattle, but it is not recommended. This type of breeding practice is called inbreeding or close breeding. Again, this breeding practice is rarely practiced today, although it was common in the foundation animals of most breeds.

How many cows heifers can a bull cover?

In general, do not expose a young bull to more than 15 cows or heifers during breeding time. Bulls should be well developed and at least 24 to 30 months of age before they are allowed to run with 25 to 30 cows during the breeding season.

How many cows make a bull happy?

General recommendations for bull:cow ratios: The textbook recommendation for bull:cow ratio is typically 1 bull:20-30 females, with mature bulls closer to the 1:30 ratio and yearling bulls at 1 bull:20 cows. In cows in which estrous synchronization is used, the recommendations are altered by necessity.

How much does it cost to artificially inseminate a cow?

Costs will vary but costs to AI for cows are estimated at $37 for materials and $13 for labor. This includes $20 for semen and ranch labor at $20 per hour. Heifers are about the same total cost at $24 for materials and $15 for labor. The total cost per insemination is just under $50 per Page 3 Page 3 female.

Can you AI heifers?

Many producers of purebred and commercial beef cattle can profitably utilize artificial insemination (AI) on virgin heifers or on the cow herd or both.