Insemination Timing Suggestions

INSEMINATION TIMING SUGGESTIONS

Many studies conducted by renowned experts in the field confirm that, the shorter the weaning-to-estrus interval (WOI), the longer and later the ovulation period. This means that sows coming into heat earlier (post weaning), will ovulate later and longer.

Hours

Days After Weaning

Avg. Duration of OvulationAvg. Duration of Estrus

The following slides are meant to offer graphical explanations of the previous statements. They also offer a definitive proof of the effectiveness of our recommended breeding protocol.

The vertical bar denotes the duration of estrus in Hours.

Hours

The horizontal bar represents the day “strong” standing heat is observed after weaning. This is what we are looking for when we perform heat detection. It is important to take note of the weaning dates so we can count properly.

Days After Weaning

The combined total of the pink and purple bars represent the average duration of estrus of sows (in hours) in relation to the number of days after weaning. The purple section represents the average time of ovulation.


We can now see that sows coming into heat 3 days after weaning will ovulate later and will have longer ovulation periods compared to days 4-9. Both estrus and ovulation cycles become shorter as the days after weaning become greater.

Hours

Days After Weaning


Twice per day:Since the interval between heat detections is about 12 hours, we use the 6 hour line to indicate the average mean duration of heat for the group of sows.

Hours

Days After Weaning


Once per day:Since the interval between heat detections is about 24 hours, we use the 12 hour line to indicate the average mean duration of heat for the group of sows…

Hours

Days After Weaning


Knowing when ovulation occurs is very important since breeding too early or too late will cause us to miss ovulation. This can negatively affect conception rates and litter-size; but how can we determine when the sow will ovulate?

Proper heat detection (recommended twice daily) is where we look for signs of “strong” standing heat which will help us determine WHEN the sow will ovulate.

HEAT DETECTION

ESTRUS

OVULATION

After knowing when sows ovulate, when is the best or proper time to breed then?

An effective breeding schedule should be set up on an animal by animal basis , individualized in such a way that an adequate amount of semen is delivered to the UTJ just before ovulation occurs. This would allow the sperm to be released, capacitate, and be fertile at the right time. Not all animals ovulate at the same time!

Breeding too early causes majority of the sperm to die before the egg cells are released; resulting in very low conception.

Breeding too late may cause you to miss the ovulation cycle completely, or only fertilize a few egg cells; hence producing small litters.

Hours

24 H

rs.

12 H

rs.

12 H

rs.

24 H

rs.

Days After Weaning

Second Insemination

First Insemination


This slide shows the efficiency of our recommended timing and how two inseminations overlap ovulation. It represents our suggested delay(s) for the first service at 24, 12, or 0 hours and a repeat insemination 8 hours later.

On days 3 & 4 (after weaning), we delay our first service by 24 hours and follow up with a second dose 8-12 hours later.

Hours

24 H

rs.

24 H

rs.

Days After Weaning

Second Insemination

First Insemination


On days 5 & 6 (after weaning), we delay our first service by 12 hours and follow up with a second dose 8-12 hours later.

Hours

12 H

rs.

12 H

rs.

Days After Weaning

Second Insemination

First Insemination


On days 7-9, gilts, and repeats, we delay our first service only long enough for the animals to relax from the boar exposure during heat detection (let them go into refractory heat); then we then follow up with a second service 8-12 hours later.

Days After Weaning

Hours

Second Insemination

First Insemination


In summary, our recommended timing protocols combine proper heat detection with the recognition of weaning-to-estrus intervals (WOI). Following them will effectively deliver semen at the best time for a successful breeding program.

Hours

24 H

rs.

12 H

rs.

12 H

rs.

24 H

rs.

Days After Weaning

Second Insemination

First Insemination


Second Insemination

First Insemination


Proper timing with an 8 hour repeat,using ONCE per day heat detection.

Days After Weaning

Hours

24 H

rs.

12 H

rs.

12 H

rs.

24 H

rs.

Second Insemination

First Insemination


24 hour initial delay on 3 & 4 day animals, heat detecting only ONCE per day.

Days After Weaning

Hours

24 H

rs.

24 H

rs.

Second Insemination

First Insemination


12 hour initial delay on 5 & 6 day animals, heat detecting only ONCE per day.

Days After Weaning

Hours

12

Hrs.

12

Hrs.

Second Insemination

First Insemination


0 hour initial delay on 7-8-9 day animals, heat detecting only ONCE per day.

Days After Weaning

Hours

Second Insemination

First Insemination


Proper timing with 8 hour repeat,using ONCE per day heat detection. (Animated)

Days After Weaning

Hours

24

Hrs.

12

Hrs.

12

Hrs.24

Hr

s.

Second Insemination

First Insemination


The following slides compare “our” recommended timing protocols to “common” AI/breeding schedules of farms throughout the world; and also show the difference between once per day and twice per day heat detection.

Days After Weaning

Hours

ONCE A DAY HEAT DETECTION, PROPER DELAY WITH 8 HR. REPEAT

Days After Weaning

Hours

TWICE A DAY HEAT DETECTION, PROPER DELAY WITH 8 HR. REPEAT

We have overlaid insemination bars that denote the following:

EXCELLENT chance of conception!

MARGINAL 50% chance of success.

VERY POOR! A waste of semen.

Second Insemination

First Insemination

Avg. Duration of OvulationAvg. Duration of

EstrusSecond Insemination

First Insemination


Estrus

Days After Weaning

Hours

ONCE A DAY HEAT DETECTION, 0 DELAY WITH 8 HR. REPEAT

O hour initial delay with 8 hour repeat, once per day heat detection

TWICE A DAY HEAT DETECTION, PROPER DELAY WITH 8 HR. REPEAT

Second Insemination

First Insemination


Estrus

Days After Weaning

Hours

Immediate insemination with 8 hour repeat, twice per day heat detection

Days After Weaning

Hours

TWICE A DAY HEAT DETECTION, 0 DELAY WITH 8 HR. REPEATTWICE A DAY HEAT DETECTION, PROPER DELAY WITH 8 HR. REPEAT

Second Insemination

First Insemination


Estrus

Days After Weaning

Hours

Immediate insemination with a 24 hour repeat, once per day heat detection

Days After Weaning

Hours

ONCE A DAY HEAT DETECTION, 0 DELAY WITH 24 HR. REPEATTWICE A DAY HEAT DETECTION, PROPER DELAY WITH 8 HR. REPEAT

Second Insemination

First Insemination


Estrus

Days After Weaning

Hours

Immediate insemination with a 24 hour repeat, twice per day heat detection

Days After Weaning

Hours

TWICE A DAY HEAT DETECTION, 0 DELAY WITH 24 HR. REPEATTWICE A DAY HEAT DETECTION, PROPER DELAY WITH 8 HR. REPEAT

Second Insemination

First Insemination


Estrus

Days After Weaning

Hours

12 hour initial delay with 8 hour repeat,once per day heat detection

Days After Weaning

Hours

ONCE A DAY HEAT DETECTION, 12 HR. DELAY WITH 8 HR. REPEATTWICE A DAY HEAT DETECTION, PROPER DELAY WITH 8 HR. REPEAT

Second Insemination

First Insemination


Estrus

Days After Weaning

Hours

12 hour initial delay with 8 hour repeat,twice per day heat detection

Days After Weaning

Hours

TWICE A DAY HEAT DETECTION, 12 HR. DELAY WITH 8 HR. REPEATTWICE A DAY HEAT DETECTION, PROPER DELAY WITH 8 HR. REPEAT

Second Insemination

First Insemination


Estrus

Days After Weaning

Hours


Days After Weaning

Hours


Second Insemination

First Insemination


Estrus

Days After Weaning

Hours


Days After Weaning

Hours


Second Insemination

First Insemination


Estrus

Days After Weaning

Hours


Days After Weaning

Hours


Second Insemination

First Insemination


Estrus

Days After Weaning

Hours


Days After Weaning

Hours


Second Insemination

First Insemination


Estrus

Days After Weaning

Hours

24 hour initial delay with a 24 hour repeat,once per day heat detection

Days After Weaning

Hours


Second Insemination

First Insemination


Estrus

Days After Weaning

Hours

24 hour initial delay with a 24 hour repeat,twice per day heat detection

Days After Weaning

Hours


Second Insemination

First Insemination


Estrus

Days After Weaning

Hours

Perfect heat detection (impossible to achieve but fun to look at); immediate insemination with an 8 hour repeat.

Days After Weaning

Hours

PERFECT HEAT DETECTION, 0 DELAY WITH 8 HR. REPEATTWICE A DAY HEAT DETECTION, PROPER DELAY WITH 8 HR. REPEAT

Second Insemination

First Insemination


Estrus

Days After Weaning

Hours

SUMMARY FOR THIS SECTION

ASIC’s Suggested Timing Protocols

• ASIC’s protocols are based on dry days post weaning.

• ASIC’s protocols allow for individualized and accurate timing on an animal by animal basis.

• ASIC’s methods are customized for the Absolute™ technology and are not “always” suitable for traditional catheters.

• ASIC’s protocols are proven to work! Please try to incorporate them in your farm; you will most likely NOT be disappointed…

• If you disagree with our methods, try it your way; but come back to this section if you do not get the desired results.

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Insemination Timing Suggestions