How do you calculate farrowing rate?
How do you calculate farrowing rate?
To calculate farrowing rate, keep a record of all sows and gilts served and all farrowings over a 12-month period. Divide the number of sows farrowed over 12 months by the number of sows and gilts served and multiply the answer by 100.
What is the farrowing index of sow?
Farrowing index (herd) or litters per sow per year The number of farrowings taking place in a given period, expressed on an annual basis, divided by the average number of sows in the herd during the period when those sows were mated.
What is a normal litter of pigs?
7.5 pigs
The average litter size is 7.5 pigs, and it is not uncommon for a sow to have 12-14 pigs per litter. The gestation period of a sow (from the time she is bred until she farrows) is 114 days. A sow can have her first litter at approximately one year of age.
How many times can a pig Farrow?
A well fed sow will produce at least 10 piglets (litter) from each pregnancy and may have 2 litters each year. After studying this unit you should be able to: 1 Care for the pregnant sow. 2 Recognise when the sow is about to farrow (give birth).
How do you calculate pigs per sow per year?
Litters per sow per year (LSY) is defined as the number of litters farrowed divided by the number of years the sow is in the herd. This can be calculated by using the total number of gestation days and total number of mated female days: (Stalder, 2002).
How many times can a sow farrow in a year?
It all begins at the farrowing stage. Farrowing is the term used to describe a female hog giving birth. Females will normally have anywhere from 11 to 13 pigs per litter. With a sow being able to farrow close to three times a year, one sow can have around 36 piglets in one year.
What is conception rate in pigs?
Conception rate: On average, the conception and farrowing rates of sows during one year before the experiment were 95.7 and 90.9%, respectively. During the experiment, the conception rate of sows inseminated with extended fresh semen (control) and frozen-thawed semen was 88.9 and 75.8% (P=0.150), respectively.
How long after farrowing can a sow be bred?
“Many sows weaned during the first two days after farrowing will not breed back normally until five to eight weeks postpartum,” says Britt.
What is dystocia in pigs?
Dystocia, difficulty farrowing, is a common issue in the swine industry. If piglets are not removed from the reproductive tract of the sow in a safe, timely manner, the piglets could suffer from asphyxiation and die.
What is the farrowing rate of sows?
So, therefore, if we serve 100 sows and 87 of these animals farrow, we have a farrowing rate of 87%. Why is the farrowing rate important? It is only important as it gives us a guide to how many sows are required to be served in this batch. It is only a guide.
How long does it take for a pig to give birth?
The farrowing process This can range from 3 to 8 hours and piglets are usually delivered every 10 to 20 minutes but there is a wide variation. Consult the sow and litter card to see if there have been any previous problems at farrowing. For example if a sow has had high stillbirth rates, monitor her more closely and take any necessary actions.
What is the farrowing rate and pregnancy detection period?
The farrowing rate is 3? months historical. The pregnancy detection is 4-6 weeks historical. The non returnable is 3-4 weeks historical. You need to use all of these numbers to adjust the required breeding target to ensure that it is more than likely that the required numbers to farrow are achieved. Relax about your farrowing rate.
Why don’t pigs breed in winter?
In feral wild pigs, decreasing day length in late summer and autumn would provide a physiological cue to indicate that it is not an optimum time for breeding because the piglets would be born in the midwinter. Thus in nature, that would most likely mean death of the newborn piglets and loss of the whole litter.
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