Traditional Culture Encyclopedia - Almanac inquiry - How many days is the best for sows to be weaned in the next estrus?
How many days is the best for sows to be weaned in the next estrus?
1. Pre-estrus, estrus, post-estrus and bisexual period (estrus);
2. Generally 2 1 day (18-23 days);
3. Estrus lasts about 2-3 days, luteal phase is about 13- 14 days, and follicular phase is about 3-5 days.
Second, the duration of sow ovulation.
The average duration of sow ovulation is 4 or 5 hours, and the longest is 10- 12 hours. The shortest duration of ovulation in sows is 6 hours and the longest is 20 hours.
Third, the ovulation start time of sows.
Ovulation period is mostly 16-48 hours before standing estrus begins. Generally, it is 24-36 hours after estrus, and 4-7 days after weaning is exactly 24-36 hours after estrus. The earliest ovulation time of sows is 14 hour after the start of estrus, and the latest ovulation time is 4 1 hour after the start of estrus.
Fourthly, the survival time of sperm in sow reproductive tract.
Because sperm can survive for up to 42 hours in the reproductive tract of sows, the time for sperm to have fertilization ability is only 25-30 hours. The survival time of sperm in sow reproductive tract is 20 hours.
Five, the egg has the ability of fertilization time.
The fertilization time of an egg is 8 ~ 10 hour, and the longest time is 15 hour. Generally, the time for an egg to be fertile is 8 hours.
Sixth, the best breeding time.
The first statement:
Before sow ovulation, especially a few hours before ovulation peak, that is, 2-3 hours before sow ovulation; In other words, mating starts from the beginning of estrus 12 ~ 24 hours (the beginning of estrus refers to the time when mating wants to accept climbing), and mating is repeated every 8 hours.
The second statement:
Weaning in 3 or 4 days-breeding begins 24 hours after standing for reaction.
5, 6 days weaning-after standing reaction 12 hours began to breed.
Weaning on the 7th, 8th and 9th days-forced mating after quiescence, and mating immediately.
Estrus occurs 3 days after weaning, and the best mating time is about 1 1 hour before ovulation.
- Previous article:When and when is Thanksgiving Day?
- Next article:Dreaming about the omen of genetically mutated pigs
- Related articles
- 202 1 February touched the auspicious day of the ecliptic?
- High-grade yellow calendar
- What are the famous dogs in the movie?
- Dream that there are bugs in the skin.
- Everything is suitable for the 2006 lunar calendar.
- 202 1 may full moon wine auspicious day list
- China New Year is coming. How to understand the custom that married daughters can't go to their parents' home for the New Year?
- Gregorian calendar 202 105 13
- I dreamed that I caught the weasel and put it in a bag.
- Past old almanac query