The essentials of mastering the best mating time for sows

The best time for mating is determined by the time of ovulation and the survival time of sperm in sows.

The time of ovulation in sows: standing estrus begins for 26 hours, and 95% of the eggs are ovulated at the same time.

Survival time after ovulation: no more than 6 hours

The survival time of boars after sperm excretion was 18 hours, the time of sperm capacitation was 6 hours, and the motility of boars lasted 12 hours after entering the uterus.

Check the sow estrus twice a day: 9: 00 a. M. and 5: 00 p. M. Estrus in the morning, mating in the afternoon, has passed 6-7 hours, sperm survival time is 18 hours, about 25 hours. Breed again in 12 hours. 6, 7, 12, 18, 36, 37, basically including the process of ovulation.

The best time for sows to ovulate and breed: check once a day and mate in estrus; check twice a day and postpone half a day for mating; check four times a day and mate 24 hours later.

Two times of mating: the interval between reserve sows and parturient sows was 12 hours and 24 hours respectively.

A vivid summary of the timing of oestrus and mating of sows in folk proverbs:

The vulva is stained with grass, and insemination is just right.

Look in a daze, inseminate and conceive

Stand still, just in time to breed

When the mucus thickens, it is the heat.

1. If sows return to estrus within 20 days after mating (18-19), it is too late for mating.

2. If the sows return to estrus after 22 days after mating (23-24), the mating will be premature.

3. If you return to love within 21, 22 and 23 days after mating, it means that the mating failed and the semen quality needs to be checked.

4. If you return to estrus within 39-45 days after mating, it means that you missed the last estrous cycle and need to check the method of estrus detection.

5. If you return to love within 25-38 days after mating, it is outside the normal range. Sows are pregnant but cannot conceive, which may be due to: 1) stress. 2) moldy feed. 3) too few eggs have the ability to conceive. 4) uterine infection. (source: encyclopedia of Pig Industry)