What should sows do if they are not in estrus?

The delayed estrus of sows is mostly caused by simple diet, insufficient protein or poor quality, or lack of vitamins and minerals, overweight or thinness of sows, and long-term lack of exercise.

[treatment measures]

For sows with slow estrus after weaning 10 day, the following measures can be taken to induce estrus and ovulation.

(1) Seduction: chase or climb the sow's crotch with the boar every morning and evening, or put the oestrus sow into the boar pen for polyculture.

(2) Breast massage: there are two kinds of skin massage and deep massage. The method of surface massage, repeatedly touching both sides of each row of breasts (don't touch nipples), can promote sow estrus. The method of deep massage is to rub with five fingers around each breast (don't pinch the nipple) to promote ovulation. Generally, after feeding early every day, massage on the surface 10 minute; After the sow is in estrus, the body surface massage and deep massage are 5 minutes each, and the morning before mating is changed to deep massage 10 minute.

(3) Medicated aphrodisiac: pregnant horse serum is injected subcutaneously once a day for 2-3 times, the first time is 5 5- 10/0ml, the second time is10-5ml, and the third time is15-30ml, and estrus can occur 3-5 days after injection. Intramuscular injection of chorionic gonadotropin, weighing 75 ~1000 kg sow, intramuscular injection of 500 ~ 1000 unit. The traditional Chinese medicine can be 50-80g of epimedium and 50-80g of tea, which are decocted in water, and taken daily 1 dose, with 2-3 doses taken continuously.

(4) Drug treatment: For sows that are not suitable for breeding due to metritis and vaginitis, 30 ml of 25% hypertonic glucose solution and 6,543.8+0,000 units of penicillin can be used for breeding after half an hour.