How to promote oestrus and ovulation in sows?

In order to make sows achieve multiple births and high yield, and promote normal oestrus and ovulation of non-estrus sows or repeatedly infertile sows, the following artificial estrous measures can be taken on the basis of strengthening feeding management.

boar oestrous

Estrus boar chase long not oestrus sow, or male sow shut in the same circle, let sow through vision, smell and touch stimulation, via nerve conduction, so that pituitary gland produces follicle maturation hormone, thus oestrus ovulation. Boar fresh semen 50 ~ 200 ml can also be injected into the uterus of sows to stimulate the genital mucosa and promote oestrus and ovulation.

piglet litter or early weaning

If there are more sows in a more concentrated time to give birth, according to the specific circumstances, the litter or poor lactation sow born piglets foster care to other sows, so that these sows no longer feed piglets, so that they can quickly estrus. In addition, the piglet weaning time advanced to 4 5 days or earlier, control the number of lactation, so that sow udder due to milk accumulation and expansion, reduce oxytocin secretion, can make sow rapid oestrus ovulation. The specific method is to train piglets to eat early, isolate mother and child after piglets eat, and gradually reduce nursing times until weaning.

Turn change to strengthen movement

Sows that have not been in estrus for a long time will be transferred to new pens and raised together with sows that are still in estrus. The oestrus and ovulation are promoted by climbing the oestrus sow. Strengthen sow movement, grazing, green, which is also conducive to promoting oestrus.

Pregnant horse serum injection

Pregnant mare serum contains a large number of placental gonad hormones, can promote sow oestrus and ovulation, and can improve the pregnancy rate. The method of administration is subcutaneous injection, each injection of 5 ml, once daily, continuous injection for two days.

Injection of synthetic chemical hormones

For a long time do not estrus sow, can inject chemical synthetic hormones, promote their sexual desire, adjust reproductive function. Such as a subcutaneous injection of stilbestrol 3 mg, or intramuscular injection of 0 . 1 ~ 2 mg of 1% benzoic acid, 1 ~ 2 mg of diglycol, or 1 000 IU of chorionic gonadotropin.

Chinese herbal medicine aphrodisiac

① Angelica sinensis 40g, Cinnamomum cassia 20g, Actinolite 40g, Radix Ginseng 25g, Cortex Euonymi 25g, Fennel 25g, Radix Rehmanniae 25g, Rhizoma Chuanxiong 20g. Mix the powder into feed and let pigs eat it.

(2) Angelica sinensis 75g, Rhizoma Atractylodis Macrocephalae 50g, Rhizoma Chuanxiong 50g, Flos safflower 40g, Herba Epimedii 100g, Massa Medicata 100g, decocted in water, white spirit as the lead, orally administered in three times.

③ Chen Ai 250g, motherwort 500g, angelica 50g, decocted in water.

④ leek 100 ~ 150g, brown sugar 150g, broken and mixed with hot yellow wine to feed.

5 Epimedium 50g, water, yellow wine 150ml each, decocted.

Fried glutinous rice flowers, feeding 500g a day, continuous service for several days.

(7) Saururus chinensis, Cinnamomum camphor bark 50g each, Lindera spicata 250 - 500g, decocted with water.

white wine Qu grind fine, with wine after re-wrapped with gauze, put into the sow vulva, outer tie rope, 2~3 days after vulva swelling that is taken out.