First, the cause of pseudopregnancy Due to early embryonic death and absorption, pregnancy corpus luteum sometimes continues to exist, then progesterone continues to secrete, as if the pregnancy continues. In addition, due to malnutrition, climate change and reproductive organ diseases, resulting in endocrine disorders of sows, resulting in ovaries formed after the ovulation of estrus sows can not be formed on time (usually 14-15 days), due to the continued secretion of progesterone , inhibiting the secretion of follicle-matured follicles in the anterior pituitary, arresting the development of follicles, and delaying or stopping the estrus cycle of sows. Under the action of progesterone, the endometrium is obviously hyperplastic and hypertrophic. The depth and distorsion of the gland are increased, the uterine contraction is weakened, and the breast lobules develop. Individual pigs can also secrete a small amount of milk. The above two kinds of corpus luteum is essentially a persistent corpus luteum. Second, measures to improve the nutritional conditions before and after sow mating; to prevent and treat sow reproductive tract diseases; to do the winter and early spring cold, thermal insulation work; early spring mating sows, appropriate to feed more green and juicy feed before mating Finished multi-vitamin, can guarantee the normal development of follicles; In order to dissolve the persistent corpus luteum, injectable prostaglandin 5 mg and 1000g international unit of pregnant horse serum, can be intramuscular injection of both drugs, can also be intramuscular injection of prostaglandin, 3 Days after the intramuscular injection of pregnant horse serum.
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