獣医は避妊・去勢手術をすると、 乳腺腫瘍 や 子宮蓄膿症 の予防になるとも主張して避妊手術を勧めているが、悪質な詐欺だ。 避妊・去勢手術によるいろんな 後遺症や合併症 の発症を愛犬家の国民に隠している。

　避妊・去勢手術の後遺症として発症しやすくなる 尿失禁 や 血管肉腫 、 精巣腫瘍 、 ワクチンの副作用 、 肥満 、 前立腺癌 、 甲状腺機能低下症 、および、 骨肉腫（骨の癌） については既に翻訳文を紹介してある。愛犬の健康保持にご参考になれば幸いだ。

　上記翻訳文の 原文 は上にリンクした学術論文の後半にある。　

Orthopedic Disorders
In a study of beagles, surgical removal of the ovaries (as happens in spaying) caused an increase in the rate of remodeling of the ilium (pelvic bone), suggesting an increased risk of hip dysplasia with spaying.
Spaying was also found to cause a net loss of bone mass in the spine.
Spay/neuter of immature dogs delays the closure of the growth plates in bones that are still growing, causing those bones to end up significantly longer than in intact dogs or those spay/neutered after maturity. Since the growth plates in various bones close at different times, spay/neuter that is done after some growth plates have closed but before other growth plates have closed might result in a dog with unnatural proportions, possibly impacting performance and long term durability of the joints.
Spay/neuter is associated with a two fold increased risk of cranial cruciate ligament rupture. Perhaps this is associated with the increased risk of obesity.
Spay/neuter before 5 ? months of age is associated with a 70% increased aged-adjusted risk of hip dysplasia compared to dogs spayed/neutered after 5 ? months of age, though there were some indications that the former may have had a lower severity manifestation of the disease. The researchers suggest “it is possible that the increase in bone length that results from early-age gonadectomy results in changes in joint conformation, which could lead to a diagnosis of hip dysplasia.”
In a breed health survey study of Airedales, spay/neuter dogs were significantly more likely to suffer hip dysplasia as well as “any musculoskeletal disorder”, compared to intact dogs, however possible confounding factors were not controlled for, such as the possibility that some dogs might have been spayed/neutered because they had hip dysplasia or other musculoskeletal disorders.
Compared to intact dogs, another study found that dogs neutered six months prior to a diagnosis of hip dysplasia were 1.5 times as likely to develop clinical hip dysplasia.
Compared to intact dogs, spayed/neutered dogs were found to have a 3.1 fold higher risk of patellar luxation.

　次回は 加齢性認知症 　Geriatric Cognitive Impairmentについて翻訳して紹介する。

関連随想集

避妊去勢有害無用論の随想集

狂犬病ワクチン副作用被害：日本は ５万匹！　内３，０００匹毎年死亡！

狂犬病注射有害無用論の随想集