…The simplest method is to know if pregnancy has been established by the absence of estrus during the next estrus period after mating, but this method lacks certainty because some individuals may have anestrus due to causes other than pregnancy, and some individuals may show signs of estrus even when pregnant. As an accurate and practical method, rectal palpation is widely used for large livestock. This is a method in which an arm is inserted through the rectum and the fingertips are used to palpate the ovaries and uterus through the intestinal wall to confirm the presence of the fetal membranes and corpus luteum. An experienced person can make a diagnosis after 35 to 40 days in the case of cattle, and generally after 50 days. … *Some of the terminology that mentions "rectal palpation" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…最も簡便な方法は交尾後の次の発情期に来潮しないことによって妊娠の成立を知ることであるが,この方法は妊娠以外の原因による無発情や,妊娠していても発情徴候を示す個体もあるために,確実性に欠ける。正確で実用的な方法としては,大家畜については直腸検査rectal palpationが広く用いられている。これは直腸から腕を挿入し,指先で腸壁を通して卵巣,子宮を触診して胎膜と妊娠黄体の存在を確認する方法で,熟達者ならウシの場合で35~40日,一般には50日以降診断が可能である。… ※「rectal palpation」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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