Perineal protection

Japanese: 会陰保護 - えいんほご
Perineal protection

...The reason is unknown, but it is said that opposite-sex twins are frowned upon and eliminated, or that Japanese women have low levels of gonadotropins, which cause ovulation.
[Classification by delivery process]
Natural childbirth is a birth that occurs by natural birth force without artificial assistance (except for perineal protection and minor episiotomy), while artificial childbirth is one in which artificial assistance is added. Normal childbirth is when, during the normal pregnancy period, the development of the fetus and its appendages, the birth canal, and the birth force are all appropriate, the cervix dilates smoothly, the presenting part descends, birth is completed vaginally within a certain time, and neither the mother nor the child suffers any damage from birth.

*Some of the terminology that refers to "perineal protection" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…その原因は不明であるが,男女の異性双胎が嫌悪され淘汰されたとか,排卵をおこすゴナドトロピンが日本女性では少ないためともいわれる。
[分娩経過による分け方]
 自然分娩とは自然の娩出力により人工的な介助(ただし会陰保護,軽度の会陰切開を除く)を行わないで分娩したものをいい,人工的介助を加えたものを人工分娩という。正常分娩とは正規の妊娠期間に,胎児およびその付属物の発育,産道,娩出力がそれぞれ適切で,順調に子宮頸管が開大し,先進部が下降して,一定時間内に経腟的に分娩が終了し,かつ母児とも分娩による障害を受けない場合をいう。…

※「会陰保護」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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