発はつ情じょう周しゅう期き

noun

estrous cycle

Biological term for the recurring reproductive cycle in female mammals, including phases such as proestrus, estrus, metestrus, and diestrus.

• マウスの発はつ情じょう周しゅう期きは約やく4日かです。

  The estrous cycle of mice is about 4 days.

• 発はつ情じょう周しゅう期きの各かく段だん階かいでホルモン濃のう度どが変へん化かする。

  Hormone levels change during each phase of the estrous cycle.