This word is probably related to the Latin pathus meaning "sexually receptive."

In this case, females are sexually receptive at any time, but only fertile when an ovum is released from an ovary.

Males compete for access to sexually receptive females.

Men are sexually receptive in summer, and women in winter.

She then exhibits a sexually receptive behavior, a situation that may be signaled by visible physiologic changes.

He undermined military discipline if he offered himself as sexually receptive in exchange for gifts or favors.

These friendships are sometimes formed between sexually receptive females and newly immigrated males.

Another egg descends into the uterus and she becomes sexually receptive.

Females are sexually receptive for less than five hours each year.

They may moult several times as adults, becoming sexually receptive each time until death.