Used to describe the time when an animal can mate, referring specifically to females.

Animal Breeding

While this phrase applies to animals, it's not appropriate for describing human fertility periods.

Not for Humans

Animals may exhibit noticeable behavior changes, such as being more vocal or restless.

Sometimes used metaphorically to express someone's extreme eagerness or enthusiasm for something.

Used casually among friends or in informal settings, but may be too colloquial for professional contexts.

Can imply a level of excitement that is nearly uncontrollable or very intense.