Presenting

In medicine, the term presenting means not only present, but seen. For example, at birth most babies present head first and their presenting part is their head.

Often, this term refers to when a condition is first noticed by a physician or first brought to a physician's attention. A presenting condition may be one that causes the patient to consult a physician. For example, someone with advanced cancer may present with certain non-specific symptoms such as pain or unexplained loss of weight.

In discussions of animal sexual behavior, the female is said to "present" when she assumes a position suggesting that intercourse is desired, typically when in estrus.

...
Wikipedia