reproductive function
Technical term in biology and medicine referring to the physiological capacity to reproduce.
Reproductive function gradually declines with age.
この研究は男性の生殖機能に焦点を当てている。
This research focuses on male reproductive function.
生殖 (reproduction) is the broader concept; 生殖機能 specifically refers to the functional aspect of reproduction.
機能 (function) is a general term; 生殖機能 narrows it to reproductive function.
Compound of 生殖 (reproduction) and 機能 (function).