accessory sex organ

synonym: secondary sex organ
https://doi.org/10.1351/goldbook.10325

Organ or structure other than the gonads that matures at puberty and assists indirectly in sexual reproduction by nurturing and transporting gametes.

Notes:
  1. In the human female the accessory sex organs include the Fallopian tubes, uterus, vagina, and the external genitalia.
  2. In the human male, the accessory sex organs include the epididymis, vas deferens, ejaculatory duct, urethra, seminal vesicles, bulbourethral glands, prostate, and penis.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 715 (https://doi.org/10.1515/pac-2015-1202)