Table 1. Developmental stages of reproductive organs used to assess maturity stage (immature or mature).

Sex		Immature	Mature
Female	Ovaries	Not distinguishable	Distinguishable
	Follicles	Underdeveloped or in groups with different sizes	Well-developed or atretic and vitellogenic
	Uteri	Between tubular and wide in shape with developed walls	Tubular to wide in shape, developed walls, possibly with embryos
	Epigonal organ	Predominant	Present
Male	Testis	Lobulated, low blood supply	High volume, lobulated, increased blood supply
	Ductus deferens	Barely or not undulated	Strongly undulated
	Epigonal organ	Present	Limitedly present

Note:

Adapted from Osaer et al. (2015).