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 (vīt′l-ō-jĕn′ĭ-sĭs, vĭt′-)
Formation of the yolk of an egg.

vi′tel·lo·ge·net′ic (-jə-nĕt′ĭk), vi′tel·lo·gen′ic (-jĕn′ĭk) adj.


(ˌvɪtələʊˈdʒɛnɪk) or


(Zoology) zoology producing or stimulating the formation of yolk
[C20: from vitellus + -genic]
ˌvitelloˈgenesis n
References in periodicals archive ?
Characteristics of atresia were observed in early and late vitellogenic oocytes (atresic immature oocytes), and in mature oocytes (atresic mature oocytes), beginning in April and throughout gametogenesis and postspawning resorption (Fig.
During vitellogenic stage, the oocytes began to increase in size, due to accumulation of yolk.
diameter of vitellogenic oocytes, the pellucid zone thickness and the follicular cell height, we selected 50 undamaged oocytes without retraction and with cuts crossing the nucleus for each of the studied species.
Anatomy and histology of reproductive organs of female Homalodisca coagulata (Hemiptera: Cicadellidae: Proconiini), with special emphasis on categorization of vitellogenic oocytes.
Among reproductively active fish, oocytes in various stages of development including vitellogenic oocytes were present while the gonad of post-spawning fish were characterized by the presence of yellow-brown bodies and large, centrally located gonadal lumen (Figure 3 a, b).
Primary growth oocytes, cortical alveolar oocytes, Primary vitellogenic oocytes, and secondary vitellogenic oocytes were present.
The presence of elevated GSIs and mature, vitellogenic oocytes was used to estimate reproductive season in weeks for each population of fishes.
The number of pre-vitellogenic and vitellogenic oocytes were positively correlated with female total weight and length, and ovary weight in both species.
1]) to remove interfering substances such as the feces and blood, celomatic liquid, vitellogenic material and any microorganisms (Tabata & Portz, 2004).
Mature females that had vitellogenic oocytes, hydrated oocytes, or postovulatory follicles were characterized as females that were expected to spawn in the current spawning season.