atresia

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atresia

[ə′trē·zhə]
(medicine)
Imperforation or closure of a natural orifice or passage of the body.
References in periodicals archive ?
Mature females may present previtellogenic, vitellogenic and atretic follicles, and corpora lutea.
Thus, according to study results, it can be concluded that waves emitted from mobile phones may reduce the number of secondary and Grapian follicles by interfere in controlling routines and also increase the atretic follicles that can have adverse effect on fertility of female rats.
In addition, ovaries from BPA500 animals had fewer corpora lutea, fewer antral follicles, and more atretic follicles than did those from controls.
The gametogenic cycle in bivalves includes development and maturation of gametes, spawning, and subsequent resorption of residual atretic gametes (Kennedy & Battle 1964, Pipe 1987, Dorange & Le Pennec 1989, Barber 1996).
Three cases had CNS anomalies (corpus callosum anomaly and atretic occipital encephalocele) (Figure-2 and 3).
The atretic follicles were present throughout the year but they were abundant during autumn (spent ovaries) and winter (resting ovaries) and these atretic follicles indicated the spawned individuals.
Degenerating female follicle and Atretic oocytes were clearly detected in post-spawned P.
Dural herniation with atretic brain tissue excised and dura was closed.
Jegede [6] further investigated the control of reproduction in Oreochromis niloticus using Hibiscus rosa-sinensi (Linn) leaf meal as reproduction inhibitor and showed disintegration of spermatids and necrosis in testes and severe atretic follicles in ovaries at a high inclusion level of 4.0 g/kg diet.