A prior study suggested the use of an intraperitoneal injection of oxytocin (1/800 ILJ) immediately prior to non-surgical artificial insemination of Wistar rats with frozen-thawed spermatozoids
to increase the number of pups at birth, suggesting oxytocin induces uterine contractions that might play an important role in spermatozoid
These individuals presented primary growth oocytes as well as spermatogonia, spermatocytes, and spermatozoids
Vitamin A, vitamin D, vitamin E, ram, seminal plasma, spermatological characteristics, sperm motility, abnormal spermatozoid
, scrotal circumference, tocopherols
The ultrastructure of spermatozoids
in anuran amphibians was studied for phylogenesis (AGUIAR JR.
Testosterone secreted by leyding cells is hecessary to develop and divided germinal cells which are the first phase of forming spermatozoid
The 14 other specimens (82.4%) contained 6 to 8 acini filled with male gametes (stages from spermatogonia to spermatozoid
) localized in the dorsal region, whereas the ventral region displayed about 15 female acini ([+ or -]S.D.
Remaining oocytes in a process of atresia and/or cell resorption and dispersed spermatozoid
fragments may be found.
On the other hand, because sperm has a large number of mitochondria, the experimental in INVITRO conditions on spermatozoid
cells done and the effects of iron nanoparticles on the sperm, due to infertility sperm .
In conclusion, the weight of the organisms and the weight of the spermatophore were significantly higher in feral than in farmed male shrimps; however, even though spermatozoid
counts were also higher in wild than in farmed specimens (6.22 [+ or -] 1.09 and 3.90 [+ or -] 0.27 million) the difference was not significant.
. In the region of the nucellar beak of the Ginkgo
Structural proof of the spermatozoid
releasing and attracting pheromone of Laminariales.
The testes of control adult insects were coated externally by connective tissue, but it does not penetrate the organ to form septa, and consequently, did not present the follicles filled with spermatozoid