“Dissections confirmed that these females had received a spermatophore at mating and had developed normal ovaries.”

“Within 1 hr, the resulting spirally coiled, gelatinous spermatophore has been transferred to the female.”

“At each mating, the female receives a bipartite spermatophore consisting of a spermatophylax and a sperm-containing ampulla.”

“Fusion of the sperm with the egg plasma membrane is restricted to specific regions of the spermatozoon.”

“Within the bill are sections that make it illegal to sell your sperm or eggs or to receive remuneration for acting as a surrogate mother.”

“Other benign conditions resulting in a scrotal mass, such as testicular torsion, spermatocele, varicocele, or tuberculosis, must be ruled out.”

“Contact fungicides are only active around the actual seed or spermosphere.”

“Many of these immotile spermatids are dislodged from the spermatheca and swept away as oocytes parade through the reproductive tract.”

“The sclerotized spermatheca is flexible and has muscle attachments between the base of the body of the spermatheca and its apex.”

“The cloaca is relatively complex in more derived groups, with a spermatheca in females and several sets of cloacal glands in both sexes.”

“Only one spermatozoid is placed via microinjection inside the ovocytes in order to achieve fertilisation.”

“After the oocyte has been fertilized by the spermatozoid, a reaction called the zonal reaction occurs in the pellucid zone.”

“The pellucid zone constitutes a specific obstacle as it cannot be penetrated by a spermatozoid of another species.”

“A primary spermatogonium surrounded by a pair of cyst cells undergoes four mitotic divisions, forming a cyst of 16 primary spermatocytes.”

“The binding model displayed in Fig.8 A has been observed from crystallographic studies on B-DNA dodecamers stabilized with spermine.”

“Because of their positive charges, putrescine, spermidine, and spermine show a high affinity with the acidic constituents of the cell.”

“By comparison, the tetra-amine spermine only binds weakly to peptide carboxylate groups, and not to the a-helical conformation.”

“By contrast, mutant hermaphrodites are self-sterile when unmated due to a failure in spermatid activation.”

“Development of the spermatid flagellum begins immediately after meiosis.”

“For introduction of spermatid mitochondria, in vitro fertilization was carried out by microinjection of spermatids into unfertilized oocytes as described previously.”

“Over the past five years, he has studied spermiogenesis as a major determinant of the genetic integrity of the male gamete.”

“Knowledge of spermiogenesis in reptiles, especially in lizards, is very limited.”

“Thus, PP1γ2 might have a fundamental, isoform-specific role in mammalian spermiogenesis.”

“Fusion of the sperm with the egg plasma membrane is restricted to specific regions of the spermatozoon.”

“The annulate corpuscle of the spermatozoon is the metamorphosed nucleus of the cell from which the spermatozoon is developed.”

“We rather think of the latter as a new form of life to whose nature both the ovum and the spermatozoon have made significant contributions.”

“Microscopically, seminomas are classified as typical, atypical, or spermatocyte.”

“The primary spermatocyte is the largest of the germ cells in the tubule, and the various stages are distinguished based on the degree of chromosome coiling.”

“Spermatogonia are the mitotic germ cells of the testis from which sperm arise by spermatogenesis.”

“In principle, non-disjunction during spermatogenesis could lead to aneuploidy, which might cause fetal death.”

“This small protein replaces histones and binds DNA in the process of spermatogenesis.”

“Feminists of the era did not take kindly to Ericsson and his Marlboro Man veneer. To them, the lab cowboy and his sperminator portended a dystopia of mass-produced boys.”

“The cap is used with a spermicide, which is an agent that chemically destroys sperm.”

“In India it has been used for millennia as an insect repellent, spermicide, medicine for skin diseases, sores and rheumatism.”

“At the four-week and final visits, questionnaires about the acceptability of the spermicide were completed.”

“As daughter cells of spermatogonia, the primary spermatocytes reside just apical to the layer of spermatogonia.”

“The primitive germinal cells are the spermatogonia, which lie peripherally in the tubule wall, outside the barrier of Sertoli cell junctions.”

“Spermatogonia are the mitotic germ cells of the testis from which sperm arise by spermatogenesis.”

“When a female is inseminated with spermatozoa from an allospecific male, his spermatozoa successfully fertilize the eggs.”

“However, it is clear that only a small fraction of the spermatids develop into mature spermatozoa in males.”

“Interspersed among the spermatozoa are what appear to be the cytoplasmic contents of degraded cells.”

“As daughter cells of spermatogonia, the primary spermatocytes reside just apical to the layer of spermatogonia.”

“A primary spermatogonium surrounded by a pair of cyst cells undergoes four mitotic divisions, forming a cyst of 16 primary spermatocytes.”

“In sexual reproduction, spermatocytes develop from the transformation of choanocytes, and oocytes arise from archeocytes.”

“The presence of spermatozoids was considered indicative of pregnancy, associated with the diagnosis of the estrous phase of the estral cycle.”

“Since 1992, flow cytometry is used to differentiate between X and Y spermatozoids according to DNA content.”

“We could not detect any alteration in the form of the spermatids and spermatozoids.”

“Common commodities such as honey and sodium bicarbonate, acidic fruit juices and oils have been used through history as spermicides.”

“Honey, pepper, and even animal dung were tried as spermicides or diaphragms.”

“As they are used in conjunction with spermicides, some people find them a messy contraception method.”