a) Normal eupyrene spermatozoon
; (b) abnormal eupyrene spermatozoon
A recent meta-analysis suggested that, compared with overnight coincubation, a short period of spermatozoon
and oocyte coincubation provides more satisfactory IVF outcomes .
In general, the teleost spermatozoon
is anacrosomal, has a head with a small ovoid or spherical nucleus, and a short midpiece containing one or few mitochondria (Fig.
The value is obtained from the direct observation of three dimensional component of the flagellar movement of spermatozoon
held by its head with a micropipette.
of the African Catfish: Fine Structure, Motility, Viability and Its Behaviour in Seminal Vesicle Secretion.
Acrosome length and nuclear diameter ([micro]m) of the spermatozoon
of Chilean mussels (Mytilus chilensis), M.
Pregnancies after intracytoplasmic injection of single spermatozoon
into an oocyte.
The morphological aberrations observed in this study indicated that Group A had a total abnormal spermatozoon
of 137, Group B had 158 and Group C had 198.
Describe how a spermatozoon
and oocyte encounter each other in the female reproductive tract.
The final step in the process, termed spermiogenesis, is the conversion of the haploid spermand to a polarized, flagellated, motile spermatozoon
, typically referred to as a sperm.
It appears that each spermatozoon
possesses a short round head, few mitochondria and underdeveloped middle piece.
16) concluded that it is the effect of the oocyte rather than the spermatozoon
that influences embryo quality.
Mitochondria increase in size and migrate to the basal pole, giving rise, along with the centriole, to the spermatozoon
A reconstruction of a section of a mature spermatozoon
is given in Fig.
can easily pass through the 'net' that is formed by the condom.