Difference Between Spermatogenesis and
Oogenesis
Charecters
Spermatogensis
Ooenesis
Definition
The production of sperms from The production of eggs from
spermatogonia
is
called oogonia is called oogenesis.
spermatogenesis.
Location
Spermatogenesis occurs inside the Oogenesis occurs inside the
testis in males
ovary in females.
Stages
All the stages of spermatogenesis All the stages of oogenesis,
occur inside the testis.
other than the last stage,
occurs inside the ovary. The
last stage occurs inside the
oviduct.
Releasing
Sperms are released from the Oocytes are released from
testis.
the ovary, which matures
later.
Continuity
Spermatogenesis is a continuous Early stages of the oogenesis
process, occurring after the occurs during the fetal
puberty till death.
period. The rest of the
process occurs after the
puberty. Only one ovum is
produced per month until
menopause.
Spermatogonia/Oogonia
Spermatogonia is developed from Oogonia is developed from
the germinal epithelial lining of the the germinal epithelium,
seminiferous tubules.
which overlays the ovary.
Sertoli Cells
Sertoli cells are found in the No Sertoli cells are found in
germinal
cell
epithelium, the germinal cell epithelium.
supporting the germinal cells.
Cell Division
All spermatogonia are divided by Some of the oogonia divide
meiosis, producing sperms all the during the production of
times.
eggs, one at a time.
Growth Phase
Growth phase is too short in Growth phase is prolonged in
spermatogonia.
oogonia.
Primary Gametocyte
Primary spermatocyte is divided by Primary oocyte is divided by
meiosis 1, forming two secondary meiosis 1, forming a
spermatocytes.
secondary oocyte and one
polar body.
Secondary Gametocyte
Secondary spermatocyte is divided Secondary oocyte is divided
by meiosis 2, forming two by meiosis 2, forming ovum
spermatids.
and one polar body.
Cytokinesis
Equal cytokinesis occurs during Unequal cytokinesis occurs
spermatogenesis,
ultimately during oogenesis, ultimately
producing four sperms.
producing a single ovum and
three polar bodies.
Result
One spermatocyte produces four One oocyte produces only
spermatozoa.
one ovum.
Size
Sperms
are
spermatocyte.
Nucleus
The
nucleus
undergoes No nuclear condensation is
condensation in the sperm.
found in the ovum.
Food Reservation
Little food is reserved in the A
lot
of
food
and
sperm.
biochemicals are reserved in
the ovum.
Motility
Spermatogenesis produces motile Oogenesis produces
gametes.
motile gametes.
smaller
than Ovum is larger than the
oocyte.
non-