Compare and contrast the processes of oogenesis and spermatogenesis.

 
Spermatogenesis
•   The entire process, starting with the spermatogonial cell and ending with sperm, takes about 64 days.
•   The process begins at puberty and continues into old age.
•   The spermatogonia have been dormant in the seminiferous tubules since the fetal period. These begin to increase in number at puberty by mitosis. They will grow and undergo gradual changes that transform them into primary spermatocytes, the largest germ cells in the tubules.

(Before Birth) Spermatogonial Cell 2n ? (Puberty-Old Age) Primary spermatocyte 2n ? Secondary spermatocyte n ? Spermatid n ? (Spermiogenesis) Sperm n


Oogenesis
•   The term oogenesis=  oogonia ? mature ova.
•   This maturation process begins before birth, but it is not completed until after puberty.
•   During early fetal life, oogonia proliferate by mitotic division. All oogonia enlarge to form primary oocytes before birth. No more will be made after birth.
•   Before birth occurs, the primary oocytes begin the first meiotic division. The completion does not occur until after puberty. The primary oocytes are suspended in prophase until puberty (OMI)
•   After puberty, a primary oocyte will complete the first meiotic division. The division of the cytoplasm is unequal. The secondary oocyte receives the most cytoplasm and the first polar body receives hardly any. The first polar body is a small, nonfunctional cell that soon degenerates.
•   At ovulation, the nucleus of a secondary oocyte begins the second meiotic division, and progresses only to metaphase 2, when division is arrested. If a sperm penetrates the secondary oocyte, the second meiotic division is completed, and most cytoplasm is again retained by one cell, the oocyte. The oocyte is mature when the second polar body is extruded. The mature oocyte is commonly referred to as the mature ovum.

(Before Birth) Oogonial Cell 2n ? (Before Birth) Primary oocyte 2n w/primordial follicle ? (Puberty) Primary oocyte w/ primary follicle then secondary follicle ? primary oocyte w/ Zona Pellucida & Secondary/Growing Follicle ? (After Puberty) Secondary oocyte w/ Graafian Follicle (1st Meiotic Div) - - - -  ?  ( Held in Metaphase 2 at Ovulation) if Sperm penetrates cytoplasm then ? Mature Ovum

Don't know if that helps and all of those question marks are suppose to be arrows

Spermatogenesis occurs in males and oogenesis occurs in females. The process spermatogenesis begins at puberty and continues into old age while the process of oogenesis's maturation process begins before birth, but if not complete until after puberty. In spermatogenesis,  spermatogonia begin dividing by mitosis at puberty and in oogenesis, ooginia begin dividing by mitosis (producing primary oocytes) while the female is still a fetus. Sperm are produced in the human male from puberty throughout  adult life while oocytes complete meiosis 1 every month after puberty.