Axis

Males

Females

Hypothalamus

Kisspeptin Level [2]

+

+++

Activity [3]

GnRH pulsatile

GnRH pulsatile and GnRH surge

Feedback [4]

Negative by Testosterone

Positive by estradol

Negative by estradiol and progesterone

Pituitary

Size [5]

Smaller size

Bigger size

LH surge [2]

Absence

Exist

Feedback [6]

Negative by Testosteron

Positive by estradiol

Negative by estradiol and progesterone

Gonads [7,8]

Organ

Testis

Ovary

Location

Inside scrotum

Inside pelvic

Gonadal process

Spermatogenesis

Oogenesis

Main unit

Seminiferous tubule

Follicle

Activity

Continuous

Periodically

Duration of process

72 days

28-35 days

End product

Sperm

Oocyte

Amount of product

Numerous

1-2 oocyte release

Hormones

Testosteron

Estrogen and Progesteron

LH receptor location

Leydig Cells

Internal theca cells, Granulosa cells

Puberty sign

Nocturnal emission

Menarche (first menstruation)

Gametogenesis

Continuous

Periodical ovulation until menopause