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GH & PL are important for early division of spermatogonia.

Spermatogenesis needs an optimum temperature of 32°C

The diet should include vitamens A , B , C , E, and protiens, selenium, zinc which are vital for spermatogenisis.

Puberty= adolescence

Thelarche: development of breasts

Pubarche: development of axillary and pubic hair

Menarche: start of the first menstrual period

Growth spurt: it is the linear growth velocity in cm/year.

Adrenarche: it id an increase in secretion of the adrenal androgens. It occurs without any change in the secretion of the ACTH or cortisol.

Leptin is secreted by Fat cells

Oocyte maturity inhibiting factor is secreted by The follicular epithelium

Thecal cells are in the ovarian stroma

Follicular cells are stimulated to mature by FSH

pregnancy and lactation are the only things that interrupt the ovarian cycle.

Granulosa cells in the primary follicle connected to oocyte via gap junction and secret glycoproteins forming a clear layer called Zona pellucida

The fluid in the secondary follicle is secreted by granulosa cells

The dominant follicle appears at day 6

Primary oocye + granulosa cells= Corona Radiata