Changes

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|<font color=Purple>Oestrogen</font>

|<font color=Purple>Oestrogen</font>

|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the developing follicles in the ovary to secrete this hormone.

|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes LH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Leydig Cells.

|Promotes development of mammary tissue and is vital for thickening of the endometrium prior to implantation. Oestrogens regulate the [[Female Reproductive Tract -Oestrous Cycle - Anatomy & Physiology|Oestrus Cycle]].

|This hormone controls and maintains the growth and functions of the reproductive organs. It enhances libido and is essential for spermatogenesis.

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|<font color=Purple>Progesterone</font>

|<font color=Purple>Progesterone</font>

|Sertoli Cells

|This is produced in the Corpus Luteum after ovulation, and also the [[Endocrine System - Placenta - Anatomy & Physiology|Placenta]] during pregnancy.

|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Sertoli Cells.

|Progesterone is sometimes known as the ''hormone of pregnancy''. It converts the endometrium to its secretory stage to prepare for implantation, reduces the immune response within the uterus to allow for acceptance of the conceptus, and decreases contractility of the smooth muscle.

|Prevents secretion of further FSH from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]].

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|<font color=Purple>Inhibin<font>

|<font color=Purple>Inhibin<font>

|Sertoli Cells

|Granulosa Cells

|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Sertoli Cells.

|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Granulosa cells.

|Converted from testosterone, this hormone's function is complex. It may prevent apoptosis of male germ cells.

|Inhibits FSH secretion.

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|<font color=Purple>Relaxin<font>

|<font color=Purple>Relaxin<font>

|Sertoli Cells

|This is produced by the Corpus Luteum towards the end of pregnancy as a result of fetal ACTH production.  

|GnRH from the [[Endocrine System - Hypothalamus - Anatomy & Physiology|Hypothalamus]] causes FSH secretion from the [[Endocrine System - Pituitary Gland - Anatomy & Physiology|Pituitary Gland]] which stimulates the Sertoli Cells.

|Relaxes the cervix and pelvic ligaments in preparation for parturition.

|Converted from testosterone, this hormone's function is complex. It may prevent apoptosis of male germ cells.

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|<font color=Purple>[[Endocrine System - <font>

|<font color=Purple>[[Endocrine System - <font>