Puberty Flashcards
Female becomes sexually mature and able to reproduce
Puberty
T/F Puberty precedes the development of physical maturity
T
At wage age does pygmy goats reach puberty
3 months
Time mares reach the age of puberty
1-2 years
Time cows reach the age of puberty
7-18 months
Time ewes reach the age of puberty
6-15 months
Time doe or nanny goat reach the age of puberty
4-8 months
Time sows reach the age of puberty
6-8 months
Time bitch reach the age of puberty
6-20 months
Time queen cat reach the age of puberty
7-12 months
The initiation of puberty is a function of
age & maturity
Onset of puberty is signaled by
1st estrous or 1st ovulation
At what stage does cows ovulate?
Metestrus
Non seasonal polycyclic animals
cow and sow
Seasonal polycyclic animals
mare
ewe
doe/nanny
cat
T/F Domestic animals experience menopause
False
T/F Ewes are short day breeders
True
T/F cats are interrupted by sexual quiescence
True
Seasonally Monocyclic animal
Bitch
What causes the changes during puberty?
- production of female gametes
- synthesis of hormones
Pituitary gland produces what hormone?
Luteinizing Hormone
Theca Cells produce what hormone?
progesterone
Granulosa cells produce what hormone?
Estrogen
Puberty onset relies on the secretion of o__ o__
ovarian oestradiol
Puberty in males occurs as a result of a decrease in hypothalamic sensitivity to __ and ___
E2 and Testosterone
Presence of ___ in semen = puberty
spermatozoa
This hormone influences the release of LH, FSH, & Prolactin
Melatonin
Source of melatonin - gland
Pineal gland
T/F Melatonin is responsive to the amount of daylight
True
This breed is capable of out oof onset breeding
Dorset breed
This hormone influences the release of GnRH
Kisspeptin
External factors affecting puberty (4)
- Nutrition
- Proximity of the male
- Climate
- Disease
This is done in sows to induce hyperovulation
Flushing
___ is secreted by white fat cells
Leptin
