Reproductive Cyclicity Flashcards
It is part of Exam 2 and it refers to the cyclicity within animals in order to better understand breeeding
What does Anestrus mean?
period when reproductive cyclicity stops (temporarily)
What is the Estrous cycle?
It refers to the whole reproductive cycle and it means series of predictable reproductive events beginning at estrus and ending at estrus.
What does the estrous cycle allow for females to do? How does it last?
1.It allows non-pregnant females repeated opportunities to get pregnant
2, It is continual throughout adult life (with certain exception of species)
Which animals do not have a continuous estrous cycle as an adult?
Humans, Elephants, Orcas
What are some examples of when an animal is under anestrus?
1.Pregnancy
2.Nursing
3.Season of year
4.Indequate nutrition
5.Stressful environment
6.management conditions
7.pathological conditions
What are other ways to say Estrus?
1.Oestrus
2.Oestrous
3.Oestradiol
What is Estrus?
Period of sexual receptivity (other ways to say it are heat, standing heat, lordosis)
What does the term seasonal animals mean?
It is another way to say “in season?
What are examples of Polyestrus animals?
1.Cattle
2.Swine
3.Rodent
4. Domestic cats
5. Horses
What does it mean to be Polyestrus?
- Means to have uniform, regular cycles throughout year without regard to season
2.Pregnancy Opportunities throughout the year
Which animals are seasonally polyestrous?
1.Sheep
2.Horses
3.Goats
4.Wildcats
Which animals are Monoestrous? (one cycle in a year)
Canines, Foxes, Bears
What does the term seasonal polyestrous mean?
It means clusters of cycles in certain times.
Which animals are examples of short-day breeders?
1.Sheep
2.Goats
3.Elk
4.Deer
When do short-day breeders normally have cycles??
1.They normally have cycles when day length decreases
2. Differences in duration of cyclicity
Which are example of Long-Day breeders?
- Horses
- Wildcats
When do long-day breeders normally have their cycles?
They normally have their cycles when day lengths increase
What species of animals are monoestrus?
1.Dogs
2.Wolves
3.Foxes
4.Bears
What does it mean to be Monoestrus?
1.One cycle per year
2.Duration of estrus lasts several days
3. Domestic canines normally have 3 cycles in 2 years.
What do the peaks of charts normally signify in animals?
The peaks normally signify a cycle
What differs in charts between polyestrus animals and seasonal polyestrus animals (Long day)?
Polyestrus animals have peaks throughout their chart while, seasonal polysestrus (long day) usually have their peaks during spring breeding season.
When it comes to Seasonal short day polyestrus animals, when do they normally cycle?
They normally cycle during Autumn or fall so they have peaks during fall season.
When it comes to monoestrus animals when do they normally have their cyclicity?
Based off the chart of the power point between March-April is when they have their cycle, but I do not think there is a definite month or months.
What are the 2 phases of the estrous cycles called ? Why are they named this?
1.Follicular phase
2.Luteal Phase
3.They are normally named this because it is after their dominant structure on the ovary.