Animal Reproduction 1.2
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Questions and Answers

At what stage do the reproductive organs become functional?

  • Fertilization
  • Parturition
  • Oestrus
  • Puberty (correct)

    • Which cycle occurs repeatedly when pregnancy does not occur?

  • Fertilization cycle
  • Menstrual cycle
  • Oestrous cycle (correct)
  • Reproductive cycle

    • What is the only real male contribution to the reproduction process?

  • Nutrients
  • Egg
  • Sperm (correct)
  • Hormones

    • What is the act of giving birth?

    <p>Parturition</p> Signup and view all the answers

    What is the length of time of pregnancy?

    <p>Gestation</p> Signup and view all the answers

    What is the term for the period of receptivity to mating in the female reproductive cycle?

    <p>Oestrus</p> Signup and view all the answers

    During which stage of the reproductive process do the egg and sperm unite?

    <p>Fertilization</p> Signup and view all the answers

    What is the primary purpose of the Oestrous cycle?

    <p>To induce receptivity to mating when pregnancy does not occur</p> Signup and view all the answers

    What is the relationship between the Oestrous cycle and pregnancy?

    <p>The Oestrous cycle occurs repetitively when pregnancy does not occur</p> Signup and view all the answers

    What is the significance of puberty in the reproductive process?

    <p>It is the age at which reproductive organs become functional</p> Signup and view all the answers

    What is the primary function of the female reproductive cycle?

    <p>To prepare for fertilization and gestation</p> Signup and view all the answers

    What is the significance of the Oestrous cycle in the absence of pregnancy?

    <p>It allows the reproductive cycle to repeat</p> Signup and view all the answers

    What is the result of the union of the egg and sperm?

    <p>The formation of the zygote</p> Signup and view all the answers

    What is the role of the male in the reproductive process?

    <p>To provide sperm for fertilization</p> Signup and view all the answers

    What is the purpose of the Oestrous cycle in the reproductive process?

    <p>To prepare the female for fertilization and gestation</p> Signup and view all the answers

    What is the age range of puberty in horses?

    <p>12 to 15 Months</p> Signup and view all the answers

    Which animal has the longest puberty period?

    <p>Human</p> Signup and view all the answers

    What is the age range of puberty in sheep?

    <p>5 to 7 Months</p> Signup and view all the answers

    What percentage of mature weight do animals typically reach at puberty?

    <p>70-75%</p> Signup and view all the answers

    What is the age range of puberty in swine?

    <p>4 to 8 months</p> Signup and view all the answers

    Which animal has the shortest puberty period?

    <p>Rabbit</p> Signup and view all the answers

    What is the age range of puberty in dogs?

    <p>6 to 14+ months</p> Signup and view all the answers

    At what age range do humans typically reach puberty?

    <p>9 to 16 years</p> Signup and view all the answers

    What percentage of mature weight do cattle typically reach at puberty?

    <p>70-75%</p> Signup and view all the answers

    Which animal reaches puberty within the shortest time frame?

    <p>Sheep</p> Signup and view all the answers

    What is the age range of puberty in cattle?

    <p>6 to 12 months</p> Signup and view all the answers

    Which animals have a longer puberty period than humans?

    <p>Horses</p> Signup and view all the answers

    What percentage of mature weight do animals typically reach at puberty?

    <p>70-75%</p> Signup and view all the answers

    Which animal has a puberty period that can exceed 14 months?

    <p>Dogs</p> Signup and view all the answers

    What is the term for the stage of the oestrous cycle when the corpus luteum is formed from the follicle that houses the ovary?

    <p>Metoestrus</p> Signup and view all the answers

    What is the stage of the oestrous cycle characterized by the swelling of the vulva and the presence of a bloody discharge?

    <p>Pro-oestrus</p> Signup and view all the answers

    What is the term for the period of time when the sexual cycle is inactive?

    <p>Anoestrus</p> Signup and view all the answers

    What is the acronym that stands for the stages of the oestrous cycle?

    <p>POMDA</p> Signup and view all the answers

    What is the purpose of the corpus luteum during the Metoestrus stage?

    <p>To secrete hormones that help the uterine wall thicken</p> Signup and view all the answers

    What occurs during the Oestrus stage?

    <p>Ovulation and acceptance of the male for mating</p> Signup and view all the answers

    What is the primary function of the corpus luteum during the Metoestrus stage?

    <p>To thicken the uterine wall for the egg to attach</p> Signup and view all the answers

    What is the stage of the oestrous cycle characterized by maximum corpus luteum function?

    <p>Dioestrus</p> Signup and view all the answers

    What can induce the Anoestrus stage?

    <p>Time of year, pregnancy, lactation, significant illness, chronic energy deficit, and age</p> Signup and view all the answers

    What is the result of the decrease in corpus luteum function during the Dioestrus stage?

    <p>Pseudo-pregnancy is terminated</p> Signup and view all the answers

    What type of oestrous cycle do cattle, pigs, cats, and rabbits exhibit?

    <p>Polyestrous cycle continuously with no anoestrus</p> Signup and view all the answers

    Which animals exhibit a seasonal polyestrous cycle?

    <p>Sheep and horses</p> Signup and view all the answers

    How often do dogs exhibit a monoestrous cycle?

    <p>Every six months</p> Signup and view all the answers

    How long are dogs attracted to females during their monoestrous cycle?

    <p>18 days</p> Signup and view all the answers

    For how long are females attracted to males during their monoestrous cycle?

    <p>Half the time of males</p> Signup and view all the answers

    What type of oestrous cycle do cattle, pigs, cats, and rabbits exhibit?

    <p>Continuous polyestrous</p> Signup and view all the answers

    Which animals exhibit a seasonal polyestrous cycle?

    <p>Sheep and horses</p> Signup and view all the answers

    How often do dogs exhibit a monoestrous cycle?

    <p>Biannually</p> Signup and view all the answers

    For how long are dogs attracted to females during their monoestrous cycle?

    <p>18 days</p> Signup and view all the answers

    For how long are females attracted to males during their monoestrous cycle?

    <p>Half the time of the males</p> Signup and view all the answers

    Study Notes

    Events of Reproduction

    • Puberty is the age at which reproductive organs become functional.

    Female Reproductive Cycle

    • The reproductive process occurs within the Oestrous cycle, a repetitive cycle that occurs when pregnancy does not.
    • Oestrus refers to the "heat" or receptivity to mating.

    Conception and Pregnancy

    • Fertilization occurs when the egg and sperm unite.
    • The only real male contribution to reproduction is the sperm.

    Pregnancy and Birth

    • Gestation refers to the length of time of pregnancy.
    • Parturition is the act of giving birth.

    Events of Reproduction

    • Puberty is the age at which reproductive organs become functional.

    Female Reproductive Cycle

    • The reproductive process occurs within the Oestrous cycle, a repetitive cycle that occurs when pregnancy does not.
    • Oestrus refers to the "heat" or receptivity to mating.

    Conception and Pregnancy

    • Fertilization occurs when the egg and sperm unite.
    • The only real male contribution to reproduction is the sperm.

    Pregnancy and Birth

    • Gestation refers to the length of time of pregnancy.
    • Parturition is the act of giving birth.

    Events of Reproduction

    • Puberty is the age at which reproductive organs become functional.

    Female Reproductive Cycle

    • The reproductive process occurs within the Oestrous cycle, a repetitive cycle that occurs when pregnancy does not.
    • Oestrus refers to the "heat" or receptivity to mating.

    Conception and Pregnancy

    • Fertilization occurs when the egg and sperm unite.
    • The only real male contribution to reproduction is the sperm.

    Pregnancy and Birth

    • Gestation refers to the length of time of pregnancy.
    • Parturition is the act of giving birth.

    Age of Puberty in Different Species

    • Cattle reach puberty between 6 to 12 months of age.
    • Sheep enter puberty between 5 to 7 months old.
    • Swine become pubescent between 4 to 8 months of age.
    • Horses reach puberty at 12 to 15 months old.
    • Dogs enter puberty between 6 to 14+ months of age.
    • Cats reach puberty between 5 to 10 months old.
    • Rabbits become pubescent between 4 to 8 months of age.

    Age of Puberty in Humans

    • Humans reach puberty between 9 to 16 years old, achieving approximately 70-75% of their mature weight during this period.

    Age of Puberty in Different Species

    • Cattle reach puberty between 6 to 12 months of age.
    • Sheep enter puberty between 5 to 7 months old.
    • Swine become pubescent between 4 to 8 months of age.
    • Horses reach puberty at 12 to 15 months old.
    • Dogs enter puberty between 6 to 14+ months of age.
    • Cats reach puberty between 5 to 10 months old.
    • Rabbits become pubescent between 4 to 8 months of age.

    Age of Puberty in Humans

    • Humans reach puberty between 9 to 16 years old, achieving approximately 70-75% of their mature weight during this period.

    Age of Puberty in Different Species

    • Cattle reach puberty between 6 to 12 months of age.
    • Sheep enter puberty between 5 to 7 months old.
    • Swine become pubescent between 4 to 8 months of age.
    • Horses reach puberty at 12 to 15 months old.
    • Dogs enter puberty between 6 to 14+ months of age.
    • Cats reach puberty between 5 to 10 months old.
    • Rabbits become pubescent between 4 to 8 months of age.

    Age of Puberty in Humans

    • Humans reach puberty between 9 to 16 years old, achieving approximately 70-75% of their mature weight during this period.

    Oestrus Cycle

    • The acronym for the oestrus cycle is POMDA, which stands for Pro-oestrus, Oestrus, Metoestrus, Dioestrus, and Anoestrus.

    Pro-oestrus

    • Occurs before heat (oestrus)
    • Characterized by:
      • Vulva swelling
      • Bloody discharge
      • Attraction to males, but no mating

    Oestrus

    • Also known as heat
    • Ovulation occurs
    • Female accepts males for mating

    Metoestrus

    • Oestrus ends
    • Corpus luteum (CL) forms from the follicle that houses the ovary
    • CL secretes hormones, such as progesterone, that:
      • Thicken the uterine wall
      • Prepare for egg attachment

    Dioestrus

    • Maximum CL function occurs if pregnant
    • CL produces progesterone, maintaining a thickened uterine wall
    • Pseudo-pregnancy terminates with a decrease in CL function (uterine wall thinning)

    Anoestrus

    • The sexual cycle is at rest
    • Induced by:
      • Time of year
      • Pregnancy
      • Lactation
      • Significant illness
      • Chronic energy deficit
      • Possibly age

    Oestrus Cycle

    • The acronym for the oestrus cycle is POMDA, which stands for Pro-oestrus, Oestrus, Metoestrus, Dioestrus, and Anoestrus.

    Pro-oestrus

    • Occurs before heat (oestrus)
    • Characterized by:
      • Vulva swelling
      • Bloody discharge
      • Attraction to males, but no mating

    Oestrus

    • Also known as heat
    • Ovulation occurs
    • Female accepts males for mating

    Metoestrus

    • Oestrus ends
    • Corpus luteum (CL) forms from the follicle that houses the ovary
    • CL secretes hormones, such as progesterone, that:
      • Thicken the uterine wall
      • Prepare for egg attachment

    Dioestrus

    • Maximum CL function occurs if pregnant
    • CL produces progesterone, maintaining a thickened uterine wall
    • Pseudo-pregnancy terminates with a decrease in CL function (uterine wall thinning)

    Anoestrus

    • The sexual cycle is at rest
    • Induced by:
      • Time of year
      • Pregnancy
      • Lactation
      • Significant illness
      • Chronic energy deficit
      • Possibly age

    Oestrous Cycles

    • Polyestrous cycles occur continuously with no anoestrus (period of sexual inactivity) in cattle, pigs, cats, and rabbits.
    • In polyestrous cycles, females can breed multiple times in a year.

    Seasonal Polyestrous

    • In seasonal polyestrous cycles, a period of continuous breeding cycles is followed by a period of anoestrus (sexual inactivity).
    • This type of cycle is controlled by temperature or light and is seen in sheep and horses.

    Monoestrous Cycles

    • Monoestrous cycles occur only once in a time period, such as every year or every six months.
    • Dogs exhibit biannual monoestrous cycles, meaning they breed every six months.

    Canine Breeding Cycles

    • Male dogs are attracted to females in heat for 18 days.
    • Female dogs are attracted to males for half the time it takes males to be attracted to them.

    Oestrous Cycles

    • Polyestrous cycles occur continuously with no anoestrus (period of sexual inactivity) in cattle, pigs, cats, and rabbits.
    • In polyestrous cycles, females can breed multiple times in a year.

    Seasonal Polyestrous

    • In seasonal polyestrous cycles, a period of continuous breeding cycles is followed by a period of anoestrus (sexual inactivity).
    • This type of cycle is controlled by temperature or light and is seen in sheep and horses.

    Monoestrous Cycles

    • Monoestrous cycles occur only once in a time period, such as every year or every six months.
    • Dogs exhibit biannual monoestrous cycles, meaning they breed every six months.

    Canine Breeding Cycles

    • Male dogs are attracted to females in heat for 18 days.
    • Female dogs are attracted to males for half the time it takes males to be attracted to them.

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    Description

    This quiz covers the basics of human reproduction, including puberty, the female reproductive cycle, conception, pregnancy, and birth.

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