🎧 New: AI-Generated Podcasts Turn your study notes into engaging audio conversations. Learn more

Fertility and Breeding time
45 Questions
1 Views

Fertility and Breeding time

Created by
@DelightfulPink

Podcast Beta

Play an AI-generated podcast conversation about this lesson

Questions and Answers

During oestrus, the female becomes sexually receptive to the male. This is typically preceded by a period of pro-oestrus and/or other clinical signs. What is the classic sign of oestrus in cows?

  • The female shows interest in the male (correct)
  • The female starts nesting behavior
  • The female becomes more aggressive towards the male
  • The female starts grooming the male
  • When does oestrus occur in most animals?

  • After parturition/lactational anoestrus
  • After seasonal anoestrus
  • During the follicular phase (correct)
  • During the luteal phase
  • Which hormone drives oestrus by increasing oestradiol concentrations?

  • Testosterone
  • Oxytocin
  • Luteinizing hormone (correct)
  • Progesterone
  • In which species does oestrus occur without being preceded by the luteal phase?

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

    In cows and sows, how long does oestrus typically last?

    <p>1-2 days</p> Signup and view all the answers

    In which species is the length of oestrus increased and often not linked to when she first showed signs of oestrus?

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

    When does ovulation typically occur in cows and sows?

    <p>At the end or just after the end of oestrus</p> Signup and view all the answers

    What is the main goal when timing mating in relation to oestrus?

    <p>To ensure successful mating</p> Signup and view all the answers

    When does oestrus occur in relation to the oestrous cycle?

    <p>At the beginning of the follicular phase</p> Signup and view all the answers

    What is the role of oestradiol in driving oestrus?

    <p>To promote follicle development</p> Signup and view all the answers

    Which hormone is most commonly used for monitoring oestrus and ovulation in animals?

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

    What hormone triggers the LH surge and subsequently ovulation?

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

    Which hormone is the ideal hormone to measure for predicting optimal chances of pregnancy in humans?

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

    What is the optimal time to mate the female animal?

    <p>Shortly before ovulation</p> Signup and view all the answers

    What is the period when oocytes are available to be fertilized by sperm in most species?

    <p>Immediately after ovulation</p> Signup and view all the answers

    What is the period when mating could result in pregnancy?

    <p>During oestrus</p> Signup and view all the answers

    What is the main clinical tool for monitoring oestrus and ovulation in large animals?

    <p>Monitoring ovarian structures by ultrasonography</p> Signup and view all the answers

    What is the expected size of an antral follicle in a cow when monitoring oestrus and ovulation?

    <p>Between 10-20 mm</p> Signup and view all the answers

    What is the expected size of a follicle in a mare when monitoring oestrus and ovulation?

    <p>Between 40-50 mm</p> Signup and view all the answers

    What does the rise in progesterone in a dog indicate?

    <p>Ovulation is imminent</p> Signup and view all the answers

    Which of the following is a key indicator that ovulation is imminent in mares?

    <p>The follicular wall will thicken</p> Signup and view all the answers

    What is the characteristic change in cervix and uterus under progesterone dominance in the mare?

    <p>Cervix is hard and narrow, uterus is smaller with increased tone</p> Signup and view all the answers

    What is the characteristic change in cervix and uterus under oestrogen dominance in the cow?

    <p>Cervix is narrow and tense, uterus is oedematous with increased tone</p> Signup and view all the answers

    What is the characteristic change in cervix and uterus under progesterone dominance in the cow?

    <p>Cervix is flaccid and soft, uterus is flaccid with reduction in tone</p> Signup and view all the answers

    What is the characteristic change in vaginal cytology during late oestrus in dogs?

    <p>Majority of cells are large intermediate cells that are anuclear and cornified</p> Signup and view all the answers

    What is the purpose of pharmacologically controlling the time of ovulation in cows?

    <p>To time mating/artificial insemination accordingly</p> Signup and view all the answers

    What is the hormone that directly induces ovulation in cows?

    <p>HCG (LH activity)</p> Signup and view all the answers

    What is the commonly used method for controlling ovulation in cattle?

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

    What type of cells are largely seen in vaginal cytology during prooestrus in dogs?

    <p>Parabasal or small intermediate cells</p> Signup and view all the answers

    What is the characteristic change in follicular morphology as ovulation approaches?

    <p>It loses its turgidity and becomes more irregular in shape</p> Signup and view all the answers

    What are the key indicators that ovulation is imminent in mares?

    <p>Follicular shape changes, follicular wall thickens (luteinizes), and uterine tonicity changes throughout the cycle.</p> Signup and view all the answers

    What are the characteristic changes in cervix and uterus under oestrogen dominance in the mare?

    <p>Cervix is broad and soft, uterus is larger and oedematous.</p> Signup and view all the answers

    What are the characteristic changes in cervix and uterus under progesterone dominance in the mare?

    <p>Cervix is hard and narrow, uterus is smaller with increased tone.</p> Signup and view all the answers

    What are the characteristic changes in cervix and uterus under oestrogen dominance in the cow?

    <p>Cervix is narrow and tense, uterus is oedematous with increased tone.</p> Signup and view all the answers

    What are the characteristic changes in cervix and uterus under progesterone dominance in the cow?

    <p>Cervix is flaccid and soft, uterus is flaccid with reduction in tone.</p> Signup and view all the answers

    What are some considerations for the optimal time to mate male animals?

    <p>Introduction of a specific (high value) male, controlled mating through artificial insemination, monitoring for oestrus signs, synchronizing ovulation, and optimizing genetics for the offspring.</p> Signup and view all the answers

    What is the importance of the pre-ovulatory follicle growth maturation period in female animals?

    <p>It maximizes the production of oestradiol and ensures that the egg is fully mature, increasing the chances of fertilization.</p> Signup and view all the answers

    When can oocytes be fertilized in most species?

    <p>Oocytes can be fertilized immediately after ovulation, typically for a few hours, but in dogs it can be days due to the need for myosis.</p> Signup and view all the answers

    What are some clinical tools available for monitoring oestrus and ovulation?

    <p>Monitoring hormones like progesterone, oestradiol, GnRH, and LH can provide insights into the timing of oestrus and ovulation.</p> Signup and view all the answers

    What are some key indicators of ovulation in large animals?

    <p>Monitoring the ovaries through ultrasonography, checking for the presence of an active corpus luteum (CL), and assessing the size of follicles can help determine the timing of ovulation.</p> Signup and view all the answers

    Fertility and Breeding time: Oestrus is when the female becomes sexual receptive to the male. Can be preceded by a period of pro-oestrus and/or other clinical signs. What is the classic sign of oestrus in cows?

    <p>The classic sign of oestrus in cows is when the female 'stands to be mate by the male'.</p> Signup and view all the answers

    When does oestrus occur in dogs?

    <p>In dogs, oestrus is not preceded by the luteal phase and occurs after lactational anoestrus.</p> Signup and view all the answers

    What is the difference in oestrus and time of ovulation across species?

    <p>The timing of oestrus and ovulation varies across species.</p> Signup and view all the answers

    Which species have a relatively similar pattern of oestrus and ovulation?

    <p>Cows and sows have a relatively similar pattern of oestrus and ovulation.</p> Signup and view all the answers

    In which species is the timing of oestrus and ovulation difficult to predict?

    <p>In mares and bitches, the timing of oestrus and ovulation is difficult to predict.</p> Signup and view all the answers

    More Quizzes Like This

    Animal Reproduction Quiz
    5 questions

    Animal Reproduction Quiz

    NoiselessRainforest avatar
    NoiselessRainforest
    Animal Reproduction 1.3
    58 questions
    Animal Reproduction SAQs
    42 questions

    Animal Reproduction SAQs

    PrudentRainforest avatar
    PrudentRainforest
    Animal Reproduction SAQ's
    10 questions

    Animal Reproduction SAQ's

    PrudentRainforest avatar
    PrudentRainforest
    Use Quizgecko on...
    Browser
    Browser