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Questions and Answers
What is the duration of oestrus in cows?
14 to 24 hours.
What is the average gestation length for a ewe?
147 days.
Which hormone is responsible for stimulating the synthesis of LH and FSH?
Gonadotropin Releasing Hormone (GnRH).
How long does oestrus last in sows?
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Where does fertilization occur in cows?
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What is the primary role of the uterus during gestation?
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What hormone primarily causes ovulation in cows?
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What is the function of the cervix in a cow's reproductive system?
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How does artificial insemination assist in genetic improvement of bovine herds?
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What is a major disadvantage of artificial insemination related to expertise?
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Study Notes
Oestrus and Gestation
- Oestrus in cows lasts between 14 to 24 hours.
- Ewes have a gestation length of 147 days.
- Average gestation period for cows is 283 days.
Hormones and Fertilization
- Gonadotropin Releasing Hormone (GnRH) from the hypothalamus stimulates the production of LH and FSH.
- Luteinizing hormone (LH) is the primary hormone inducing ovulation in cows.
- Fertilization in cows occurs in the oviducts.
Uterus and Cervix Functions
- The uterus provides nourishment and protection for the embryo and fetus during gestation.
- The cervix serves as a barrier to prevent infections in the reproductive tract.
Role of Progesterone
- Progesterone (P4) is essential for maintaining pregnancy during the bovine oestrous cycle.
Artificial Insemination
- Sperm is deposited in the vagina during artificial insemination.
- AI allows for genetic improvement by using superior genetics from top bulls, enhancing traits like milk production and disease resistance.
- Artificial insemination is cost-effective as it negates the need for bull maintenance, reducing expenses related to feeding, housing, and veterinary care.
- AI lowers the risk of sexually transmitted diseases compared to natural mating, promoting herd health.
- Relying heavily on selected bulls can reduce genetic diversity, posing risks of inbreeding.
Herd Health Management
- Uses of artificial insemination help manage herd health by minimizing disease transmission risks associated with natural mating.
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Description
Test your knowledge on animal reproduction with these short answer questions. Covering topics like oestrus duration and gestation periods in cows, ewes, and sows, this quiz will challenge your understanding of reproductive hormones and processes.
