In the technology called MOET, which one of the following hormones is used?
FSH
Understanding MOET and Hormone Usage
The question asks about the specific hormone used in the technology known as MOET. MOET stands for Multiple Ovulation Embryo Transfer. It is a breeding method used primarily in cattle and other livestock to increase the number of offspring produced by genetically superior females in a short period.
The Process of MOET
The MOET process involves several key steps:
- Hormonal Treatment: Superior donor females are treated with hormones to induce superovulation.
- Artificial Insemination (AI): The donor female is inseminated with semen from a superior male.
- Embryo Collection: After a few days, the embryos are collected from the donor female, usually non-surgically.
- Embryo Transfer: The collected embryos are then transferred into surrogate mothers (recipient females) that have synchronized reproductive cycles.
Hormone for Superovulation in MOET
The critical first step, inducing superovulation, involves the use of a specific hormone to stimulate the ovaries to produce multiple follicles, and subsequently, multiple eggs, instead of the usual single egg per cycle.
Which Hormone is Used in MOET?
The hormone primarily used for inducing superovulation in MOET is Follicle-Stimulating Hormone (FSH). FSH is a gonadotropin hormone that stimulates the growth and maturation of ovarian follicles.
Let's look at the options provided:
- LH (Luteinizing Hormone): LH is another gonadotropin. While LH is crucial for triggering ovulation (the release of the egg from the follicle) and the formation of the corpus luteum, it is not the primary hormone used to stimulate the initial development of multiple follicles for superovulation in MOET.
- ACTH (Adrenocorticotropic Hormone): ACTH is produced by the pituitary gland and stimulates the adrenal glands to produce cortisol. It is involved in the stress response and has no direct role in inducing superovulation for MOET.
- FSH (Follicle-Stimulating Hormone): FSH is the hormone responsible for stimulating follicular growth. In MOET, higher doses of FSH are administered to cause more follicles than usual to develop simultaneously, leading to superovulation.
- TSH (Thyroid-Stimulating Hormone): TSH is produced by the pituitary gland and stimulates the thyroid gland to produce thyroid hormones. It is involved in metabolism regulation and has no direct role in reproductive technologies like MOET.
Therefore, Follicle-Stimulating Hormone (FSH) is the hormone used to induce superovulation in MOET technology.
Correct Hormone in MOET
The correct hormone used in MOET for inducing superovulation is FSH.
| Hormone | Primary Role in Reproduction (or Other Function) | Used in MOET Superovulation? |
|---|---|---|
| LH | Triggers ovulation, Luteinization | No (used later in the cycle naturally or sometimes for final maturation/ovulation, but not primary superovulation agent) |
| ACTH | Stimulates adrenal cortex (stress response) | No |
| FSH | Stimulates follicular growth | Yes (primary hormone for superovulation) |
| TSH | Stimulates thyroid gland | No |
Revision Table: Key Hormones
| Hormone | Abbreviation | Produced by | Main Function |
|---|---|---|---|
| Follicle-Stimulating Hormone | FSH | Pituitary gland (anterior) | Stimulates growth of ovarian follicles; stimulates sperm production in males. |
| Luteinizing Hormone | LH | Pituitary gland (anterior) | Triggers ovulation; stimulates corpus luteum formation; stimulates testosterone production in males. |
| Adrenocorticotropic Hormone | ACTH | Pituitary gland (anterior) | Stimulates adrenal cortex to produce glucocorticoids (e.g., cortisol). |
| Thyroid-Stimulating Hormone | TSH | Pituitary gland (anterior) | Stimulates the thyroid gland to produce thyroid hormones (T3, T4). |
Additional Information: Benefits of MOET Technology
MOET technology offers several advantages in animal breeding:
- Accelerated Genetic Progress: Allows superior females to produce many offspring quickly, spreading desirable genes faster.
- Increased Productivity: A single superior donor female can contribute to numerous pregnancies in surrogate mothers within a breeding season.
- International Transfer: Embryos can be transported internationally more easily and cost-effectively than live animals, facilitating the global spread of superior genetics.
- Conservation: Can be used in conservation programs for endangered species.
The success of the superovulation phase using FSH is crucial for the overall efficiency of the MOET procedure.
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