ANSC 4090 - Basic Repro Anatomy and Phys Notes

Different cell composition, different secretions, and differing functions in reproductive systems.
Cessation of early embryo development often occurs at the uterus, specifically at early stages or early classes of development.

Artificial Insemination:
- In certain species, particularly those with difficult cervices, artificial insemination may be performed in the oviduct.
Surgical Techniques:
- In many wild species, embryo recovery often necessitates minor surgeries for successful retrieval.
- It is generally easier to recover embryos from the oviduct than from the uterus due to the uterus's larger space, providing a more conducive environment for locating small structures.

Techniques include needle incisions; however, these methods can be more invasive.

Ovaries have numerous functions:
- Polycystic Formation:
- This leads to recruitment of follicles for development.
- Initiates the follicular pathway leading to ovulation.
- The key processes in the ovary include:
- Activation of follicles.
- Maturation and release of oocytes.
The ovary also regulates reproduction by producing:
- Estrogen and Progesterone, key hormones that regulate the reproductive cycle.

Images can illustrate the physical characteristics of ovaries.
- A normal ovary can be identified easily through imaging.
- An example is shown of a human ovary with its dominant follicle clearly marked.
Polycystic Ovarian Syndrome (PCOS):
- An image illustrates the appearance of an ovary affected by PCOS.

Superovulation Monitoring:
- Ultrasound is useful to observe the follicular response to Follicle-Stimulating Hormone (FSH).
- Multiple growing follicles indicate a positive response to FSH treatment.
Ovarian Reserve Measurement:
- Ovarian reserve refers to the number of follicles capable of developing in each cycle.
- For instance, a desirable outcome is the production of multiple follicles (e.g., 20 instead of 3) in response to stimulation, indicating better reproductive capacity.

Follicular Development Tracking:
- Regular monitoring through ultrasound on different days offers insights into follicle growth and overall reproductive health.
The size of the ovary increases as follicles develop throughout the menstrual cycle.

Tracking the development of follicles is crucial for:
- Predicting optimal times for breeding or artificial insemination.
In wild species where hormone level data is scant, developing protocols to understand hormone levels is vital in assessing reproductive health.

The dominant follicle size is a significant indicator of ovulation timing:
- For horses:
- Optimal ovulation size is approximately 35 mm.
- For cows:
- Optimal ovulation size is about 15 mm.
Fertility Challenges:
- Captive wild animals and older individuals often experience fertility issues. Higher semen quantities do not guarantee success and can initiate an immune response, complicating conception.
- The timing of insemination is more critical than quantity.

Follicle size is indicative of when ovulation will occur (e.g., follicle size of 35 mm in horses suggests ovulation will happen in approximately 12 hours).
Additionally, uterine secretions must be assessed:
- High-quality secretions indicate compatibility for breeding.
- A round but changing shape of the follicle signifies that ovulation is imminent.
These concepts apply across species, maintaining their relevance through the biological diversity of reproductive systems.

Importance of comprehensive assessment before any breeding procedures, which includes evaluating the health of both the ovary and uterus alongside follicle development and hormone presence.
More studies may be required for continuous advancement in reproductive management across diverse animal species.