Embryo Transfer Course

Lesson 1 • Female Reproductive Anatomy Overview

Covers ovarian, uterine, and cervical structures in donor and recipient species. Provides the anatomical baseline required for all subsequent hands-on techniques.

Lesson 2 • Hormonal Control of the Estrous Cycle

Explains GnRH, FSH, LH, estrogen, and progesterone interactions across cycle phases. Links hormonal patterns to timing decisions in superovulation protocols.

Lesson 3 • Species-Specific Reproductive Differences

Compares cycle length, gestation, and anatomy across cattle, horses, sheep, and goats. Prepares students to adapt protocols when working with multiple species.

Lesson 4 • Early Embryo Development Stages

Traces cleavage, compaction, blastulation, and hatching from fertilization to transfer-ready stage. Establishes the developmental benchmarks used in embryo grading.

Lesson 1 • Superovulation Hormone Protocols

Details FSH and eCG dosing schedules, injection intervals, and luteolysis timing. Students learn to customize protocols based on species and individual donor response.

Lesson 2 • Donor Nutrition and Stress Management

Examines how body condition score, diet, and handling stress affect superovulatory response. Integrates management practices that protect embryo yield and donor welfare.

Lesson 3 • Follicular Response Monitoring

Teaches transrectal ultrasonography to count and measure follicles during superovulation. Monitoring data guides real-time protocol adjustments to optimize ovulation numbers.

Lesson 4 • Troubleshooting Poor Superovulatory Response

Identifies causes of low ovulation rates, including dominant follicle interference and luteal cysts. Provides corrective strategies to salvage or reschedule donor flushes.

Lesson 1 • Frozen Semen Storage and Thawing

Explains liquid nitrogen tank management, straw inventory, and correct thaw protocols. Improper thawing is a leading cause of preventable fertilization failure.

Lesson 2 • Timing of Insemination After Superovulation

Correlates estrus detection, LH surge, and ovulation timing to determine optimal AI windows. Correct timing is critical when multiple ovulations occur over an extended period.

Lesson 3 • Semen Evaluation and Quality Assessment

Covers motility, morphology, concentration, and viability testing of fresh and frozen semen. Quality thresholds directly determine whether a straw is suitable for donor insemination.

Lesson 1 • Epidural Anesthesia and Donor Restraint

Covers caudal epidural administration to reduce straining and facilitate catheter passage. Adequate analgesia protects both the donor and the operator during the procedure.

Lesson 2 • Transcervical Catheter Placement

Teaches recto-vaginal guidance of the Foley catheter through the cervix into each uterine horn. Correct placement and cuff inflation are prerequisites for effective fluid recovery.

Lesson 3 • Post-Flush Donor Care

Addresses uterine antibiotic infusion, oxytocin administration, and return-to-cycle monitoring. Proper aftercare preserves donor fertility for subsequent flush cycles.

Lesson 4 • Flush Fluid Infusion and Recovery

Details infusion volume, gravity flow, and massage techniques to maximize embryo recovery. Systematic flushing of both horns ensures no embryos are left in the uterus.

Lesson 1 • Developmental Stage Classification

Defines early cleavage, morula, early blastocyst, blastocyst, expanded blastocyst, and hatched stages. Stage classification determines transfer timing and cryopreservation suitability.

Lesson 2 • Morphological Quality Grading

Applies the international 1–4 grading scale based on cell uniformity, compaction, and defect presence. Grading directly determines which embryos are transferred fresh or frozen.

Lesson 3 • Microscopy Setup and Embryo Searching

Covers stereomicroscope calibration, dish preparation, and systematic grid-search technique. Efficient searching ensures all embryos are found before fluid temperature drops.

Lesson 4 • Embryo Washing and Holding Procedures

Demonstrates sequential washing steps to remove debris and pathogens before transfer or freezing. Washing protocols follow international health certification standards for embryo export.

Lesson 1 • Corpus Luteum Evaluation in Recipients

Uses transrectal palpation and ultrasonography to confirm a functional CL before transfer. Only recipients with a quality CL on the correct day are accepted for transfer.

Lesson 2 • Estrus Synchronization Protocols

Covers progesterone devices, prostaglandin injections, and GnRH-based programs to align recipient estrus with donor flush day. Synchrony within 24 hours optimizes embryo survival.

Lesson 3 • Recipient Selection Standards

Defines body condition, pelvic area, reproductive history, and temperament criteria for recipient eligibility. Selecting appropriate recipients is the single greatest factor in pregnancy rate.

Lesson 1 • Post-Transfer Recipient Management

Covers handling restrictions, nutrition adjustments, and early pregnancy monitoring after transfer. Proper post-transfer care reduces embryo loss during the critical implantation window.

Lesson 2 • Transfer Gun Assembly and Sanitation

Covers gun assembly, sheath placement, and sanitation steps to prevent uterine contamination. A correctly assembled gun protects the embryo from physical and microbial damage.

Lesson 3 • Transfer Straw Loading Technique

Demonstrates embryo aspiration into a 0.25 mL straw with correct air-column configuration. Proper loading prevents embryo loss and maintains viability during transfer.

Lesson 4 • Transcervical Embryo Deposition

Teaches recto-vaginal guidance through the cervix to deposit the embryo in the uterine horn ipsilateral to the CL. Correct horn placement is the primary determinant of transfer success.

Lesson 1 • Cryoprotectant Loading Protocols

Details stepwise glycerol or ethylene glycol equilibration to replace intracellular water before freezing. Correct equilibration time and concentration prevent osmotic shock.

Lesson 2 • Vitrification as an Alternative Method

Introduces ultra-rapid cooling using high cryoprotectant concentrations to achieve a glass-like state. Vitrification eliminates ice formation and suits in vitro-produced embryos.

Lesson 3 • Thawing and Direct Transfer Protocols

Demonstrates correct thaw temperature, cryoprotectant removal, and direct-transfer straw preparation. Direct transfer eliminates a laboratory dilution step and reduces handling time.

Lesson 4 • Slow-Cooling Freezing Procedure

Covers programmable freezer operation, seeding, and controlled cooling rates to the plunge temperature. Precise rate control determines post-thaw survival of slow-frozen embryos.