- Identity Check: Which ELS(AAB) This Is
- The Two-Exam Structure at a Glance
- Eligibility Snapshot: Four Education Routes
- The 30-in-Each-of-Six Procedure Rule
- Fees, Renewal, and Validity Facts
- The 21-Heading Domain Sheet
- High-Yield Topics by Cluster
- Format, Testing Sites, and Test-Day Rules
- What Is Not Published (and Why It Matters)
- Mapping the Domains to a Study Schedule
- Frequently Asked Questions
- ELS(AAB) requires passing both Basic Knowledge and Embryology; only a failed exam must be repeated.
- Eligibility needs 30 personally performed ART procedures in each of six categories, not 30 total.
- Initial application is $115; first exam $105, each additional same-day exam $65, maximum three.
- Certification renews annually for $115, with no ABOR continuing-education requirement.
Identity Check: Which ELS(AAB) This Is
Several credentials share similar abbreviations, so start by pinning down exactly what you are studying. ELS(AAB) here means Embryology Laboratory Scientist, administered by the American Association of Bioanalysts Board of Registry (ABOR). It is not the andrology credential (ALS), and it is not a laboratory-director credential. If you need a broader orientation first, see What Is ELS(AAB)? or the ELS(AAB) certification overview.
This cheat sheet is a compact reference of the facts that matter most: the exam structure, who qualifies, what the procedure requirement really says, what it costs, and what subjects to master. It is independently authored preparation material. It is not drawn from actual exam questions, and it is not an official mock exam or a measure of your bench competence.
The Two-Exam Structure at a Glance
The most common misunderstanding about this credential is the number of exams. ABOR Examinations requires both of the following:
- Basic Knowledge, taken at the first examination sitting.
- Embryology, the discipline-specific exam.
Both must be passed. If you fail one, you repeat only the one you failed. You do not retake an exam you have already passed.
Eligibility Snapshot: Four Education Routes
ABOR recognizes four qualifying education routes. Every route also requires the documented procedures and one year of acceptable full-time embryology experience (below), plus passing both exams. For the full walkthrough, see ELS(AAB) Requirements 2026.
| Route | What It Requires |
|---|---|
| 1. Bachelor's, master's, or doctorate | Accredited degree or equivalent in chemical, physical, biological, or clinical laboratory science or medical technology. Degrees outside CLS/MT need 6 semester hours chemistry, 6 biology, and 12 combined chemistry/biology/medical laboratory technology. |
| 2. Associate degree | Accredited associate or associate-applied-science degree in clinical laboratory science or medical technology. |
| 3. Sixty semester hours | 60 accredited semester hours or equivalent, including either 24 medical laboratory technology hours (chemistry, hematology, immunohematology, immunology, microbiology) or 24 science hours with the same 6/6/12 distribution. |
| 4. Technologist qualification under federal rules | Qualification or eligibility as a technologist under revised Medicare/CLIA '67, 42 CFR 493.1433 (published March 14, 1990, 55 FR 9538), including HHS/HEW Proficiency Examination passers and those with ten years of full-time experience before January 1, 1968. |
The experience clock
All routes require one year of acceptable full-time embryology experience within the ten years before you apply. The ABOR FAQ defines one full-time year as 2,080 clock hours. Part-time or rotating schedules should be tracked in hours, not calendar months.
The 30-in-Each-of-Six Procedure Rule
This is the requirement candidates most often misread. General Regulations section 15 requires thirty personally completed human ART procedures in EACH of six categories. It is not thirty procedures in total. The categories are:
- Oocyte isolation from follicular aspirations
- Sperm preparation
- ICSI cycles
- Fertilization documentation
- Laboratory preparation for embryo transfer
- Egg/embryo cryopreservation
Fine print worth memorizing
- The procedures must be ones you personally completed, not observed.
- They need not involve the same cycles or patients.
- "Embryo-transfer preparation" means the laboratory portion performed under the lab's standard operating procedures, not the clinical transfer itself.
Provisional status: ELS-P(AAB)
Education-eligible candidates who lack the procedure or experience requirements may be able to receive a provisional ELS-P(AAB) designation after passing the exams. Full certification requires documented qualifying procedures and experience plus board approval. Under the Provisional Status rules, the experience must fall within the ten years before your request to remove provisional status.
Key Takeaway
Start a procedure log on day one of your embryology career, with a running tally for each of the six categories. Cryopreservation and ICSI counts often take the longest to accumulate, depending on your lab's case mix, so check your totals early.
Fees, Renewal, and Validity Facts
The ABOR fee schedule explicitly includes ELS. These are exam and application fees, separate from any review-course pricing. For a full breakdown, see ELS(AAB) Certification Cost 2026.
| Item | Amount |
|---|---|
| Initial application | $115 |
| First examination | $105 |
| Each additional examination taken the same day (maximum three) | $65 |
| ABOR proctor | $35 per person per day |
| College/university testing-center proctor | Charged separately by the center |
| Annual renewal | $115 |
Validity and renewal
- Initial certification is valid through December 31 of the award year.
- Renewal is annual, at $115.
- ABOR has no continuing-education requirement for maintaining certification. State licensing obligations are separate and may impose their own rules.
For scheduling specifics, see ELS(AAB) Exam Dates 2026.
The 21-Heading Domain Sheet
The 21 headings below reproduce public subject titles from the AAB Reproductive Biology Laboratory Courses list (2026 course list, recorded September 2025). They are a preparation curriculum: unweighted, nonexhaustive, and not an official exam blueprint. They do not establish 21 official ELS exam domains. Treat them as a map of the territory, then refine with the examination outline you receive after candidacy approval. A deeper walkthrough is in ELS(AAB) Exam Domains 2026.
| # | Heading | # | Heading |
|---|---|---|---|
| 1 | CLIA '88 | 12 | Male Contribution to the Embryo and Offspring |
| 2 | Cryopreservation Theory and Practice | 13 | Male Reproductive Function - Infertility |
| 3 | Culture Techniques | 14 | Male Reproductive Function: Development of the Male Genitourinary Tract |
| 4 | Embryo Selection and Contemporary Embryo Transfer Art and Science | 15 | Male Reproductive Function: Spermatogenesis and Male Reproductive Tract Biology |
| 5 | FDA-HCTP Regulations and Fertility Clinic Success Rate Certification Act | 16 | Micromanipulation |
| 6 | Female Physiology and Reproductive Function | 17 | Ovulation Induction and Female Infertility |
| 7 | Fertilization and Early Embryonic Development | 18 | Preimplantation Genetic Testing |
| 8 | Financial Laboratory Management and Employment Law | 19 | Reproductive Genetics |
| 9 | Gamete Preparation | 20 | Semen Analysis and Advanced Diagnostics |
| 10 | General Laboratory Management | 21 | Total Quality Management in the IVF Laboratory |
| 11 | Laboratory Safety, OSHA, and Disaster Preparedness |
High-Yield Topics by Cluster
Rather than memorizing 21 isolated headings, group them into clusters that mirror how the lab actually works. Below are the concepts worth reviewing in each cluster. Public course titles were retrieved, but paid lesson contents were not, so these cluster notes are subject-matter orientation drawn from the headings themselves and from standard embryology knowledge, not a reproduction of any course.
Bench Core: Gamete Preparation, Culture Techniques, Micromanipulation, Cryopreservation
The domains closest to your six required procedure categories.
- Gamete handling and sperm preparation methods, and when each suits a given sample
- Culture systems, media, and environmental control of the incubator
- ICSI and related micromanipulation concepts
- Cryopreservation theory: cryoprotectants, cooling, warming, and the principles behind slow freezing versus vitrification
Biology of Fertilization and Development
Domains 7, 6, and 17 connect lab observation to physiology.
- Fertilization events and early embryonic development, including what you document at fertilization checks
- Female physiology and the hormonal axis behind cycles
- Ovulation induction and the clinical reasons stimulation protocols differ
- Embryo selection and the lab's role in transfer preparation
The Male Side of the Embryology Lab
Five headings concern male reproduction: male contribution to the embryo, infertility, genitourinary development, spermatogenesis, and semen analysis. Embryologists work with sperm daily, so this material is relevant even though the credential is not the andrology certification. Focus on how sperm biology and diagnostics affect fertilization and embryo development, without substituting ALS-specific depth.
Genetics
Reproductive Genetics and Preimplantation Genetic Testing. Expect to need the vocabulary and logic behind testing, including what biopsy and testing can and cannot tell you, and how results connect to embryo selection.
Regulation, Safety, Quality, and Management
Domains 1, 5, 8, 10, 11, and 21 are easy to underrate because they feel less hands-on. They are also where bench-trained candidates can lose points.
- CLIA '88 requirements as they apply to the lab
- FDA human cells, tissues, and cellular and tissue-based products (HCT/P) regulations and the Fertility Clinic Success Rate and Certification Act
- Employment law and financial management basics
- OSHA, laboratory safety, and disaster preparedness (think liquid nitrogen storage, tank alarms, and contingency planning)
- Total quality management: quality indicators, documentation, and corrective action
The domain-by-domain approach is expanded in the ELS(AAB) Study Guide.
Format, Testing Sites, and Test-Day Rules
- Format: paper-and-pencil, multiple-choice, computer scored.
- Aids: calculators and outside notes are restricted.
- Sites: ABOR provides examination sites in California and Florida. Elsewhere, approved college or university testing centers are the stated alternative.
- Order: Basic Knowledge is taken at your first examination sitting.
- Same-day option: the fee schedule allows up to three examinations on the same day, so taking Basic Knowledge and Embryology together is a fee-supported option.
Because calculators and notes are restricted, any quantitative material you expect to need, such as dilution logic or concentration reasoning, should be practiced by hand. Familiarity with the multiple-choice, single-best-answer style is easiest to build with timed practice questions that mirror the paper format.
What Is Not Published (and Why It Matters)
Honest preparation means knowing what you cannot know yet. The following ELS-specific values are not published in the sources available for this article:
- The combined question count
- The exam duration
- The passing threshold
- Official topic weights
The ABOR FAQ states that the examination outline, including approximate topic percentages, and the reference-book list are supplied after candidacy approval. Be skeptical of any site quoting exact pass rates, cut scores, or domain percentages for this credential. See ELS(AAB) Passing Score and ELS(AAB) Pass Rate for how to reason about these gaps, and How Hard Is the ELS(AAB) Exam? for a qualitative difficulty discussion.
Key Takeaway
Once your candidacy is approved, replace this article's unweighted domain map with the official examination outline and reference list. Candidate-approved information and current issuer validation should always override third-party summaries, including this one.
Mapping the Domains to a Study Schedule
Since weights are unpublished until candidacy approval, balance your time by clusters and by your own weak spots. One reasonable sequencing, anchored to ABOR's published preparation materials (the 2025-edition combined Andrology and Embryology review materials and the PER Basic Knowledge Manual, 2020 edition):
Basic Knowledge foundation
- Work through the Basic Knowledge Manual, since this exam comes first at your sitting
- Cover CLIA '88, safety, OSHA, and quality management early, while they are fresh
Physiology and gametes
- Female physiology, ovulation induction, and the male reproductive headings
- Gamete preparation and semen analysis
Embryo-side bench science
- Fertilization, early development, culture, micromanipulation, cryopreservation
- Embryo selection and transfer preparation
Genetics, regulation, and integration
- Reproductive genetics and PGT
- FDA HCT/P rules, the Success Rate Act, employment law, financial management
- Full-length mixed review and weak-area repair
Adjust the timeline to your daily work. A technologist doing ICSI and freezing every week may need less time on bench-core domains and more on regulation and genetics; a candidate from a clinical lab background may need the reverse.
Frequently Asked Questions
Two: Basic Knowledge and Embryology. Both are required, and if you fail one you repeat only the one you failed.
No. It is thirty personally completed human ART procedures in each of six categories: oocyte isolation, sperm preparation, ICSI cycles, fertilization documentation, laboratory preparation for embryo transfer, and egg/embryo cryopreservation. The procedures need not involve the same cycles or patients.
The initial application is $105 for the first exam plus $115 for the application. A second exam taken the same day adds $65. An ABOR proctor adds $35 per person per day, while testing-center proctor charges are paid separately. Review courses are priced separately. The cost breakdown covers each line item.
Renewal is annual at $115. ABOR has no continuing-education requirement, though your state may impose separate licensing obligations.
No credential guarantees pay or placement. For a qualitative look at employer value and career considerations, see the salary guide, the ROI analysis, and ELS(AAB) jobs.