ABB Embryology study guide
ABB Embryology · Work through your exam, one topic at a time.
The ABB Embryology credential is a professional certification for laboratory scientists who perform human embryology work in assisted reproduction. It signals to employers, inspectors, and accreditors that a technologist or supervisor has demonstrated the theoretical and practical knowledge expected of someone directing or performing embryology laboratory operations. The ABB Embryology study guide has 9 sections and about 1,817 words.
01Gametogenesis and Reproductive Anatomy
Gametogenesis begins with primordial germ cells migrating to the gonadal ridge, then diverges: spermatogenesis is continuous from puberty with mitotic amplification, meiosis, and spermiogenesis; oogenesis arrests in prophase I (dictyate) until the LH surge, completing meiosis II only at fertilization. Know the timing of meiotic resumption, polar body extrusion, and the cytoplasmic asymmetries that give the oocyte its stores of mRNA and mitochondria.
270 words, about 1 min02Fertilization and Early Embryonic Development
Fertilization requires capacitation, sperm binding to the zona pellucida (ZP2/ZP3 interactions), the acrosome reaction, membrane fusion, and cortical granule release to block polyspermy. After syngamy, cleavage divisions occur without growth, so cell number rises while embryo volume stays roughly constant.
238 words, about 1 min03Embryology Laboratory Techniques and Procedures
Master the workflow: oocyte retrieval, denudation, insemination (IVF or ICSI), culture, assessment, and transfer or cryopreservation. Know the purpose of each step and the failure modes.
200 words, about 1 min04Culture Systems and Incubation Conditions
Culture systems rely on balanced salt solutions, energy substrates (pyruvate, lactate, glucose), amino acids, and protein supplementation. Sequential media change composition to match embryo metabolism; single-step media aim for stability.
206 words, about 1 min05Micromanipulation and Assisted Reproductive Technologies
ICSI involves immobilizing sperm, aspirating it, and injecting it into the oocyte cytoplasm after breaching the zona and oolemma. Know the sequence and the purpose of each step.
190 words, under 1 min06Cryopreservation and Thawing of Gametes and Embryos
Cryopreservation uses cryoprotectants (permeating and non-permeating), controlled cooling, and either slow-freezing or vitrification. Vitrification relies on high cryoprotectant concentrations and rapid cooling to avoid ice crystal formation.
180 words, under 1 min07Embryo Assessment, Grading, and Selection
Assessment combines morphological grading (cell number, symmetry, fragmentation, compaction, blastocoel expansion, inner cell mass and trophectoderm quality) with developmental timing. Know common grading schemes and what each parameter reflects.
188 words, under 1 min08Quality Control, Quality Assurance, and Laboratory Safety
Quality control (QC) monitors individual measurements and processes; quality assurance (QA) is the broader system ensuring consistent quality. Know the difference between internal and external QC, proficiency testing, and the role of standard operating procedures (SOPs).
178 words, under 1 min09Regulatory, Ethical, and Professional Standards
Know the regulatory landscape: accreditation bodies, licensing requirements, and reporting obligations. Understand ethical principles - informed consent, confidentiality, gamete and embryo disposition, and limits on embryo research.
167 words, under 1 min