Types of in vitro fertilization test segmentation map the technological hierarchy underlying each application. Genetic tests—mainly PGT-A, PGT-M and, more recently, PGT-SR—command the highest per-cycle value, embedding whole-genome amplification and next-generation sequencing workflows that laboratories outsource to specialized service providers. Hormone assays generate the highest cumulative volume, spanning basic immunoassay reagents for FSH, LH, estradiol, and AMH used cycle-to-cycle to calibrate stimulation protocols and trigger timing. Microbiome screening is nascent yet growing fastest, employing qPCR panels to detect endometrial pathogens linked to implantation failure and miscarriage. Lastly, semen analysis tests, though commoditized, remain essential for initial male-factor evaluation, contributing margin through computer-assisted sperm analyzers and DNA-fragmentation kits. Together, these sub-types delineate where value is captured across the IVF test supply chain.