Assisted Reproductive Technology Glossary
100 terms total — 24 showing — Last updated 15 Sep 2026
Andrologist
Medical specialist focused on male reproductive health, fertility, and hormonal disorders affecting men.
Embryo Transfer Protocol
Standardized procedures and guidelines for transferring embryos into the uterine cavity during ART cycles.
Embryoscope
Time-lapse imaging system that continuously monitors embryo development without removal from incubator conditions.
Endometrial Pattern
The ultrasound appearance of the endometrium characterized by echogenicity patterns that reflect hormonal influences and...
Endometrial Preparation
The process of optimizing endometrial thickness and receptivity for embryo transfer through hormonal or natural cycle mo...
Endometrial Receptivity
The temporary state of the endometrium when it is capable of accepting and supporting embryo implantation.
Endometrial Scratching
Deliberate injury to the endometrium performed to potentially improve implantation rates in subsequent embryo transfers.
Endometrial Thickness
The measurement of the uterine lining thickness used to assess receptivity for embryo implantation.
Endometriosis
A condition where tissue similar to the uterine lining grows outside the uterus, often causing pain and infertility.
Estradiol
The primary estrogen hormone monitored during ovarian stimulation cycles to assess follicular development.
Fertilization Check
Laboratory assessment performed 16-20 hours post-insemination to confirm successful fertilization.
Fertilization Rate
The percentage of mature oocytes that successfully fertilize after insemination or ICSI, typically reported 16-20 hours...
Follicle-Stimulating Hormone
A pituitary hormone used both as a biomarker for ovarian function and as a fertility medication.
Follicular Fluid
The liquid contained within ovarian follicles that surrounds and nourishes developing oocytes during maturation.
Follicular Monitoring
Serial ultrasound examinations and hormonal assessments to track follicle development during ovarian stimulation cycles.
Folliculogenesis
The process of follicle development from primordial stage to ovulation or atresia.
Fragmentation
The presence of membrane-bound cytoplasmic particles in embryos that lack nuclei, used as a quality assessment parameter...
Freeze-All Cycle
An IVF treatment approach where all embryos are frozen rather than proceeding with fresh embryo transfer.
Frozen Embryo Transfer
The transfer of previously cryopreserved embryos after thawing, performed in a separate cycle from the original stimulat...
Gamete Intrafallopian Transfer
An assisted reproductive procedure where eggs and sperm are placed directly into the fallopian tubes for fertilization t...
Gestational Carrier
A woman who carries an embryo created from another woman's egg, with no genetic relationship to the resulting child.
Gestational Sac
The earliest ultrasound sign of pregnancy, appearing as a fluid-filled structure within the uterine cavity.
Gonadotropin
Hormones that stimulate the gonads, including FSH, LH, and hCG, used therapeutically in ovulation induction protocols.
Gonadotropin Releasing Hormone Antagonist
Medication that blocks GnRH receptors to prevent premature luteinizing hormone surge during ovarian stimulation cycles.
Gonadotropin Surge
The rapid, dramatic increase in luteinizing hormone levels that naturally triggers ovulation in unstimulated cycles.