What Does an Embryologist Do? Behind the Scenes of IVF
What Does an Embryologist Do?
When most people think of IVF, they picture the doctor. But behind every successful IVF cycle is an embryologist — a highly specialised scientist who works with your eggs, sperm, and embryos in the laboratory.
Who Is an Embryologist?
An embryologist (also called a clinical embryologist or reproductive biologist) is a scientist trained in handling human gametes (eggs and sperm) and embryos. They typically hold advanced degrees in biology or reproductive science and undergo years of specialised training.
A Day in the IVF Lab
Morning: Checking embryos: The day begins by examining all developing embryos under the microscope, recording their progress and quality.
Egg collection day: When a patient has their egg retrieval, the embryologist receives the follicular fluid and identifies each egg under the microscope. Speed and precision are critical — eggs are delicate.
Sperm preparation: Semen samples are washed and prepared to select the healthiest, most motile sperm.
Fertilisation: The embryologist either combines sperm with eggs for conventional IVF or performs ICSI — injecting a single sperm directly into each mature egg using a microscopic needle.
Embryo culture: Embryos are placed in specialised incubators that mimic the conditions of the fallopian tube — precise temperature, gas mixture, and culture media.
Daily assessment: Each day, embryos are assessed for development. By Day 3, a good embryo has 6-8 cells. By Day 5, it should be a blastocyst — a complex structure of 100+ cells.
Embryo selection: Using morphological grading (and sometimes time-lapse imaging), the embryologist identifies the best embryo for transfer.
Vitrification (freezing): Surplus quality embryos are ultra-rapidly frozen for future use, preserved at -196°C in liquid nitrogen.
The ICSI Procedure
ICSI is perhaps the most technically demanding skill. Using a microscope at 200-400x magnification, the embryologist:
- Holds the egg steady with a holding pipette
- Selects a single healthy sperm
- Immobilises the sperm
- Inserts a glass needle thinner than a human hair into the egg
- Deposits the sperm inside
This entire procedure happens in a space smaller than a full stop on this page.
Quality and Safety
Embryologists maintain meticulous chain-of-custody protocols:
- Double-witness systems to prevent mix-ups
- Continuous environmental monitoring
- Regular equipment calibration
- Strict quality control procedures
The Human Element
Despite working with microscopes and sophisticated equipment, embryology is deeply human work. Each egg represents a patient's hope. Each embryo is a potential new life. Embryologists carry this responsibility with care and dedication.
Our Laboratory
At Sali International Women's Hospital, our IVF laboratory is equipped with the latest technology and staffed by experienced embryologists who are committed to giving every patient the best possible chance.
