Egg retrieval is a short surgical procedure, typically lasting 15 to 30 minutes, where a doctor uses a thin needle guided by ultrasound to collect eggs directly from your ovaries. It’s the central step in IVF, but the full process starts weeks earlier with hormone injections that stimulate your ovaries to produce multiple eggs at once. Here’s what happens at each stage, what it feels like, and what to expect afterward.
Ovarian Stimulation: The Weeks Before Retrieval
Your ovaries normally release one egg per menstrual cycle. For IVF, the goal is to produce many mature eggs at once, so you’ll inject a hormone called follicle-stimulating hormone (FSH) daily for roughly 8 to 14 days. These injections encourage multiple follicles (the small fluid-filled sacs that each contain an egg) to grow simultaneously. Your clinic will monitor you with blood tests and ultrasounds every few days to track how many follicles are developing and how large they’re getting.
Dosing is individualized. Some patients start at a lower dose and others higher, depending on age, ovarian reserve, and how their body has responded in previous cycles. Research shows that increasing the dose beyond a certain point doesn’t necessarily yield more eggs. Patients who started at moderate doses and then had their dose raised in a second cycle didn’t perform any better than they had the first time around.
The Trigger Shot
Once your follicles reach the right size (generally around 18 to 20 millimeters), you’ll receive a precisely timed injection called the trigger shot. This injection mimics a natural hormone surge that tells your eggs to complete their final stage of maturation. The most common option is human chorionic gonadotropin (hCG), which acts as a stand-in for the natural ovulation signal. Some protocols use a combination of hCG with another medication to reduce the risk of ovarian hyperstimulation.
Timing is critical. The retrieval is scheduled exactly 35 to 37 hours after the trigger shot. Too early, and the eggs won’t be mature. Too late, and you may ovulate on your own, releasing the eggs before they can be collected. Your clinic will give you a specific time, sometimes in the middle of the night, to administer this injection.
The Day of Retrieval
You’ll need to fast for at least eight hours beforehand (no food or water) and arrive about 30 minutes early. Bring a valid photo ID. You’ll check in with a nurse, meet your anesthesia provider, and change into a gown.
Most clinics use sedation or monitored anesthesia care rather than full general anesthesia. You’ll receive medication through an IV that puts you into a deep, comfortable sleep for the duration of the procedure. You won’t feel pain during the retrieval, and most patients have no memory of it. Some evidence suggests that conscious sedation, compared to general anesthesia, is associated with higher patient satisfaction and even slightly better IVF outcomes, though the ideal sedation approach varies by clinic.
How the Eggs Are Collected
With you sedated, the doctor inserts a transvaginal ultrasound probe, which has a thin needle attached to a guide. The ultrasound provides a live image of your ovaries, and the doctor advances the needle through the vaginal wall into the nearest follicle. A vacuum pump, calibrated to gentle suction pressure, draws the follicular fluid (and the egg inside it) out through the needle and into a collection tube.
The doctor watches each follicle collapse on the ultrasound screen as it’s drained, confirming the contents have been captured. Whenever possible, multiple follicles are accessed through a single puncture in the ovary’s surface to minimize bleeding and tissue disruption. The needle movements are kept small and steady. Follicles smaller than about 10 millimeters are often left alone because they’re unlikely to contain mature eggs. If an ovary is hard to reach, an assistant may apply gentle pressure on your lower abdomen to bring it closer to the vaginal wall.
The whole procedure is repeated on the other ovary. Start to finish, it typically takes 15 to 30 minutes.
What Happens in the Lab
While the retrieval is happening, an embryologist works in a lab right next door. Each time a tube of follicular fluid arrives, the embryologist pours it into a petri dish and examines it under a microscope to locate the egg. Not every follicle contains a viable egg, so the final count may be lower than the number of follicles you saw on your monitoring ultrasounds. Once all follicles have been drained, the embryologist tallies the total eggs retrieved and places them into an incubator to keep them at body temperature and in a controlled environment until the next step, whether that’s fertilization or freezing.
How Many Eggs to Expect
The number of eggs retrieved varies significantly by age. Women between 20 and 30 typically yield 15 to 20 eggs per cycle. Between 31 and 35, the average drops to 12 to 18. From 36 to 40, most retrievals produce 8 to 12 eggs. Over 41, the range falls to roughly 5 to 10. These are averages, and individual results depend on ovarian reserve, the stimulation protocol, and how your body responds. More eggs don’t always mean better outcomes, but having a reasonable number gives the embryologist more to work with when selecting the healthiest embryos.
Recovery After the Procedure
You’ll rest in a recovery area for about 30 minutes to an hour as the sedation wears off. Someone will need to drive you home because the anesthesia impairs your coordination and judgment for the rest of the day.
Mild to moderate cramping, similar to period pain, is normal. Some spotting or light vaginal bleeding is common and usually stops within 48 hours. The sedation medications can cause nausea in some patients. Over-the-counter pain relief is generally enough to manage discomfort. Most people feel well enough to return to normal activities the next day, though you should avoid anything strenuous.
For the first week after retrieval, avoid tampons, tub baths, swimming, and vaginal douches. The needle punctures in the vaginal wall need time to heal, and submerging in water or introducing anything into the vagina increases the risk of infection. Showers are fine. Sexual intercourse isn’t medically off-limits, but it may be uncomfortable for several days. Most patients return to moderate exercise within one to two weeks, starting with light activity like walking or gentle yoga and building from there.
If your work involves heavy lifting, exposure to chemicals, or contact with sources of infection like a childcare setting, talk with your clinic about when it’s safe to go back. For desk jobs or light work, the next day is usually fine.
Risks and Complications
Egg retrieval is considered safe, but it’s not without risks. The most talked-about complication is ovarian hyperstimulation syndrome (OHSS), which happens when the ovaries overreact to the stimulation hormones. Mild OHSS, involving bloating, mild pain, and some nausea, is relatively common and resolves on its own. Moderate OHSS requiring medical attention occurs in about 3 to 6 percent of IVF cycles, and severe OHSS, which can involve significant fluid buildup in the abdomen and difficulty breathing, occurs in 0.1 to 2 percent of cases.
Other less common risks include bleeding from the needle puncture sites, infection, or accidental injury to nearby structures like the bladder or bowel. These are rare, particularly when the procedure is performed by an experienced provider using proper ultrasound guidance. Clinics minimize ovarian surface punctures and keep the needle visible on ultrasound at all times to reduce these risks.
What Comes Next
If you’re doing a fresh IVF cycle, your eggs will be fertilized with sperm the same day, either through conventional insemination or intracytoplasmic sperm injection (where a single sperm is injected directly into each mature egg). If you’re freezing eggs for future use, the embryologist will cryopreserve them shortly after retrieval. Your clinic will typically call you the day after retrieval with your fertilization results or your final frozen egg count, and from there, the next steps depend on your specific treatment plan.