After egg retrieval, two things happen simultaneously: your eggs go to the embryology lab for fertilization, and your body begins recovering from the procedure. Most women go home within an hour or two and feel back to normal within a few days, though the full timeline depends on how many eggs were retrieved and whether you’re doing a fresh embryo transfer or freezing.
The First Few Hours After the Procedure
Egg retrieval is done under sedation, so you’ll wake up in a recovery area feeling groggy. Nurses will monitor your vital signs, check for any bleeding, and manage any immediate discomfort. Most clinics keep you for 30 to 60 minutes before discharge. You won’t be able to drive yourself home, so you’ll need someone with you.
Cramping is the most common sensation right away, similar to moderate period cramps. Some women also feel bloated, nauseous from the anesthesia, or have light spotting. Clinics typically recommend over-the-counter pain relief like acetaminophen. Most advise against ibuprofen and other anti-inflammatory medications because they can interfere with implantation if you’re planning a fresh transfer.
What Happens to Your Eggs in the Lab
While you’re recovering, the embryology team gets to work. The fluid collected from your follicles is examined under a microscope to identify and isolate mature eggs. Not every follicle contains a mature egg, so the number of eggs retrieved is often lower than the number of follicles seen on ultrasound. Your clinic will usually call you later that day with a count of how many mature eggs were collected.
Fertilization happens within a few hours of retrieval, either through conventional IVF (placing sperm and eggs together in a dish) or ICSI, where a single sperm is injected directly into each egg. By the next morning, the lab can see which eggs fertilized successfully. You’ll typically get a call with your fertilization report about 16 to 18 hours after retrieval. On average, about 70 to 80 percent of mature eggs fertilize normally, though this varies widely.
From there, the fertilized eggs (now called embryos) are cultured in the lab for several days. The lab monitors their development closely, looking for specific milestones at each stage. By day 3, a healthy embryo has about 6 to 8 cells. By day 5 or 6, the strongest embryos reach the blastocyst stage, a more advanced structure of around 100 cells with two distinct cell types. Not all fertilized eggs make it to blastocyst. The drop-off between fertilization and blastocyst is one of the most significant in the entire IVF process, with roughly 30 to 50 percent of fertilized eggs developing into usable blastocysts.
The Waiting Game: Daily Updates
Most clinics provide updates at key checkpoints rather than daily. You’ll hear from them on day 1 (fertilization results), and then again around day 5 or 6 with the final embryo count. Some clinics also give a day 3 update, though others prefer not to since early-stage assessments don’t always predict which embryos will ultimately thrive. This waiting period is one of the most stressful parts of IVF for many people. Each update narrows the numbers, and it’s normal for the count to drop at every stage.
If you’re doing preimplantation genetic testing (PGT), a small biopsy of cells is taken from each blastocyst on day 5 or 6. The embryos are then frozen while the biopsied cells are sent to a genetics lab. Results from genetic testing take one to two weeks, sometimes longer. This means you’ll have an additional wait before knowing how many embryos are genetically normal and available for transfer.
Physical Recovery: Days 1 Through 7
Most women feel significantly better within 48 hours. The first day or two often involves cramping, bloating, and fatigue. By day 3 or 4, the majority of people return to work and normal activities. However, if a large number of eggs were retrieved (roughly 15 or more), recovery can take longer because the ovaries are more swollen.
Your ovaries, which were stimulated to grow multiple follicles, are still enlarged after retrieval. They can be several times their normal size, which is why you may feel a heavy or full sensation in your pelvis. Strenuous exercise, heavy lifting, and high-impact activity are off-limits for about a week to reduce the risk of ovarian torsion, a rare but serious condition where an enlarged ovary twists on itself.
Bloating is almost universal and can be surprisingly pronounced. Your pants may not fit comfortably for a week or so. Some fluid accumulates in the abdomen after follicles are drained, and the hormones from stimulation contribute to water retention. Drinking electrolyte-rich fluids, eating salty foods, and staying hydrated all help your body reabsorb that fluid more quickly. Many women swear by high-protein, high-sodium foods during this phase.
Ovarian Hyperstimulation Syndrome
A small percentage of women develop ovarian hyperstimulation syndrome (OHSS), a condition where the ovaries overreact to fertility medications. Mild OHSS causes increased bloating, nausea, and abdominal discomfort. It typically peaks about 5 to 7 days after retrieval and resolves on its own within a week or two.
Moderate to severe OHSS is less common but requires medical attention. Warning signs include rapid weight gain (more than 2 pounds per day), severe abdominal pain, vomiting, difficulty breathing, or decreased urination. Severe cases can cause dangerous fluid shifts in the body and occasionally require hospitalization. Women who produced a very high number of eggs, have polycystic ovary syndrome, or are younger tend to be at higher risk. If your doctor suspects you’re at risk, they may recommend a “freeze-all” cycle, skipping the fresh transfer to let your body recover before transferring an embryo in a later cycle.
Fresh Transfer vs. Freeze-All
If you’re doing a fresh embryo transfer, it typically happens on day 3 or day 5 after retrieval. You’ll continue taking progesterone (usually vaginal suppositories or injections) to support your uterine lining. The transfer itself is quick and painless, similar to a Pap smear, and doesn’t require sedation. Your pregnancy test is scheduled about 9 to 12 days after transfer.
Freeze-all cycles have become increasingly common. In this approach, all viable embryos are frozen and the transfer is scheduled for a future month. This gives your body time to recover from stimulation, lets your hormone levels return to normal, and allows time for genetic testing if needed. Research has shown that frozen embryo transfers result in comparable or slightly better pregnancy rates in many cases, partly because the uterine lining isn’t affected by the high estrogen levels from stimulation.
Your First Period After Retrieval
If you’re not doing a fresh transfer, or if the transfer doesn’t result in pregnancy, your period will arrive roughly 5 to 14 days after retrieval. This first period is often heavier and more uncomfortable than usual because your uterine lining was thickened by the stimulation hormones. Some women find it arrives earlier than expected, while others experience a longer wait. The timing varies based on your progesterone supplementation and when you stop taking it.
Your next cycle after that first period is generally more normal, though it can take one to two full cycles for your ovaries to return to their baseline size and for your menstrual pattern to regulate. Some clinics recommend waiting one full cycle before a frozen embryo transfer, while others proceed in the very next cycle.
Emotional Recovery
The hormonal shifts after retrieval are significant. Estrogen levels that were sky-high during stimulation drop rapidly, which can trigger mood swings, irritability, tearfulness, or a feeling similar to severe PMS. Combined with the anxiety of waiting for embryo updates, this stretch is emotionally intense for most people. It helps to know that these feelings are hormonally driven and temporary. Most women notice their mood stabilizing once their period arrives and hormone levels even out.
The progressive drop in embryo numbers can also be difficult. Starting with 15 eggs and ending with 3 blastocysts is a completely normal outcome, but each update can feel like a loss. Having realistic expectations going in, and understanding that the attrition from eggs to embryos is a natural part of the process, can make those calls a little easier to absorb.