Key takeaways

  • Egg retrieval is a 20–30 minute procedure done under sedation, with transvaginal ultrasound guidance and no incisions or stitches.
  • It happens 34–36 hours after a precisely timed trigger shot, at the end of 9–14 days of ovarian stimulation injections.
  • Most women feel only mild cramping and bloating afterwards and return to desk work within 1–2 days.
  • Quality matters more than quantity: live birth rates peak around 15–20 eggs, and very high counts raise the risk of ovarian hyperstimulation syndrome (OHSS).
  • A full fresh IVF cycle in India typically costs Rs 1.2–2.5 lakh; ICSI, PGT-A, and donor cycles add to this.
  • Severe complications are rare at registered ART clinics following FOGSI–ISAR and ESHRE protocols.

What egg retrieval actually is

Egg retrieval (also called transvaginal oocyte aspiration or ovum pick-up, OPU) is the collection of mature eggs from your ovaries after a course of ovarian stimulation. A thin needle, guided by transvaginal ultrasound, passes through the vaginal wall into each ovarian follicle and gently suctions out the fluid that contains the egg. The eggs go straight to the embryology lab to be fertilised by conventional IVF or by intracytoplasmic sperm injection (ICSI).

The procedure itself takes about 20–30 minutes, and you are usually discharged within 3–4 hours once the sedation wears off. It is the central event of any IVF cycle and the only surgical step you go through directly. Everything before it (injections, scans, blood tests) is preparation; everything after it (fertilisation, embryo culture, transfer) happens in the lab or as a separate embryo transfer procedure.

How many eggs you get depends on how your ovaries respond to stimulation, which in turn depends on your anti-Müllerian hormone (AMH), antral follicle count (AFC), age, body weight, any previous IVF response, and the protocol your fertility specialist chooses. A typical good response in a woman under 35 with normal ovarian reserve is about 8–15 mature eggs. Fewer than 4 eggs is considered a poor response and may prompt a protocol change for future cycles; more than 20 eggs raises OHSS risk and may lead the clinic to use an agonist trigger or a freeze-all approach.

Leading bodies such as ASRM, ESHRE, FOGSI, and ISAR all treat retrieval as a low-risk outpatient procedure when it is performed by a trained reproductive endocrinologist at a registered ART clinic. In India, clinic registration is mandatory under the ART (Regulation) Act 2021, and the National ART and Surrogacy Board maintains the registry.

Ovarian stimulation: 9–14 days of injections before retrieval

Retrieval is preceded by controlled ovarian stimulation lasting roughly 9–14 days. The aim is to mature several follicles at once, rather than the single dominant follicle of a natural cycle. Daily gonadotropin injections (FSH, or FSH plus LH) drive this multi-follicular growth.

Common gonadotropin brands in India include recombinant FSH (Recagon, Gonal-F, Puregon at roughly Rs 1,800–3,500 per 75 IU vial), urinary HMG containing FSH plus LH (Menopur, Menogon at Rs 1,500–2,500 per vial), and recombinant FSH biosimilars (Foligraf, Folisurge at Rs 1,200–2,200 per vial). Typical daily doses are 150–300 IU, adjusted for AMH, age, BMI, and previous response. A full cycle uses around 15–35 vials, so stimulation drugs alone cost roughly Rs 35,000 to Rs 1.2 lakh depending on dose and brand.

Most Indian clinics use the antagonist protocol as their default: gonadotropins begin on day 2 or 3 of the cycle, and a GnRH antagonist (Cetrotide at Rs 2,000–2,500 per injection, or Orgalutran at Rs 1,500–2,200) is added from day 6, or once the lead follicle reaches about 14 mm, to prevent a premature LH surge. The antagonist protocol is shorter, uses fewer drugs, and carries a lower OHSS risk than the older long agonist protocol, which is why FOGSI–ISAR and ESHRE guidance now favour it as first-line for most patients.

Monitoring scans every 2–3 days (roughly Rs 800–2,500 per scan) track follicle size and number and check the endometrial lining. Blood tests for estradiol and progesterone (about Rs 600–1,800 per panel) follow your ovarian response and flag early luteinisation. When at least 2–3 lead follicles reach 17–18 mm, the trigger shot is given to mature the eggs for retrieval 34–36 hours later. If you want to understand the hormone story behind all this, our explainer on the follicular phase of the cycle is a useful primer.

The trigger shot: precise timing for egg maturation

The trigger shot is the most precisely timed injection in the whole cycle. It pushes the eggs through their final maturation, from the immature germinal-vesicle or metaphase-I stage to the mature metaphase-II (M2) stage that can actually be fertilised. Retrieval is scheduled for exactly 34–36 hours after the trigger, because eggs would otherwise ovulate on their own around 38–40 hours after an LH surge or hCG trigger.

There are three main trigger options:

  • Recombinant hCG (Ovitrelle 250 mcg, around Rs 2,200–3,000) mimics the natural LH surge and is the classic trigger.
  • Urinary hCG (Pregnyl, Profasi at Rs 800–1,500 per vial) is cheaper and equally effective for low-risk responders.
  • GnRH agonist trigger (Lupride, Decapeptyl, Buserelin at Rs 800–2,500) is used in high responders on the antagonist protocol to cut OHSS risk, because it prompts your own LH surge, which clears faster than hCG.

A dual trigger (low-dose hCG plus an agonist) is increasingly common for moderate responders, to balance egg maturity against OHSS prevention. The trigger is self-administered at a precise time, often late evening (typically between 9 PM and midnight), so retrieval can fall during clinic morning hours 34–36 hours later.

Mistiming the trigger by more than an hour or two can compromise egg maturity, lead to empty follicle syndrome (where no eggs are retrieved), or allow premature ovulation. To prevent this, most Indian clinics call you at the scheduled time, ask you to repeat the dose and timing back, and request a WhatsApp photo of the empty vial. After the trigger you take no further injections except, sometimes, a single antibiotic dose to reduce the small risk of post-retrieval infection.

What happens on retrieval day

On the day of retrieval you arrive 1–2 hours early, having fasted for 6–8 hours as advised by the anaesthetist. You change into a gown, sign consent forms, and meet the anaesthetist, who reviews your history, medications, and allergies. An IV cannula is placed, and you are taken to the procedure room, which usually sits right next to the embryology lab so follicular fluid can be passed through a hatch straight to the embryologist.

You lie down with leg supports, much like a gynaecological exam. The anaesthetist gives either conscious sedation (commonly a propofol-based combination) or a short general anaesthetic, depending on clinic protocol and your preference. Propofol sedation is the norm in most Indian clinics: you sleep through the procedure but wake quickly afterwards.

The reproductive endocrinologist cleans the vagina with sterile saline (povidone-iodine is avoided because it is toxic to eggs), then inserts the ultrasound probe with a needle guide attached. A fine 17–18 gauge needle passes through the vaginal wall into each follicle in turn. The fluid is suctioned into a tube and handed immediately to the embryologist, who finds and isolates the egg under a microscope. The whole process usually takes 20–30 minutes, depending on how many follicles there are.

Afterwards you recover in a day-care room for 2–4 hours as the sedation wears off, and the embryologist tells you the egg count before you go home. You will be given post-retrieval care instructions and started on progesterone luteal support, such as vaginal progesterone (Susten, Naturogest, Crinone) at roughly Rs 200–800 per cycle, or oral dydrogesterone (Duphaston) at Rs 250–500 per cycle.

Recovery, what you will feel, and going back to work

  • Severe abdominal pain not relieved by paracetamol
  • Fever above 38°C
  • Heavy vaginal bleeding (more than a heavy period)
  • Shortness of breath
  • Rapid weight gain of more than 1 kg in a day (a sign of OHSS fluid shift)
  • Severe nausea or vomiting, or much less urine than usual
  • Sudden one-sided, severe pelvic pain (possible ovarian torsion)

Ovarian hyperstimulation syndrome (OHSS): the main risk

Ovarian hyperstimulation syndrome (OHSS) is the most significant complication of IVF stimulation, and the reason for all the monitoring. It happens when the ovaries over-respond, producing many follicles and very high estradiol levels, which causes fluid to shift out of the blood vessels into the abdomen and, in severe cases, the chest.

  • Mild OHSS (bloating, mild discomfort, 1–2 kg weight gain) occurs in roughly 20–30% of cycles and settles on its own over 1–2 weeks.
  • Moderate OHSS (marked distension, nausea, vomiting, over 3 kg weight gain) occurs in about 3–6% and needs outpatient monitoring, fluids, anti-emetics, and sometimes drainage of abdominal fluid.
  • Severe OHSS (large fluid collections, kidney strain, clotting risk, needing hospital admission) occurs in under 1–2% of cycles with modern protocols, and is the form that can be dangerous.

Risk is higher with AMH above 3.5 ng/ml, antral follicle count above 24, age under 35, low body weight, a history of PCOS, prior OHSS, or more than 20 follicles or estradiol above 5,000 pg/ml at trigger. FOGSI–ISAR and ESHRE prevention guidance recommends the antagonist protocol for high-risk patients, an agonist trigger instead of hCG for high responders, a freeze-all approach with no fresh transfer, a low-dose or dual trigger for moderate responders, cabergoline 0.5 mg daily for about 8 days after trigger, and good hydration with electrolyte-rich fluids.

If severe OHSS does develop, hospital care includes IV fluids, albumin, clot-prevention with low-molecular-weight heparin (Clexane, Enoxaparin), drainage of fluid, and supportive care until it resolves, usually within 2–4 weeks. With proper protocols at FOGSI–ISAR-affiliated clinics, severe OHSS is now uncommon.

How many eggs are enough, and what determines yield

Egg yield is the most talked-about number in IVF, and the honest answer is that the right number depends on you. Large analyses, including a widely cited 2011 meta-analysis in Human Reproduction and ongoing ESHRE registry work, suggest that live birth rates rise with egg number up to around 15–20 retrieved eggs and then plateau or slightly fall, while OHSS risk keeps climbing.

As a rough guide:

  • Under 35 with good reserve: about 8–15 mature eggs is a typical good response.
  • 35–40: about 5–10 mature eggs is reasonable.
  • Over 40 or with diminished ovarian reserve: 2–5 eggs may be realistic, and is still worth proceeding with.

The main predictors of yield are AMH, antral follicle count on early-cycle ultrasound (normal range roughly 8–24 follicles), day-3 FSH and estradiol (FSH under 10 IU/L is reassuring), and your response in any previous cycle. If you have not had these checked, our overview of fertility tests for women explains what each one tells you, and what counts as a good AMH level puts the numbers in context.

What counts is the number of mature M2 eggs, not total eggs aspirated. Typically 70–80% of retrieved eggs are mature; of those, 60–80% fertilise; of fertilised eggs, 30–60% reach the day-5 blastocyst stage. The proportion of blastocysts that are chromosomally normal (euploid) falls sharply with age, from roughly 60–70% under 35 to 30–40% at 40 and under 20% by 43. This cascading attrition is why more eggs improve your cumulative chance of a live birth, but only up to a point. For a clearer picture of how reserve changes over time, see our guide on how many eggs a woman has. Discuss your own predictors with your reproductive endocrinologist before you start, so your expectations are realistic.

Indian IVF cost, the ART Act 2021, and choosing a clinic

  • Mandatory clinic registration with the National ART and Surrogacy Board
  • Separation of clinics and ART banks (banks supply gametes; clinics provide treatment)
  • Donor anonymity, unless a court orders disclosure
  • Egg donation limited to once in a donor's lifetime, with health screening; sperm donation limited to one couple per donor
  • Age limits of 21–50 for women and 21–55 for men seeking IVF
  • Mandatory insurance cover for donors, and a ban on sex selection

Luteal support, embryo decisions, and next steps after retrieval

Right after retrieval, you start luteal-phase progesterone support to prepare the uterine lining for implantation. Stimulation and retrieval impair the corpus luteum, so Can Progesterone Help You Get Pregnant? Honest Science replaces what your body can no longer make in enough quantity. Common Indian regimens are vaginal progesterone (Susten, Naturogest, Crinone, Endometrin at roughly Rs 200–800 per cycle), oral dydrogesterone (Duphaston 10 mg two or three times daily at Rs 250–500), or a combination. ESHRE and FOGSI–ISAR guidance treat vaginal progesterone as standard, while oral dydrogesterone is increasingly used after the LOTUS trials showed comparable live birth rates with better tolerability. Luteal support continues until 10–12 weeks of pregnancy, when the placenta takes over.

The transfer decision is made within 1–5 days of retrieval:

  • Day-3 (cleavage-stage) transfer is used when only 1–3 embryos are available, or when blastocyst culture is not preferred.
  • Day-5 (blastocyst) transfer is preferred when 4 or more good embryos are available, as it improves implantation per embryo and supports single embryo transfer.
  • Freeze-all (no fresh transfer) is recommended for high OHSS risk, raised progesterone at trigger (over 1.5 ng/ml), a thin lining, or planned PGT-A.

If you want to picture what happens in the lab between retrieval and transfer, our walk-through of IVF embryo development follows the eggs day by day. Discuss your transfer plan with your reproductive endocrinologist before retrieval, so everyone is aligned.

When to see a doctor

  • Severe or worsening abdominal pain, or sudden one-sided pelvic pain (possible ovarian torsion)
  • Rapid weight gain or marked abdominal swelling with breathlessness (possible moderate-to-severe OHSS)
  • Heavy vaginal bleeding, soaking more than a heavy period
  • Fever above 38°C, which may signal infection
  • Persistent vomiting, dizziness, or passing much less urine than usual
  • Calf pain, swelling, or chest pain (possible blood clot, a known OHSS risk)

Myths vs facts

Frequently asked questions

Does egg retrieval hurt?

You should not feel pain during the procedure itself, as it is done under sedation or short general anaesthesia. Afterwards, mild period-like cramping and bloating are common for a day or two and respond well to paracetamol. Avoid ibuprofen and other NSAIDs if a fresh embryo transfer is planned.

How many eggs is a good number to retrieve?

It depends on your age and ovarian reserve. Around 8–15 mature eggs is a typical good response under 35, while 2–5 eggs can still be worth proceeding with after 40. Research suggests live birth rates peak around 15–20 eggs, so quality and the number of mature M2 eggs matter more than a very high total.

How long does it take to recover after egg retrieval?

Most women feel groggy for a few hours on the day and well enough for gentle activity by the next morning. Many return to desk work within 1–2 days. Your ovaries stay enlarged for 1–2 weeks, so avoid strenuous exercise, heavy lifting, and intercourse until your clinician clears you.

What is the risk of OHSS after retrieval?

Mild OHSS (bloating, slight weight gain) occurs in roughly 20–30% of cycles and settles on its own. Severe OHSS now occurs in under 1–2% of cycles with modern protocols such as the antagonist protocol, agonist trigger, and freeze-all strategy. Seek urgent care for rapid weight gain, severe bloating, breathlessness, or much reduced urine.

How much does IVF egg retrieval cost in India?

A full fresh IVF cycle, including stimulation, retrieval, fertilisation, and one fresh transfer, typically costs Rs 1.2–2.5 lakh. Stimulation drugs alone account for roughly Rs 35,000 to Rs 1.2 lakh. ICSI, PGT-A, frozen transfers, and donor cycles add further costs, so ask for a written breakdown before you start.

Will egg retrieval reduce my egg supply or bring on early menopause?

No. Stimulation collects follicles that your body would otherwise have lost that month through natural atresia. It does not draw on your future supply, and current evidence does not link IVF to early menopause. Your ovarian reserve continues to decline at its natural, genetically set rate.

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