The Complete IVF Guide
In Vitro Fertilisation (IVF) is the most effective assisted reproductive technology, accounting for over 99% of all ART cycles worldwide. This guide walks you through every stage of an IVF cycle, what the science says about success rates, and how to prepare.
What Is IVF?
IVF involves stimulating the ovaries to produce multiple eggs, retrieving those eggs, fertilising them with sperm in the laboratory, and transferring one or more resulting embryos into the uterus. The process takes approximately 2–3 weeks per cycle.
Who Is IVF Recommended For?
Per ASRM 2023 indications:
- Blocked or damaged fallopian tubes
- Moderate-to-severe endometriosis
- Severe male factor infertility (used with ICSI)
- Ovulation disorders not responding to oral medications
- Diminished ovarian reserve (time-sensitive — earlier is better)
- Unexplained infertility after failed IUI
- Women over 38 (IVF is more time-efficient than IUI)
- Recurrent pregnancy loss with genetic testing (PGT-A/PGT-M)
- Same-sex couples and single individuals
Step-by-Step IVF Process
Step 1 — Baseline Assessment (Day 2–3 of cycle) Blood tests (FSH, LH, E2, AMH) and transvaginal ultrasound to confirm antral follicle count and check for ovarian cysts. Results guide medication dosing.
Step 2 — Ovarian Stimulation (Days 2–12 approximately) Daily injectable FSH (gonadotropins — Gonal-F, Menopur, Fostimon) stimulates multiple follicles to grow simultaneously. The aim is to develop 8–15 mature follicles. A GnRH antagonist (Cetrotide, Orgalutran) is added to prevent premature ovulation (LH surge). Monitoring ultrasounds every 2–3 days assess follicle growth and endometrial thickness.
Step 3 — Trigger Injection When the lead follicles reach 17–20mm, a trigger injection (hCG — Ovitrelle, Pregnyl — or GnRH agonist) initiates final egg maturation. Egg retrieval is scheduled exactly 34–36 hours later.
Step 4 — Egg Retrieval (Oocyte Pick-Up, OPU) A minor surgical procedure under sedation (15–20 minutes). A thin needle guided by transvaginal ultrasound aspirates follicular fluid containing the eggs. Most patients go home the same day with mild cramping.
Step 5 — Sperm Collection and Preparation The male partner provides a semen sample the same morning, which is processed by the laboratory. If the male has azoospermia, surgically retrieved sperm (TESE/PESA) is used.
Step 6 — Fertilisation In conventional IVF, 50,000–100,000 sperm are placed with each egg; fertilisation occurs naturally. In ICSI (Intracytoplasmic Sperm Injection), a single sperm is injected directly into each egg. ICSI is used for male factor infertility, poor previous fertilisation, and increasingly for all cycles. Fertilisation is confirmed after 16–18 hours.
Step 7 — Embryo Culture (Days 3–5) Fertilised eggs (zygotes) develop in the incubator. Most clinics culture to blastocyst stage (Day 5–6) — blastocysts have higher implantation rates than Day 3 embryos (40–60% vs 20–35% per transfer per ESHRE 2023).
Step 8 — Embryo Biopsy (PGT-A/PGT-M, if indicated) A small number of cells from the trophectoderm (outer cell layer) are biopsied at blastocyst stage for genetic testing. PGT-A screens for chromosomal abnormalities (aneuploidy); PGT-M tests for specific inherited conditions. Results take 7–14 days, requiring an embryo freeze.
Step 9 — Embryo Transfer One (or sometimes two) embryo(s) are placed into the uterus via a thin catheter — a painless procedure similar to a cervical smear. Single embryo transfer (SET) is recommended by ASRM and ESHRE for most patients to minimise twin pregnancy risk.
Step 10 — The Two-Week Wait Progesterone support (pessaries or injections) maintains the uterine lining. A pregnancy blood test (beta-hCG) is performed approximately 11–14 days after transfer.
IVF Success Rates
Success rates depend primarily on age (egg quality) and embryo quality. Per ESHRE 2023 European registry data (live birth rate per egg collection):
| Age | Live Birth Rate per Egg Collection |
|---|---|
| Under 35 | 40–50% |
| 35–37 | 30–40% |
| 38–40 | 20–30% |
| 41–42 | 10–15% |
| 43–44 | 5–8% |
| 45+ | <3% (own eggs); 40–50% (donor eggs) |
Cumulative success rates (across multiple cycles) are significantly higher — 3 complete IVF cycles deliver cumulative live birth rates of 60–70% in women under 40 (ESHRE MARK II study 2023).
IVF Risks
- Ovarian Hyperstimulation Syndrome (OHSS): Risk 1–2% for severe OHSS. GnRH antagonist protocols and trigger modification have significantly reduced risk. PCOS patients have higher risk.
- Multiple pregnancy: SET minimises this to ~2% (similar to natural conception)
- Egg retrieval complications: Bleeding, infection — rare (<0.5%)
- Failed fertilisation: 5–10% of cycles
- No embryo transfer: Due to poor fertilisation or no blastocysts developing — affects 20% of cycles in women over 40
IVF Costs in India (2025)
| Component | Cost Range (INR) |
|---|---|
| Basic IVF cycle | ₹1,50,000 – ₹2,50,000 |
| IVF with ICSI | ₹2,00,000 – ₹3,00,000 |
| Medications (gonadotropins) | ₹50,000 – ₹1,50,000 |
| PGT-A (per biopsy) | ₹40,000 – ₹80,000 |
| Frozen embryo transfer (FET) | ₹50,000 – ₹1,00,000 |
| Donor egg IVF | ₹2,50,000 – ₹4,00,000 |
Prices vary significantly by city and clinic quality. Always ask for all-inclusive pricing including medications, monitoring, and FET.
Reference: ASRM Practice Committee — In vitro fertilization (IVF), 2023. ESHRE Guideline: Ovarian Stimulation for IVF/ICSI, 2019 (updated 2023). ICMR ART Guidelines, 2021.
Frequently Asked Questions
How many IVF cycles does it typically take to get pregnant?▾
Most successful IVF pregnancies occur within 3 cycles. Per ESHRE MARK II data, cumulative live birth rates after 3 cycles are 60–70% for women under 40. The chance per individual cycle depends heavily on age — younger women have higher per-cycle success rates. A fresh + 2 frozen transfers from one egg collection can constitute 2–3 attempts.
Is IVF painful?▾
The daily injections are mildly uncomfortable but manageable. Egg retrieval is performed under sedation and most patients feel cramping similar to period pain afterwards. The embryo transfer procedure is typically painless. The most uncomfortable part for many patients is the emotional stress of waiting for results.
What is the difference between IVF and ICSI?▾
In conventional IVF, sperm and eggs are placed together in a dish and fertilisation occurs naturally. In ICSI (Intracytoplasmic Sperm Injection), a single sperm is injected directly into each egg. ICSI is used for male factor infertility, low sperm counts, or previous failed fertilisation. Most clinics now use ICSI for all cycles.
Can I do IVF at 40?▾
Yes. Women aged 40–42 have a 15–25% live birth rate per IVF cycle using their own eggs. Success declines significantly after 43. For women over 42–43, donor egg IVF offers significantly higher success rates (40–50% per transfer) because donor eggs are typically from women under 30. Age of the egg, not the uterus, is the primary determinant of IVF success.
What is a frozen embryo transfer (FET)?▾
After an egg collection, surplus high-quality embryos are vitrified (frozen at ultra-rapid speed) and stored. A frozen embryo transfer (FET) thaws and transfers one embryo in a subsequent cycle, avoiding the need for another egg collection. Vitrified blastocyst survival rates exceed 95%. In many cases, frozen transfers have similar or better outcomes than fresh transfers due to better uterine lining preparation.