A complete, honest guide to In Vitro Fertilisation (IVF) — what it is, who it's for, exactly how the process works, and what to realistically expect — explained by Dr. Kavya P, Consultant Fertility & IVF Specialist.
In Vitro Fertilisation (IVF) is the most well-established form of assisted reproductive technology. "In vitro" literally means "in glass" — referring to fertilisation that happens in a laboratory dish rather than inside the body. During IVF, eggs are retrieved from the ovaries and combined with sperm under controlled laboratory conditions. If fertilisation is successful, the resulting embryo is cultured for several days before being transferred into the uterus, where it may implant and develop into a pregnancy.
IVF was first successfully performed in 1978 and has since helped millions of couples worldwide conceive. Over four decades of refinement — better stimulation protocols, embryo culture techniques, and laboratory standards — have made it dramatically safer and more effective than in its early years.
Unlike IUI, which simply places sperm closer to the egg inside the body, IVF takes both the fertilisation step and the earliest days of embryo development outside the body, under direct observation. This allows the embryology team to select the most viable embryo before it is transferred, which is one reason IVF is recommended for more complex fertility challenges.
IVF is not always the first step in fertility treatment — many couples are appropriately treated with lifestyle changes, ovulation induction, or IUI first. However, IVF becomes the recommended option in several specific situations:
A detailed consultation and diagnostic workup — covering ovarian reserve (AMH), tubal status, and semen analysis — is the only reliable way to know whether IVF is the right next step for your specific situation.
While every protocol is personalised, a standard IVF cycle follows six broad stages over roughly four to six weeks.
The cycle begins with daily hormone injections (gonadotropins) to stimulate the ovaries to produce multiple mature eggs in a single cycle, instead of the single egg released naturally each month. This phase typically lasts 8–14 days and is closely monitored through:
Once a sufficient number of follicles reach the right size, a "trigger" injection is given to finalise egg maturation roughly 36 hours before retrieval.
Egg retrieval is a short, minimally invasive procedure performed under sedation or light anaesthesia, typically taking 15–20 minutes. A thin needle, guided by transvaginal ultrasound, is used to aspirate fluid (and the eggs within it) from each mature follicle. Most patients go home the same day and can resume light activity within a day or two.
On the same day, a fresh semen sample is collected from the male partner (or a previously frozen sample is thawed). The lab processes the sample to isolate the healthiest, most motile sperm for fertilisation.
Fertilisation happens in one of two ways:
Fertilisation is confirmed under the microscope roughly 16–18 hours later.
Fertilised eggs (now embryos) are cultured in an incubator for 3 to 6 days, with the embryology team tracking their development daily. Embryos that reach the blastocyst stage (day 5–6) generally show the highest implantation potential, which is why many clinics prefer blastocyst-stage transfer where possible. Where indicated, embryos may also undergo preimplantation genetic testing (PGT) at this stage.
The selected embryo (or embryos, per clinical recommendation and patient choice) is transferred into the uterus using a thin, soft catheter — a quick, generally painless procedure that does not require anaesthesia. Any remaining good-quality embryos can be frozen for future use.
About 10–14 days after embryo transfer, a blood test measuring beta-hCG confirms whether implantation has occurred. A follow-up ultrasound 2–3 weeks later confirms a viable pregnancy with a visible heartbeat.
IVF success rates are most strongly influenced by the woman's age and ovarian reserve, along with sperm quality, embryo quality, and uterine receptivity. As a general pattern across published data, IVF success rates tend to be highest for women under 35 and gradually decline with age, particularly after 38–40. Because every case is different, Dr. Kavya provides a personalised success rate estimate based on your specific AMH, antral follicle count, and overall diagnostic profile, rather than relying on generic averages.
IVF is a well-studied and generally safe procedure, but like any medical treatment it carries some risks, which your doctor will monitor closely:
Detailed history review and diagnostic planning for both partners.
AMH, hormonal panel, ultrasound and semen analysis to confirm IVF is the right path.
A personalised injection protocol with close ultrasound and hormone monitoring.
Egg retrieval, fertilisation (IVF/ICSI) and embryo culture under embryology supervision.
Embryo transfer, pregnancy testing, and continued support into the first trimester.
IVF (In Vitro Fertilisation) is an assisted reproductive technique where eggs are retrieved from the ovaries and fertilised with sperm in a laboratory. The resulting embryo is cultured for a few days and then transferred into the uterus, where it can implant and develop into a pregnancy.
IVF is generally recommended for blocked or damaged fallopian tubes, moderate-to-severe male factor infertility, diminished ovarian reserve, endometriosis, unexplained infertility after failed IUI cycles, or when using donor eggs, sperm, or a gestational carrier.
A typical IVF cycle takes about 4–6 weeks from the start of ovarian stimulation to the embryo transfer, with a pregnancy test roughly two weeks after transfer.
Most steps involve mild discomfort rather than significant pain. Stimulation injections may cause minor bruising, and egg retrieval is performed under sedation or light anaesthesia, so the procedure itself is not felt.
IVF success rates vary by age, ovarian reserve and diagnosis, generally being highest for women under 35 and declining with age. Your doctor can give you a personalised estimate based on your specific test results.
IVF costs in Chennai vary depending on the protocol used, medication dosage, additional procedures like ICSI or PGT, and number of cycles needed. Ask for a detailed cost breakdown during your consultation.
Possible risks include ovarian hyperstimulation syndrome (OHSS), multiple pregnancy (if more than one embryo is transferred), and the general risks of egg retrieval such as bleeding or infection, all of which are actively monitored and managed.
No fertility treatment can guarantee pregnancy. IVF significantly improves the probability of conception for many causes of infertility, but outcomes depend on age, egg and sperm quality, and underlying diagnosis.