IVF Explained: The Process, Success Rates, and How to Prepare

If you're reading this, you're probably staring down a hard question. Will IVF work for me? That's a fair thing to ask. IVF (in vitro fertilisation, a lab method that helps you get pregnant) helps many people become parents. But it doesn't work every time. The odds change a lot. Age and health both play a big part.

This guide walks you through the IVF process in plain language. You'll learn what happens at each step. You'll see the real success rates for different ages. You'll learn what IVF costs in India. And you'll learn how to get your body and mind ready. Every hard word gets explained here. There are no scare tactics, just facts.

What is IVF?

The idea in one paragraph

IVF stands for in vitro fertilisation. "In vitro" is Latin for "in glass." It's an old way of saying "in a lab dish." Here's how it works. A doctor takes an egg from the woman. A doctor takes sperm from the man, or from a donor. The egg and sperm meet outside the body, in a lab. If fertilisation happens, the fertilised egg is called an embryo. The embryo grows in the lab for a few days. Then it's placed back into the womb (uterus, the organ where a baby grows). If it attaches to the uterus wall, pregnancy begins.

In short, IVF has four big steps. Doctors stimulate the ovaries to make more eggs. Then they collect the eggs. Then they fertilise them in a lab. Then they transfer an embryo into the womb.⁴ That's the whole idea. Everything else in this article explains how each step actually works, and what it feels like from the inside.

Who IVF is for

Doctors usually suggest IVF after simpler treatments haven't worked. Sometimes they suggest it right away, if they already know simpler treatments won't help your specific problem. Here are the most common reasons people turn to IVF:

• Blocked or damaged fallopian tubes (the tubes that carry eggs to the womb). Scarring from an old infection or surgery can block them completely.
• Low sperm count or poor sperm movement, sometimes linked to lifestyle, sometimes to no clear cause at all
• Ovulation problems (when the ovaries don't release an egg regularly), often caused by PCOS or a thyroid problem
• Endometriosis (a condition where tissue like the womb lining grows outside the womb, causing pain and scarring)
• Unexplained infertility, where every test comes back normal but pregnancy still isn't happening
• Age-related fertility decline, often in women over 35
• Genetic conditions that a couple wants to avoid passing on to a child
• Same-sex couples or single people using donor eggs or donor sperm

You don't need to wait years before asking about IVF. If you're over 35 and have tried for six months without success, see a specialist soon. If you're under 35, one year of trying is the usual marker. Waiting too long can cost you time you can't get back, especially if your egg count is already low.

How does the IVF process work, step by step?

A full IVF cycle has six main stages. Each one takes a different amount of time. Together, they usually span four to six weeks, from your first injection to your pregnancy test. Some women feel fine through all of it. Others find parts of it exhausting. Both reactions are completely normal.

Step 1: Ovarian stimulation

Normally, your body releases one egg a month. IVF needs more eggs than that. Not every egg fertilises, and not every embryo survives. So you'll take hormone injections for about 8 to 14 days. These injections tell your ovaries to grow several eggs at once, instead of just one. Most women give these injections to themselves, in the belly or thigh, using a thin needle. It stings for a second, then it's over. Your clinic will show you exactly how before you start.

You'll have blood tests and ultrasound scans every few days during this stage. The doctor checks how many follicles (small fluid sacs, each holding one egg) are growing, and how big they are. This helps time the next step correctly. During stimulation, many women notice bloating, mild pelvic ache, and breast tenderness. Your belly might feel tight or swollen by the end of this stage. This happens especially if you're growing a lot of follicles. It's expected, and it usually settles within a week or two after egg collection.

Step 2: Egg retrieval

Once the follicles are ready, you get a "trigger shot," a final injection that ripens the eggs. About 36 hours later, the doctor collects the eggs. This is a short procedure done under sedation (medicine that makes you sleepy and pain-free). It usually takes 15 to 20 minutes from start to finish.

A thin needle passes through the vaginal wall, guided by ultrasound. It reaches each ovary and draws out the fluid containing the eggs. You won't feel this happening, because of the sedation. You'll rest for a few hours afterward, then usually go home the same day. Someone should drive you home, since the sedation takes time to wear off. Mild cramping and bloating are common for a day or two. Some spotting is normal too. Pack loose, comfortable clothes for that day. Tight jeans on a bloated belly is not a good combination.

Step 3: Fertilisation in the lab

On the same day, the male partner (or a donor) gives a sperm sample. In the lab, embryologists (scientists trained in reproductive biology) combine the eggs and sperm. This happens in one of two ways.

• Conventional IVF: eggs and sperm are placed together in a dish and left to fertilise on their own
• ICSI (intracytoplasmic sperm injection, said "ick-see"): one single sperm is injected straight into an egg, used when sperm quality is low

By the next morning, the embryologist checks how many eggs fertilised. This is usually the first update call or message you'll get. Not every egg fertilises, even with ICSI. That's normal, and it doesn't mean anything went wrong.

Step 4: Embryo culture

The fertilised eggs are now embryos. They spend the next 3 to 6 days growing in a special incubator that copies conditions inside the womb. The lab team checks them daily under a microscope. They watch how the cells divide and grow, and grade each embryo on its quality.

Not every embryo makes it this far. Some stop growing on day 2 or 3. This can feel like a second heartbreak after a hopeful egg collection. The ones that reach day 5 or 6 form a structure called a blastocyst. That's a more developed embryo with two distinct cell types. Blastocysts are generally the strongest candidates for transfer. Your clinic will usually call on day 5 or 6. They'll tell you how many good embryos you have, and help plan the transfer.

Step 5: Embryo transfer

This is the simplest step for you physically. The doctor places one embryo (occasionally two, depending on your age and history) into your womb. A thin, soft tube passes through the cervix to do this. No sedation is usually needed. It takes just a few minutes, and feels similar to a pap smear. You might be asked to come in with a full bladder. That helps the doctor see your womb clearly on ultrasound during the transfer.

Any extra good-quality embryos can be frozen for future use. This matters a lot. It means you don't need to repeat the injections and egg collection every time you want to try again. A frozen embryo can be stored for years and used whenever you're ready.

Step 6: The two-week wait

After the transfer, you wait about 10 to 14 days before a blood test can confirm pregnancy. This stretch is often the hardest part emotionally, even though nothing medical is happening. You might be given progesterone (a hormone that supports early pregnancy) as a tablet, gel, or injection during this time. Some women feel mild cramping, spotting, or tender breasts during the wait. These can be side effects of the progesterone, early signs of pregnancy, or nothing at all. There's often no way to tell which. That uncertainty is part of what makes this wait so hard.

Try to avoid taking home pregnancy tests too early. They can give a false result, because of leftover trigger-shot hormone in your body. Wait for the clinic's blood test instead. It measures a hormone called hCG (the main pregnancy hormone) directly in your blood. That's far more accurate than a urine test taken too soon.

What are IVF success rates?

This is usually the question people care about most, and it deserves an honest answer. IVF success depends heavily on one factor above all others. That factor is your age when your eggs are collected.

Why age matters most

Egg quality drops as women get older. This isn't about how healthy or fit you are. It's simply how ovaries age. Younger eggs have fewer chromosome errors (mistakes in the genetic material inside the egg). That makes them more likely to fertilise properly and grow into a healthy pregnancy. Think of it like a photocopy of a photocopy. The more times cells have divided over the years, the more small errors tend to creep in.

IVF success falls as a woman gets older, mostly because of this drop in egg quality.⁵ UK data show this clearly. The live birth rate per embryo transferred is about 33% for women aged 18 to 34. It falls to around 4% for women aged 43 to 50.¹ Some women start a fertility cycle at 40 or older, using their own eggs. For them, the live birth rate is about 3.2% per cycle.²

Age group	Approximate IVF birth rate per embryo transferred
18–34 years	About 33%1
40 years and older (own eggs)	About 3.2% per cycle2
43–50 years	About 4%1

These numbers can feel discouraging if you're in your early 40s. But they're averages across thousands of patients. They are not a prediction for you personally. Your doctor can give you a sharper estimate. They'll look at tests like your AMH level (a hormone blood test that shows how many eggs you have left). They may also check your antral follicle count (the number of resting egg sacs seen on ultrasound). In India, many women start IVF later than in some other countries. Often, they've spent years trying on their own first. If that's you, ask your doctor for your personal numbers rather than comparing yourself to national averages.

What the numbers really mean

Clinics report success rates in different ways, and this causes a lot of confusion. Some report "per cycle started." Others report "per embryo transfer." Others report "per egg collection." These are not the same number.

A cycle can be cancelled before egg collection, if the ovaries don't respond well to stimulation. An egg collection might not lead to a transfer, if no embryos develop properly. So when you compare clinics, always ask exactly what the percentage measures. Two clinics might have similar real results. But the one quoting "per transfer" rates will look better on paper than the one quoting "per cycle started." Ask to see the number in writing, not just hear it quoted during a sales pitch.

Also ask how many cycles that number is based on. A rate built from 20 patients means much less than one built from 2,000. A small clinic with three lucky cases in a row is not the same as a large clinic with a proven track record.

Fresh vs frozen embryos

A full IVF cycle covers stimulation, egg retrieval, fertilisation, embryo culture, and embryo transfer. The embryo used can be fresh, or it can be one frozen from an earlier cycle.⁶ Many clinics today prefer to freeze all embryos. They transfer them later, in a separate cycle, rather than transferring a fresh embryo right away.

Why wait? Hormone levels right after egg collection are unusually high. This can make the womb lining less ready to accept an embryo. Giving your body a month to return to normal helps. Then a thawed embryo gets transferred. This often works just as well as a fresh one, sometimes slightly better. It also lets the clinic test the embryo for genetic issues first, if you've chosen that option. Freezing gives you flexibility too. If you feel unwell, or your lining looks thin on the scan, the clinic can simply wait. They'll pick a better month instead of rushing a fresh transfer.

What affects your chance of success?

Age is the biggest factor, but it isn't the only one. Several other things shape your odds. Some of them you can actually influence.

Egg and sperm quality

Good eggs and healthy sperm are the raw materials IVF depends on. Egg quality is mostly tied to age. Conditions like endometriosis or PCOS (polycystic ovary syndrome, a hormonal condition affecting ovulation) can also play a role.

Sperm quality matters just as much. Doctors look at count (how many sperm), motility (how well they swim), and morphology (their shape). Smoking, heavy alcohol use, obesity, and certain infections can all lower sperm quality. So can tight underwear, long hours in a hot car seat, or a high fever in the past three months. The good news is sperm renews roughly every three months. Lifestyle changes made now can improve a sample collected later. A man who quits smoking and starts exercising today may see better numbers in the next test.

Weight and lifestyle

Being significantly underweight or overweight can lower IVF success rates. Extra body fat affects hormone levels in ways that can interfere with egg development and embryo implantation. Being very underweight can stop ovulation altogether.

Most fertility specialists suggest aiming for a healthy BMI (body mass index, a measure of weight relative to height) before starting treatment, if time allows. Smoking is one of the clearest risk factors linked to poor IVF outcomes, for both partners. Quitting at least three months before starting treatment gives your body time to recover. Even cutting down gradually, with a clear quit date before stimulation starts, makes a real difference to egg and sperm quality.

The underlying cause of infertility

Why you need IVF in the first place affects your odds too. Blocked tubes with otherwise normal eggs often respond well to IVF, since the treatment bypasses the tubes entirely. Severe male-factor infertility, treated with ICSI, also has reasonably good success rates.

Cases involving very poor ovarian reserve, or repeated implantation failure with no clear cause, tend to be harder to treat. Your doctor should explain, in your specific case, which category you fall into. Ask them plainly what that means for your realistic chances, not just the general average.

How much does IVF cost in India?

A realistic price range

Cost is one of the biggest worries for Indian families considering IVF, and rightly so. A single IVF cycle in India typically costs between ₹1.5 lakh and ₹2.8 lakh in 2025.³ That range covers the core treatment: injections, monitoring, egg collection, lab fertilisation, and one embryo transfer. Metro cities like Mumbai, Delhi, and Bangalore tend to sit at the higher end of that range. Tier-2 cities are often cheaper, though the quality of care can still be excellent.

Prices vary by city, by clinic reputation, and by the specific drugs your body needs. Some women need higher doses of stimulation medicine than others, which pushes the cost up. If you need ICSI instead of conventional IVF, that typically adds to the bill too. A younger woman with a good egg reserve may need a lower drug dose. That means she may pay less than an older woman who needs stronger stimulation to get the same number of eggs.

Hidden extras to ask about

The headline price rarely covers everything. Before you commit to a clinic, ask specifically about these possible add-ons:

• Pre-treatment tests for both partners, including hormone panels and semen analysis
• Freezing and yearly storage fees for extra embryos
• Genetic testing of embryos (PGT), if you choose it
• Donor egg or donor sperm fees, if needed
• A second cycle, if the first doesn't result in pregnancy
• Medicines, which can cost ₹40,000 to ₹1 lakh on their own depending on your dose
• ICSI charges, if standard IVF fertilisation isn't recommended for you

Ask for a written, itemised quote before you start. A clinic that can't or won't break down its costs clearly is a warning sign. Also ask what happens, financially, if your cycle is cancelled partway through. This does happen, and it shouldn't leave you paying full price for an incomplete treatment. Many government hospitals and some trusts in India also run subsidised IVF programmes. It's worth asking your specialist whether you qualify, especially if cost is the main barrier holding you back.

How to prepare for IVF

Before you start

Preparation usually begins a few months before your first injection. Both partners will need blood tests, infection screening, and a review of any existing health conditions. Women often get an ultrasound to count antral follicles, giving the doctor a sense of your ovarian reserve. You may also be asked to check your thyroid levels and vitamin D. Both can quietly affect fertility if they're out of range.

Bring your medical history to the first appointment. Past surgeries, pregnancies, miscarriages, and any family history of genetic conditions all matter. The more complete a picture your doctor has, the better they can plan your specific protocol (the exact combination and dose of medicines used for you). Write down dates if you can remember them, even roughly. It helps the doctor build an accurate timeline fast.

Diet and habits

There's no magic IVF diet, but general good habits do help your body cope with treatment. Aim for balanced meals with enough protein, vegetables, and whole grains. Dals, eggs, paneer, and fish are all good protein choices if they suit your diet. Cut back on processed food and sugary drinks where you can.

Folic acid supplements are usually recommended, starting at least a month before treatment. Limit caffeine to one or two cups a day. Stop alcohol and smoking completely, for both partners, well before the stimulation phase begins. Gentle exercise like walking or light yoga is fine. Avoid starting any intense new workout routine right before or during stimulation, since swollen ovaries need to be treated gently. Skip heavy gym lifting, running, or high-impact classes once injections start. Switch back once your doctor gives the go-ahead.

Looking after your mind

IVF is physically demanding, but the emotional load often surprises people more. Sleep well where you can. Keep at least a few normal routines going, like meeting friends or continuing a hobby. Don't let your whole life shrink down to appointments and injections. Small things help too. Keep a simple calendar of scan dates so you're not caught off guard. Tell one trusted friend what you're going through, so you're not carrying it alone.

Talk to your partner honestly about how each of you is coping. Many clinics in India now offer counselling as part of the treatment package. Take it up if it's offered, even if you feel fine. It helps to have that support in place before things get hard, not after.

The emotional side of IVF

Nobody warns you enough about this part. The injections are uncomfortable, but the waiting is often worse. The two-week wait after transfer can feel endless. Every small body sensation gets analysed for meaning. A twinge in your belly. A headache. Feeling extra tired. Your mind will search for clues, even though there usually aren't any to find yet.

It's common to feel a strange mix of hope and dread at the same time. Some days you'll feel confident. Other days you'll want to cancel every plan and stay in bed. Both reactions are normal.

Relationships can strain under the pressure too, especially when partners cope differently. One person might want to talk about it constantly. The other might want to think about anything else. Neither approach is wrong. Naming this difference out loud, early on, usually helps more than pretending it isn't there.

If a cycle doesn't work, give yourself real time to grieve before deciding on next steps. This is a genuine loss, even though nothing visible happened. Well-meaning relatives may ask "any good news yet?" without knowing how much that question can sting. It's okay to give a short, firm answer and change the subject. Support groups, in person or online, connect you with people who understand this specific kind of waiting and disappointment in a way friends and family sometimes can't.

What are the risks and side effects?

IVF is generally safe, but it isn't risk-free. Knowing what to expect helps you tell normal discomfort apart from something that needs a call to your clinic.

• Bloating, mild cramping, and breast tenderness during stimulation, caused by rising hormone levels
• Mood swings, similar to strong premenstrual symptoms, from the hormone medicines. You might cry at an advert one minute and laugh the next
• Ovarian hyperstimulation syndrome (OHSS), a rare but serious reaction where the ovaries swell and leak fluid. It causes pain, bloating, nausea, and in severe cases breathing difficulty
• Mild spotting or cramping after egg retrieval, usually settling within a day or two
• A small risk of infection or bleeding at the egg retrieval site
• A higher chance of twins or triplets if more than one embryo is transferred, which carries its own risks, like early labour
• A slightly higher rate of ectopic pregnancy (when the embryo implants outside the womb, usually in a fallopian tube), which needs urgent medical care

Call your clinic right away if you get severe belly pain, rapid weight gain over a day or two, severe bloating, or trouble breathing after stimulation or egg retrieval. These can be signs of OHSS and need prompt treatment. Don't wait to see if it passes on its own. It's always better to make an unnecessary call than to ignore a real warning sign.

Most side effects are manageable and temporary. Your clinic should walk you through exactly what's normal for your specific medicine dose, and what would count as a reason to call them.

Common myths about IVF

Misinformation adds stress on top of an already stressful process. Here are some myths worth clearing up.

• Myth: IVF always works if you try enough times. Truth: success depends heavily on age and the cause of infertility. Repeating cycles helps. But it doesn't guarantee a result for everyone.
• Myth: IVF babies have more health problems. Truth: most IVF babies are born healthy. Slightly higher risks linked to IVF are usually tied to twin or triplet pregnancies, not to the IVF process itself.
• Myth: You should rest completely in bed after embryo transfer. Truth: normal daily activity is fine. Studies haven't shown that strict bed rest improves success rates. Lying still all day doesn't help implantation.
• Myth: IVF is only for older women. Truth: IVF is used at every reproductive age. Tube blockage, male-factor infertility, and many other reasons have nothing to do with age.
• Myth: Stress alone causes infertility, and relaxing will fix it. Truth: stress is a normal reaction to a hard situation, not the cause of it. Blaming yourself for "not relaxing enough" adds guilt without helping your odds.
• Myth: One IVF cycle uses up all your remaining eggs. Truth: stimulation collects eggs that would have been lost that month anyway. It doesn't use up eggs from future cycles.
• Myth: A frozen embryo has less chance than a fresh one. Truth: modern freezing methods keep embryos in excellent condition. A frozen embryo transfer often works just as well as a fresh one, sometimes better.

When should you see a fertility specialist?

You don't need to wait until you're desperate to book this appointment. General guidance suggests seeing a specialist if you're under 35 and haven't conceived after a year of trying. See one sooner, at six months, if you're 35 or older.

See a doctor sooner, regardless of age, if you have known risk factors. These include irregular or absent periods, a history of pelvic infections, endometriosis, previous surgery near the reproductive organs, or a partner with a known sperm issue. Heavy, painful periods that keep you home from work are also worth mentioning early. They can point to endometriosis.

A first consultation doesn't commit you to IVF. It usually starts with basic tests, hormone blood work, an ultrasound, and a semen analysis for the male partner. From there, your gynaecologist (a doctor who specialises in female reproductive health) can tell you whether simpler treatments are worth trying first. Or whether IVF makes more sense given your specific situation.

Bring your questions to that first visit, written down if that helps you remember them. Ask about success rates for someone your age and diagnosis. Ask about realistic costs, and how many cycles most patients in your situation typically need. Ask what a typical timeline looks like, from first scan to pregnancy test. A good specialist will answer directly, without dodging the harder numbers.

Worried about your symptoms? You can consult a gynaecologist on SpotMedics — compare gynecologists, read what each doctor treats, and book an appointment free in about a minute.