The IVF process step by step
# The IVF Process Step by Step
Overview of IVF
In vitro fertilization (IVF) is a medical procedure where eggs are retrieved from your ovaries, fertilized with sperm in a laboratory, and then transferred back into your uterus. The entire process typically takes 4–6 weeks from start to finish, though this varies based on individual circumstances and clinic protocols.
Understanding each stage helps you prepare mentally and physically, manage expectations, and ask informed questions with your fertility specialist.
Stage 1: Ovarian Stimulation (Days 1–10)
This is the first and longest preparation phase of IVF treatment.
What Happens
Your fertility doctor will prescribe injectable medications (gonadotropins) to stimulate your ovaries to produce multiple eggs rather than the single egg typically released during a natural cycle. This increases your chances of having viable embryos to work with.
You'll begin injections on day 3–5 of your menstrual cycle and continue for 8–14 days. Most people self-administer these injections daily at home, usually in the evening.
Timeline
- Days 1–2: Start your period; contact your clinic to schedule baseline ultrasound and bloodwork
- Days 3–5: Begin hormone injections after baseline appointment
- Days 8–10: Return to clinic for monitoring ultrasound and hormone levels
What to Expect
- Physical side effects: Mild bloating, headaches, mood changes, and injection site soreness are common
- Monitoring: You'll have 2–3 ultrasounds during this phase to track follicle growth (follicles are the fluid-filled sacs containing eggs)
- Medication adjustments: Your doctor may increase or decrease medication doses based on your response
- Trigger shot: Once follicles reach optimal size (typically 18–20mm), you'll receive a final injection (trigger shot) to prepare eggs for retrieval, usually 34–36 hours before the procedure
Practical Tips
- Set phone reminders for injection times
- Keep medications refrigerated (except certain types—ask your clinic)
- Use ice packs before injecting to minimize discomfort
- Track your symptoms in a journal to discuss with your doctor
- Maintain normal activities—bed rest is not necessary unless advised
Stage 2: Egg Retrieval (Day 10–11)
What Happens
Egg retrieval is a minor surgical procedure performed under sedation. Your doctor uses an ultrasound-guided needle to aspirate (gently suction) fluid from each mature follicle, collecting the eggs inside.
Timeline
- Trigger shot evening: Administered exactly 34–36 hours before retrieval
- Day of retrieval: Procedure lasts 15–20 minutes
- Same day: Eggs are assessed in the laboratory for maturity and quality
What to Expect
- You'll receive IV sedation—you'll be drowsy but not fully unconscious
- Mild cramping and spotting afterward is normal
- Plan for someone to drive you home (you cannot drive after sedation)
- Most people can return to light activities within 24 hours
- Some ovarian tenderness may persist for several days
Practical Tips
- Avoid strenuous exercise for 24–48 hours post-retrieval
- Stay well-hydrated—drink plenty of water and electrolyte drinks
- Eat protein-rich foods to support recovery
- Take prescribed pain medication if needed (typically over-the-counter strength)
- Wear comfortable, loose clothing to your appointment
Stage 3: Fertilization (Day 0–1 After Retrieval)
What Happens
In the laboratory, eggs are combined with sperm to facilitate fertilization. Depending on sperm quality and count, fertilization occurs through:
- Conventional insemination: Sperm and eggs are placed together in a culture dish
- Intracytoplasmic sperm injection (ICSI): A single sperm is injected directly into each egg (used when male factor infertility is present or sperm quality is low)
The lab will monitor fertilization overnight and report results the following day.
Timeline
- Day of retrieval: Eggs and sperm are combined
- Next morning: Fertilization results are reported (typically 16–20 hours later)
What to Expect
- Number of mature eggs retrieved
- Number of eggs successfully fertilized
- Fertilization method used
Fertilization rates typically range from 50–75%, though individual results vary.
Stage 4: Embryo Culture and Development (Days 1–5)
What Happens
Fertilized eggs (now called embryos) are cultured in specialized laboratory conditions for 5–6 days. The lab monitors their development daily, looking for proper cell division and growth patterns.
Timeline
- Days 1–3: Embryos should divide into 4–8 cells
- Days 4–5: Embryos develop into blastocysts (fluid-filled structures with an inner cell mass destined to become the fetus)
What to Expect
- Daily cell division counts and grading
- Recommendations on whether to transfer on day 3, day 5, or freeze for later use
- Information about any genetic testing if you chose preimplantation genetic testing (PGT)
Not all embryos will develop normally—this is natural. By day 5, you may have fewer embryos than you had on day 1.
Stage 5: Embryo Transfer (Day 3, 5, or 6)
What Happens
Your doctor transfers one or more embryos into your uterus through a thin catheter passed through the cervix. The procedure is similar to a pap smear—usually painless and requires no anesthesia.
Timeline
Day 3 transfer: Earlier option, sometimes used when few embryos develop normally
Day 5–6 transfer: More common; allows better embryo selection and higher implantation rates per transferred embryo
What to Expect
- The procedure takes 5–10 minutes
- A full bladder helps visualization—you'll be asked to drink water beforehand
- You may see the embryo on ultrasound during transfer
- Light spotting is normal
- Rest for 24 hours post-transfer (full bed rest is not required)
- You'll receive a photo of your transferred embryo and information about remaining frozen embryos (if any)
Practical Tips
- Plan your calendar so you can rest the day of transfer and the next day
- Avoid strenuous exercise and heavy lifting for one week
- Avoid hot baths and hot tubs for a few days
- Avoid vaginal intercourse for a few days post-transfer
- Stay positive but realistic—stress doesn't affect implantation rates
Stage 6: The Two-Week Wait (Days 1–14 After Transfer)
What Happens
After transfer, the embryo must implant into the uterine lining. This typically occurs 6–10 days after transfer. During this time, you'll take progesterone supplements (via injection, oral medication, or vaginal insert) to support implantation.
Timeline
- Days 1–6: Embryo begins implantation process
- Days 6–14: Pregnancy hormone (hCG) begins rising if implantation occurs
- Day 14: Pregnancy test day (counting from day of transfer)
What to Expect
- Progesterone side effects: bloating, breast tenderness, mood changes, fatigue
- Pregnancy symptoms or no symptoms (neither indicates success or failure)
- Anxiety and uncertainty
- Intense emotions as test day approaches
Important: Symptoms during the two-week wait are not reliable indicators of pregnancy success.
Practical Tips
- Keep a mental health perspective—consider counseling or support groups
- Continue progesterone exactly as prescribed (do not stop early)
- Avoid excessive caffeine
- Maintain normal daily activities
- Limit pregnancy tests at home (false negatives are common before day 10 post-transfer)
- Don't compare your experience to others' experiences