What Is IVF? A Step-by-Step Guide
Many couples attempting to conceive face doubts, confusion, and disappointment. IVF (in vitro fertilisation) may be advised if other fertility treatments fail.
Exactly what is IVF? How does IVF work? What happens, and how long does IVF take?
This handbook covers the IVF process from consultation and ovarian stimulation to egg harvesting, fertilisation, embryo transfer, and pregnancy test.
What Is IVF?
IVF is an assisted reproductive therapy that fertilises ovarian eggs with sperm in a lab. To start a pregnancy, the embryo is transferred to the uterus.
The term "in vitro" means "in glass", since fertilisation occurs in a lab.
IVF may be explored for fallopian tube disorders, sperm-related fertility issues, endometriosis, ovulation issues, unexplained infertility, or failed fertility therapies. IVF can also reduce the chance of genetic problems in children by using donor eggs or sperm.
Importantly, IVF is not one operation. The therapy strategy is meticulously organised and varies by person or couple.
How Does IVF Work?
In natural conception, eggs from the ovary can be fertilised by sperm in the fallopian tube. After that, the embryo may implant in the uterus.
IVF involves multiple controlled steps in a fertility clinic and lab.
The Basic Journey
Monitoring ovarian stimulation → Egg retrieval → Sperm collection → Fertilisation → Embryo development → Embryo transfer → Pregnancy test
The IVF Process Step by Step
Let us examine each stage in depth.
Step 1: Fertility Assessment and Treatment Planning
Your fertility doctor will evaluate your situation and prescribe a treatment strategy before IVF.
Your medical and fertility history, blood tests, ultrasound scans, and ovarian reserve may be reviewed. Semen analysis may be advised for male-factor infertility.
This stage goes beyond deciding if IVF is right. It helps the fertility team choose a treatment regimen, drugs, and monitoring schedule.
Before starting therapy, your doctor will discuss the method, advantages, risks, and alternatives.
Step 2: Ovarian Stimulation
One egg normally dominates and is expelled during ovulation in a natural menstrual cycle. Fertility drugs stimulate the ovaries to create many follicles for IVF to retrieve mature eggs.
Medication schedules vary per treatment approach.
Ultrasound scans and blood tests help the fertility team track follicle growth during this period. Medication doses are adjusted based on ovarian response.
Monitoring helps ensure an adequate response while lowering the risk of problems such as ovarian hyperstimulation syndrome.
Step 3: Trigger Injection and Egg Retrieval
A final medicine, called the "trigger", helps the eggs mature when the follicles have grown enough.
A precise timing is then set for egg retrieval.
A fertility professional uses ultrasonography and a small needle to retrieve eggs from ovarian follicles. The procedure is usually accompanied by medicines for comfort.
The embryology lab quickly checks the recovered eggs for maturity and fertilisation.
Individual egg retrieval varies greatly. More eggs do not guarantee a successful pregnancy, because various biological steps remain after retrieval.
Step 4: Sperm Collection and Preparation
Male partners typically give sperm samples during egg retrieval. When appropriate, donor or frozen sperm can be used.
The lab prepares the sample and selects fertile sperm.
Traditional IVF or ICSI (intracytoplasmic sperm injection) is then decided by the embryology team.
One sperm is put into a mature egg during ICSI. In cases of male-factor infertility or failed fertilisation, it may be advised.
Step 5: Fertilisation in the Laboratory
Then comes fertilisation.
In conventional IVF, sperm and eggs are mixed in a lab to fertilise.
ICSI involves an embryologist injecting one sperm into the egg.
The eggs are then watched to determine which have fertilised.
A fertilised egg is an embryo. In the next days, the embryology team monitors embryo progress.
Not all retrieved eggs fertilise, and not all fertilised eggs develop. This is standard in IVF and one reason why the number of eggs recovered is not the same as the number of embryos available for transfer.
Step 6: Embryo Development and Selection
After fertilisation, embryos develop in the lab.
Some embryos reach the blastocyst stage around day five or six. Developmental factors may determine embryo transfer, depending on treatment plan and clinical situations.
Depending on quality and clinic regulations, eligible embryos may be kept for future use after the planned transfer.
In some cases, the fertility doctor may recommend embryo genetic testing.
Step 7: Embryo Transfer
Embryo transfer is crucial to IVF.
A thin, flexible catheter is inserted through the vagina and cervix to place an embryo into the uterus. The technique requires little anaesthetic and is short.
The embryo is placed in the uterus to implant in the uterine lining and develop.
Multiple embryo transfers raise the possibility of multiple pregnancy and its problems, so they are carefully chosen. Your fertility specialist will discuss the best approach for you.
Step 8: The Wait and the Pregnancy Test
Waiting after embryo transfer is emotional for many patients.
Implantation takes time and raises pregnancy hormones.
Ask your fertility clinic when to test for pregnancy. Tests taken too early can be difficult to interpret, so follow your fertility team's advice.
The clinic may arrange monitoring and an ultrasound to confirm pregnancy and check early development if the test is positive.
If the result is negative, your fertility specialist can explain what happened during the cycle and whether another strategy or further study is needed.
How Long Does the IVF Process Take?
A full IVF cycle can take weeks, depending on the protocol, drugs, monitoring, and whether embryos are transferred fresh or frozen.
Patients may need more time for investigations, treatment, or uterine preparation before embryo transfer.
Your fertility specialist should give you a personalised treatment calendar before the cycle.
How Likely Is IVF Success?
Patients often enquire, "Will IVF work for me?"
There is no universal success rate.
The woman's age, infertility aetiology, ovarian reserve, sperm factors, embryo development, and treatment strategy can affect success.
Instead of relying on overall IVF success statistics, speak to a fertility doctor about your own prognosis.
Do IVF Risks Exist?
Although IVF is commonly used and safe, it carries risks like any medical procedure.
Ovarian hyperstimulation syndrome, egg retrieval problems, multiple pregnancies, and ectopic pregnancy are examples. Individual risk likelihood and severity differ.
Your fertility physician should discuss risks and benefits before therapy.
IVF Is a Journey, Not Just a Procedure
Although medically difficult, IVF is personal for patients.
Knowing the process helps ease the journey. The first fertility consultation, ovarian stimulation, egg harvesting, fertilisation, embryo development, and transfer all have a function.
Above all, IVF should never be a one-size-fits-all procedure. The ideal plan depends on your age, medical history, reproductive factors, and treatment outcomes.
Consult a fertility doctor before contemplating IVF to analyse your situation and discuss treatment alternatives.
IVF can be simplified step by step with the correct information, customised medical supervision, and a helpful fertility team.