Starting IVF can feel like a major step, particularly when you have already spent time waiting, wondering and looking for answers. IVF screening tests give your fertility team a clearer picture of the factors that may affect treatment, helping them plan care around you rather than relying on assumptions. They are not a judgement on your fertility or a guarantee of an outcome. They are a practical, clinically useful starting point.
Most tests are straightforward blood tests, ultrasound scans and, where relevant, semen analysis. Your exact screening pathway will depend on your age, medical history, previous pregnancies, menstrual cycle and whether you are using your own eggs, donor eggs, donor sperm or a surrogate.
What are IVF screening tests?
IVF screening tests are investigations carried out before, or at the beginning of, fertility treatment. Their purpose is to assess ovarian function, look at the uterus and ovaries, identify health issues that may need attention, and meet the safety requirements of a licensed fertility clinic.
The word “screening” can sound alarming, but these appointments are usually about preparation. Results can help a consultant select an appropriate stimulation plan, decide whether further investigations are worthwhile and make sure treatment can proceed as safely as possible.
Some people complete the core tests quickly. Others may need follow-up blood work, imaging or specialist input before treatment begins. Neither route says anything about your chances as an individual – fertility is rarely explained by one number or one result.
Blood tests before IVF
Blood tests are a central part of IVF preparation because hormones, general health and infection status can all influence treatment planning. Timing matters for some hormone tests, so your clinic may ask you to attend on a particular day of your cycle.
Hormone and ovarian reserve testing
Anti-Müllerian hormone, usually called AMH, is commonly measured to estimate ovarian reserve. In simple terms, it gives an indication of how the ovaries may respond to stimulation medicines. A higher or lower AMH result does not measure egg quality, predict natural conception with certainty or define whether IVF will work. Age, ultrasound findings and your wider history remain very relevant.
Follicle-stimulating hormone (FSH), luteinising hormone (LH) and oestradiol may also be tested, often early in the menstrual cycle. These results can help build a fuller view of ovarian activity. Depending on your symptoms and history, your clinician may additionally check prolactin and thyroid function, as both can affect periods and fertility.
General health and infection screening
Before fertility treatment, clinics generally require infection screening for both partners where applicable. This commonly includes tests for HIV, hepatitis B and hepatitis C. These checks protect patients, babies, staff and stored eggs, sperm or embryos within the laboratory.
A full blood count may identify anaemia or other findings worth discussing with your GP or fertility specialist. Blood group and rhesus status may also be recorded. If you have a known health condition, such as diabetes, thyroid disease or an autoimmune condition, additional testing or a review of your medication may be advised before pregnancy treatment.
It can be frustrating if an unexpected result delays the next stage. However, dealing with a treatable issue first may give you a safer foundation for pregnancy and ensure your fertility team has the information they need.
Fertility ultrasound scans and why they matter
A transvaginal pelvic ultrasound is often one of the most informative parts of the assessment. It allows a qualified sonographer or clinician to examine the uterus, endometrium and ovaries in detail.
During the scan, they may assess the antral follicle count. These are small follicles visible in the ovaries at the start of a cycle, and the count is considered alongside AMH when estimating likely response to stimulation medication. The scan can also identify features that may require further discussion, including ovarian cysts, fibroids, polyps, signs of endometriosis or changes suggestive of polycystic ovary syndrome (PCOS).
Not every finding needs treatment before IVF. Small fibroids, for example, may have little effect depending on their size and position. A scan is valuable because it helps your fertility team consider the detail, not simply label a result as normal or abnormal.
At Miracle Scan, fertility and women’s health scans are carried out in a professional, supportive clinical setting. For many patients, having prompt, clear imaging before a fertility consultation can reduce uncertainty and help them feel more prepared for the conversation ahead.
Tests for sperm and male fertility
Where sperm will be used from a male partner, a semen analysis is usually requested. This assesses the volume of semen, sperm concentration, movement and shape. A single sample is a snapshot, and results can vary due to illness, timing, lifestyle factors and how the sample was collected.
If a result is outside the expected range, the fertility clinic may recommend repeating the test or arranging further assessment. Blood tests for hormones may be useful in some circumstances, while an ultrasound can be considered if there are symptoms, concerns about a varicocele or other clinical reasons.
Lower sperm numbers or movement do not automatically rule out treatment. IVF with intracytoplasmic sperm injection (ICSI) may be discussed for some couples, although the most suitable approach should be based on the full picture rather than semen results alone.
When are further investigations needed?
Your initial IVF screening may raise questions that benefit from more targeted testing. This does not necessarily mean something serious has been found. It may simply mean your team wants a more detailed view before recommending the right route forward.
A saline infusion scan, hysteroscopy or other uterine assessment may be considered if there is concern about the cavity of the womb, recurrent miscarriage, abnormal bleeding or previous unsuccessful embryo transfers. Tests to assess whether the fallopian tubes are open may be relevant if you are still considering natural conception or certain fertility treatments, but they are not always required for IVF itself.
Genetic testing may be offered when there is a personal or family history of an inherited condition, repeated pregnancy loss or particular chromosome-related concerns. Genetic carrier screening and pre-implantation genetic testing are different processes with different purposes. They should be discussed carefully with a fertility specialist or genetic counsellor, as they can provide useful information but cannot test for every possible condition or guarantee a healthy pregnancy.
How to prepare for your appointment
Your clinic will tell you whether a test needs to be booked for a certain day of your cycle, whether fasting is required and how to prepare for semen analysis. Bring details of any medication, supplements, previous test results, operations, pregnancies and relevant family history. Even information that feels unrelated, such as irregular bleeding, pelvic pain or changes in your periods, can help guide the assessment.
Try not to make sudden changes to prescribed medication without medical advice. If you are taking supplements marketed for fertility, mention them too. Some are harmless, but your clinician should know everything you are using when interpreting results and planning treatment.
It is also reasonable to ask what each test is for, when results will be available and what happens if a result is unexpected. A good consultation should leave space for those questions. IVF involves clinical decisions, but it is also your body, your time and your future family.
What results can – and cannot – tell you
The value of screening lies in combining results. AMH alone cannot predict pregnancy. A reassuring pelvic scan cannot confirm embryo quality. A normal semen analysis does not explain every case of infertility. Conversely, a result outside the usual range may still be compatible with successful treatment.
This is why experienced fertility care looks at patterns, priorities and options. Your age, duration of trying, previous treatment, symptoms, scan findings and personal preferences all shape the next recommendation. In some cases, the best next step is IVF. In others, it may be treatment for an underlying condition, a repeat test, lifestyle support, surgery, ovulation induction or simply more information.
The first round of testing is not a pass-or-fail moment. It is an opportunity to replace some of the uncertainty with clear questions, considered choices and a plan that feels right for you. Booking a professional fertility scan or blood test can be a calm, practical first step when you are ready to move forward.