Women's Fertility & Hormone Screening
Blood tests can provide useful information about ovarian reserve, ovulation-related hormones, thyroid function and other contributors to reproductive health — but no single blood test can determine whether a woman is “fertile” or predict exactly how long conception will take.
Two things are worth saying before any test is ordered. Age influences fertility more than any hormone result does. And roughly half of difficulty conceiving involves a male factor, so investigating only one partner leaves half the picture unexamined.
Fertility is more than a hormone panel
Age, ovulation, ovarian reserve, fallopian-tube factors, uterine conditions, endometriosis, sperm factors, medical history and timing all influence the chance of pregnancy. Blood tests are only one part of assessment.
A normal hormone result does not guarantee normal fertility, and an abnormal value does not automatically mean pregnancy is impossible.
The most consequential misunderstanding we see concerns AMH. It is frequently marketed as a fertility test and read as one, but it estimates how many eggs remain rather than whether they will produce a pregnancy. A reassuring AMH in a woman of 40 does not restore the fertility of 30, and a low AMH at 30 does not mean natural conception is unlikely. Treating it as a countdown clock causes both false reassurance and unnecessary alarm.
When is it reasonable to seek assessment?
| Your situation | Reasonable point to seek assessment |
|---|---|
| Under 35, regular cycles, trying to conceive | After about 12 months of regular unprotected intercourse. |
| Aged 35 or over | After about 6 months. Waiting the full year is where valuable time is commonly lost. |
| Aged 40 or over | Promptly, rather than waiting a defined interval. |
| Irregular or absent periods | Now, regardless of how long you have been trying — ovulation may not be occurring. |
| Known endometriosis, fibroids, pelvic surgery or infection | Early, since tubal and uterine factors need different assessment. |
| Two or more pregnancy losses | Assessment is appropriate rather than waiting for a third. |
| Male partner with known risk factors | Semen analysis early — it is quick, inexpensive and often skipped. |
| Simply planning ahead, not yet trying | Preconception review is reasonable; broad hormone panels usually are not. |
What common tests can — and cannot — tell you
AMH
Anti-Müllerian hormone can help estimate ovarian reserve and likely response to ovarian stimulation. It does not measure egg quality and should not be used alone to predict natural conception or guarantee future fertility.
FSH and estradiol
These may be useful in selected fertility or menstrual assessments, but interpretation can depend on cycle timing and the clinical context.
Progesterone
Progesterone may help assess whether ovulation has occurred when sampled at an appropriate time. A fixed calendar day is not correct for every menstrual cycle.
Thyroid function
Thyroid disorders can affect menstrual cycles, fertility and pregnancy health, but thyroid testing should be interpreted with symptoms, medication and pregnancy plans in mind.
Prolactin
Elevated prolactin can disrupt ovulation in some patients. Mild elevations may need repeat testing or investigation of medication, stress and other causes.
Metabolic markers
Glucose, lipids and other metabolic tests can be relevant when PCOS, insulin resistance or broader cardiometabolic risk is suspected, but they are not direct fertility tests.
What screening cannot do
- Guarantee future pregnancy.
- Measure egg quality directly.
- Exclude blocked fallopian tubes.
- Diagnose endometriosis from blood tests alone.
- Assess sperm factors.
- Replace pelvic examination or ultrasound when these are indicated.
- Diagnose ovarian or gynaecological cancer from a general hormone panel.
Tubal patency deserves specific mention because it is a common cause of difficulty conceiving and is entirely invisible on a hormone panel. Assessing it requires imaging such as a hysterosalpingogram or specialist ultrasound, which is a different test in a different setting.
Preconception care is the underrated part
For anyone planning pregnancy, several measures matter more than hormone testing and are frequently overlooked. Folic acid before conception rather than after a positive test, since neural tube development occurs very early. Rubella immunity checked in advance, because vaccination cannot be given during pregnancy. Review of any regular medication for pregnancy safety, and optimisation of thyroid disease, diabetes or hypertension before rather than during.
Reasons to consider assessment
Preconception planning, irregular periods, suspected PCOS or thyroid disease, difficulty conceiving, recurrent loss, or questions about fertility preservation are all reasonable reasons to seek review.
Antral follicle count by pelvic ultrasound can complement AMH when ovarian reserve or treatment planning is being evaluated. AMH and AFC are most useful interpreted together with age, menstrual history and the reason for testing.
On egg freezing
AMH may contribute to counselling, but decisions require specialist discussion of age, expected response, procedure risks, cost and realistic success rates — including how many eggs are typically needed for a reasonable chance of one live birth, which is more than most people assume.
Age at freezing matters more than age at use. That is the single most useful fact for anyone considering it, and it is worth getting specialist advice sooner rather than treating it as a decision to revisit later.
When symptoms need broader investigation
Heavy or abnormal bleeding, persistent pelvic pain, post-coital bleeding, a pelvic mass, unexplained weight loss, significant anaemia, or other concerning symptoms should be evaluated on their own merits rather than folded into a “fertility screening” package.
Pain deserves particular attention. Period pain severe enough to interfere with work or daily activities, or pain during intercourse, is not something to normalise — both can indicate endometriosis, which is commonly diagnosed years later than it could have been.
The Aquila pathway
1. Clinical history
Cycle pattern, pregnancies, contraception, symptoms, medication, family history and reproductive goals are reviewed — for both partners where relevant.
2. Targeted testing
Blood tests are selected for the clinical question rather than assuming every patient needs the same panel.
3. Interpretation and next step
Results are explained with their limitations, leading to reassurance, repeat testing, management, imaging, semen analysis, or referral to gynaecology or fertility services.
Frequently asked questions
Can AMH tell me if I can get pregnant naturally?
No. AMH is mainly a marker of ovarian reserve and does not by itself predict natural conception or egg quality.
Does a normal AMH mean I can delay pregnancy safely?
No. Reproductive age remains important, and a normal AMH should not be used as reassurance that egg quality or future pregnancy chances will remain unchanged.
Do all hormone tests need to be done on day 2 or 3?
No. Timing depends on the specific test and the clinical question. Some tests are cycle-dependent; others are not.
Can blood tests diagnose PCOS?
No single blood test diagnoses PCOS. Diagnosis uses clinical features and exclusion of other causes, with ultrasound used in some patients.
My AMH is low and I am in my early thirties — does that mean I cannot conceive?
No. AMH estimates egg quantity rather than quality or the ability to conceive naturally, and many women with low AMH conceive without difficulty. It warrants discussion, not despair.
When should we seek help if we are trying to conceive?
After about 12 months under 35, about 6 months at 35 or over, and promptly at 40 or over. Sooner if periods are irregular or there is known gynaecological history.
Should my partner be tested too?
Yes, and early. Around half of cases involve a male factor, and semen analysis is quick, inexpensive and frequently arranged far later than it should be.
When exactly should progesterone be taken?
About seven days before the next expected period, not automatically day 21. With a 35-day cycle that means around day 28, and mistiming can falsely suggest ovulation did not occur.
Will a hormone panel tell me if my tubes are blocked?
No. Tubal patency is invisible on blood tests and requires imaging such as a hysterosalpingogram or specialist ultrasound.
Is severe period pain normal?
Pain interfering with work or daily life, or pain during intercourse, should not be normalised. Both can indicate endometriosis, which is often diagnosed years later than it could be.
What should I do before trying to conceive?
Start folic acid before conception rather than after a positive test, check rubella immunity in advance, review regular medications for pregnancy safety, and optimise thyroid, diabetes or blood pressure control beforehand.
Does smoking affect fertility?
Yes, for both partners. It is associated with reduced fertility, earlier menopause and effects on sperm quality, and is among the few modifiable factors with meaningful effect.
How many eggs are needed if I freeze them?
More than most people expect for a reasonable chance of one live birth, and the number rises with age at freezing. A licensed centre can give figures specific to your age.
Does age at freezing or age at use matter more?
Age at freezing. That single fact is the most useful one for anyone considering it, and it argues for seeking advice sooner rather than later.
Can I have egg freezing in Singapore?
Access to elective egg freezing and assisted reproduction is governed by local rules that have changed in recent years. Confirm current eligibility with a licensed assisted reproduction centre.
Can stress cause infertility?
Stress is real and affects wellbeing, but framing it as the cause can delay proper investigation. It should not substitute for assessing ovulation, tubes, uterus and sperm.
Should I take supplements to improve egg quality?
Evidence for most is limited. Folic acid before conception is well supported; broader “fertility supplement” claims generally are not.
Is a big hormone panel a good idea if I have no symptoms?
Usually not. Untargeted panels generate borderline results that prompt further testing without changing management. Testing should answer a specific question.
Is fertility screening claimable under MediSave or insurance in Singapore?
Coverage varies by policy and whether testing is investigative or elective. Check directly with your insurer.
Where is Aquila Medical Center?
Aquila Medical Center is at 160 Robinson Road, #05-01 SBF Centre Medical Suites, Singapore 068914, in the CBD, a short walk from Tanjong Pagar, Shenton Way and Telok Ayer MRT stations.
Selected references
- Infertility. StatPearls, NCBI Bookshelf.
- Polycystic Ovarian Syndrome. StatPearls, NCBI Bookshelf.
- Anti-Mullerian Hormone. StatPearls, NCBI Bookshelf.
- World Health Organization. Infertility fact sheet.
- Singapore HealthHub. Preconception health.
This page is educational and does not replace individual medical assessment. No blood test determines fertility or guarantees future pregnancy, and AMH estimates ovarian reserve rather than egg quality or the ability to conceive. Assessment of a couple should include both partners. Access to assisted reproduction in Singapore is subject to local regulations that may change. Content reviewed by the medical team at Aquila Medical Center, Singapore. Last reviewed: 26 August 2026.
Use testing to answer a clinical question
A doctor-led review can help decide which fertility or hormone tests are useful and when specialist reproductive assessment should not be delayed.
If the more useful step is a semen analysis, a pelvic ultrasound or an earlier specialist referral, we will say so rather than run a larger panel.