How Many Eggs Does a Woman Have? Ovarian Reserve and Age

• A female fetus has the most eggs she will ever have (around 6 to 7 million) at about 20 weeks of pregnancy; the count then only falls.
• You are born with roughly 1 to 2 million eggs, have about 300,000 to 500,000 at puberty, and only 300 to 400 will ever ovulate in your lifetime.
• Most eggs are lost through a natural process called atresia, not through ovulation, and contraception, pregnancy, and breastfeeding do not preserve them.
• After about age 35, both egg quantity and quality decline faster, but the '35 cliff' is a gradual slope, not a sudden drop-off.
• AMH and antral follicle count estimate how many eggs remain, but neither measures egg quality, which matters most for a healthy pregnancy.

Egg development begins remarkably early, long before a baby girl is born. The primordial germ cells that become eggs first appear around 4 to 5 weeks after conception, then migrate to the developing ovaries by 6 to 8 weeks, where they multiply rapidly.

At around 20 weeks of fetal development, a female fetus reaches the maximum egg count she will ever have: roughly 6 to 7 million eggs. This is the lifetime peak. From here, the number only declines.

By birth, a natural loss process called atresia has already reduced the count to about 1 to 2 million eggs. These eggs are frozen mid-division at a stage called prophase I, where they may wait years or decades before being recruited for What Ovulation Actually Means.

By the time periods begin (menarche), typically between ages 9 and 16 in Indian girls, the reserve has dropped to roughly 300,000 to 500,000 eggs. That is still a large pool, but a fraction of the starting amount. Across an entire reproductive life, only about 300 to 400 eggs will actually ovulate. The rest are lost to atresia.

This is the key difference from male biology: women do not make new eggs. The pool you are born with is all you will ever have.

• At birth: about 1 to 2 million eggs.
• At puberty (age 9 to 16): about 300,000 to 500,000 eggs.
• Age 20 to 25: about 200,000 eggs, with the highest natural pregnancy rates per cycle (around 25 to 30 percent for healthy couples).
• Age 30: about 100,000 to 150,000 eggs; fertility still high but starting to gently decline.
• Age 35: about 50,000 to 100,000 eggs; fertility decline becomes more noticeable.
• Age 37 to 38: about 25,000 eggs; the rate of decline often accelerates here.
• Age 40: about 10,000 to 20,000 eggs; natural fertility falls more steeply and miscarriage risk rises.
• Age 45: about 5,000 to 10,000 eggs, often of reduced quality; natural pregnancy becomes rare.
• Menopause (average around 47 to 50 in Indian women): the reserve falls below roughly 1,000 viable eggs and ovulation stops.

Quantity is how many eggs remain (your ovarian reserve). Quality is the genetic and structural health of those eggs, which decides whether they can fertilise, develop normally, and lead to a healthy baby. Both fall with age, but at different speeds.

Quantity declines steadily through atresia. Quality declines more sharply after 35, with a steeper drop after 38 to 40, because eggs that have sat in prophase I for decades accumulate genetic damage. For age-related fertility decline, quality is usually the bigger factor; this is why IVF success rates fall with age even when several eggs can be retrieved.

The most common problem in older eggs is aneuploidy, an incorrect number of chromosomes. Aneuploidy can cause failed fertilisation, failed embryo development, Miscarriage: Types, Recovery and Care in India, or chromosomal conditions such as Down syndrome. The rate rises from roughly 10 to 25 percent in the early thirties to over 50 percent by the early forties.

Importantly, AMH and antral follicle count measure quantity, not quality. A woman can have good AMH at 40 yet still have age-40 eggs. There is no reliable direct test for egg quality; it is inferred from age and treatment outcomes. Some clinics use CoQ10, antioxidants, omega-3s, good sleep, and stress management to support egg health, especially for women over 35, but be cautious of any clinic promising to 'rejuvenate' eggs without strong evidence.

This is also why younger ages are best for egg freezing: eggs frozen at 28 keep their age-28 quality when used later.

Anti-Mullerian Hormone (AMH) is made by small follicles in the ovaries, and the blood level gives a rough estimate of remaining reserve. A convenient feature is that AMH can be tested on any day of your cycle. For a fuller explanation of timing and interpretation, see our dedicated guide to AMH and ovarian reserve testing.

In India, AMH testing typically costs Rs 1,200 to Rs 2,500 depending on the lab (Thyrocare, Dr Lal PathLabs, Metropolis, SRL), with home collection adding Rs 200 to Rs 500.

Results must be read in the context of your age. Rough guideposts often used are: above 2.5 ng/mL at 25, around 1.5 to 3 ng/mL at 30, around 0.7 to 2 ng/mL at 35, around 0.3 to 1 ng/mL at 40, and often below 0.3 ng/mL by 45. These are not strict pass-fail cutoffs.

Very high AMH (often above 4 to 5 ng/mL) can point to PCOS, where many small follicles raise AMH even though ovulation may be irregular; high AMH here does not mean better fertility. Very low AMH suggests reduced reserve and may prompt earlier action, but it does not mean you cannot conceive.

AMH is most useful when it will inform a real decision (family planning after 30, before IVF, before chemotherapy or ovarian surgery, or when premature ovarian insufficiency is suspected). Testing casually, without a plan, can cause distress that may not be warranted. Ideally a fertility specialist interprets the result alongside your history.

Egg freezing (oocyte cryopreservation) preserves eggs at their current age and quality for future use, letting you delay childbearing without losing the option of biological children, within limits. The process involves 10 to 14 days of hormone injections, monitoring scans and blood tests, egg retrieval under anaesthesia, and freezing by vitrification, a rapid technique that has greatly improved survival rates.

Age at freezing is the single most important predictor of future success. Eggs frozen in the late twenties have the best prognosis; success drops substantially after 38. Most clinics aim to bank at least 15 to 20 eggs, which may take 1 to 3 cycles. Our guide to egg freezing cost, process, and honest success rates covers this in depth.

Egg freezing in India typically costs Rs 1,50,000 to Rs 4,00,000 per cycle, with storage around Rs 15,000 to Rs 30,000 per year. Using frozen eggs later requires IVF: thawing, fertilisation, and embryo transfer. Live birth rates per frozen egg are roughly 5 to 10 percent at age 30 and fall with age at freezing. Freezing preserves an option; it is not a guarantee of a future baby.

Counselling beforehand, with realistic expectations about success, time, and cost, is an important part of good care.

• Smoking is the clearest accelerator; quitting at any age slows further decline, and passive smoking counts too.
• Body weight matters in both directions: BMI under 18.5 and over 30 are both linked to reduced fertility, with a fertility sweet spot around BMI 20 to 25.
• Diet quality, rich in vegetables, fruit, whole grains, healthy fats, and lean protein, supports egg health; Indian whole-food diets do this well.
• Vitamin D deficiency is very common in Indian women and is linked to fertility issues; correcting a documented vitamin D deficiency may help.
• Sleep of 7 to 9 hours and managing chronic stress support reproductive hormones.
• Caffeine under 200 mg a day (about 2 cups of coffee) and alcohol in moderation have minimal effect; heavy use does not.
• Reducing exposure to endocrine-disrupting chemicals (steel bottles instead of plastic, washed produce, fragrance-free care) is sensible where practical.
• Supplements such as CoQ10, and DHEA or inositol in specific cases, should be discussed with a fertility specialist rather than self-stacked.

India's fertility scene blends fast-improving medical capability with persistent social pressure about when to have children. The average age at marriage for urban Indian women has risen to around 22 to 25, with first pregnancy often delayed by career, finances, and personal choice, which means more women face fertility decisions in their thirties, when reserve has begun to fall.

Family expectations to marry and have children by the mid-twenties often clash with biology. Knowing your own reserve helps you advocate for a realistic timeline with data rather than assumptions.

Access has expanded greatly, with national clinic chains now in most metros and ISAR-affiliated specialists increasingly in tier-2 cities. Cost remains the main barrier: an IVF cycle commonly runs Rs 1,50,000 to Rs 3,50,000, often over 2 to 3 attempts, and insurance coverage in India is still limited, though some private riders and corporate plans now include fertility benefits.

Surrogacy is permitted only on an altruistic basis under the Surrogacy (Regulation) Act 2021, with strict eligibility, and commercial surrogacy is banned. If a partner's results are part of the picture, it helps to separate fact from fiction; our piece on male fertility myths versus reality is a good companion read. Emotional support, through counselling, peer communities, and apps like SHELY, is increasingly part of fertility care.

• You are under 35 and have been trying to conceive for 12 months without success, or 6 months if you are 35 to 40.
• You are over 40 and want to conceive; seek evaluation before a long trying window.
• Your periods stop, become very irregular, or you have hot flashes or night sweats before age 40, which can suggest premature ovarian insufficiency.
• You have a family history of early menopause, an autoimmune condition, or are facing chemotherapy, radiation, or ovarian surgery.
• Your AMH or AFC result is unexpectedly low, or you simply want help interpreting a reserve test in the context of your goals.

• American College of Obstetricians and Gynecologists (ACOG): Having a Baby After Age 35
• American Society for Reproductive Medicine (ASRM): Age and Fertility
• NHS: Infertility
• World Health Organization (WHO): Infertility
• Surrogacy (Regulation) Act 2021, Government of India