That number dips significantly by puberty and continues to decline until menopause.
Figuring out how many eggs a female has is not an exact science.
Individual differences, certain health conditions, and lifestyle choices can impact both egg quantity and quality.
Illustration by Julie Bang for Verywell Health
Verywell Health respects that there are many ways a person may hold and express a sense of gender identity.
This anatomic definition may not align with their gender identity.
How Many Eggs Are Females Born With?
Unlike other types of cells, egg cells do not regenerate once they are gone.
Most medical experts agree that people are born with all their eggs and that no additional eggs will form.
How Many Eggs Do Females Have at Puberty?
Atresia continues to occur between birth and puberty.
You will lose around 11,000 eggs monthly during these years.
Your first menstrual period occurs as part of thepubertyprocess.
During puberty, your body starts to produce hormones that support egg maturation and ovulation.
How Many Eggs Do You Have in Your 20s?
How Many Eggs Remain in Your 30s?
By the time you reach 37, you’ll have around 27,000 eggs remaining in your ovarian reserve.
In addition to quantity, egg quality also starts to recede during the 30s.
How Many Eggs Are Left in Your 40s?
By age 40, the number of eggs you have is estimated to be around 5,000 to 10,000.
Between the ages of 43 and 44, the number of successful IVF cycles is 5%.
After 44, that number dips to 1%.
How Many Eggs Are Left in Your 50s?
Menopause is defined by going one year without menstruating.
In the United States, the average age of menopause is 51.
Pregnancy in women over 50 who used their own eggs is not unheard of.
However, it’s very rare.
How Many Eggs Does a Woman Produce Each Month?
Females are born with their entire egg supply.
No new eggs are produced monthly.
If you ovulate and menstruate regularly, you will typically release one mature, previously produced egg each month.
How Many Eggs Do You Lose Each Month?
During the ovulation process, one mature egg is released from a follicle and out of an ovary.
It then begins its journey down a fallopian tube for possible fertilization from sperm.
Occasionally, two (or more) eggs may mature and be released.
If more than one egg becomes fertilized, fraternal (nonidentical) twins or triplets may be conceived.
People with conditions such aspolycystic ovary syndrome (PCOS)may go many months without menstruating or ovulating.
Even during anovulatory months (months without ovulation), immature eggs are lost to atresia.
Is IVF or Egg Freezing Reducing My Egg Supply?
Rest assured, that’s not how these procedures work.
Only one egg reaches maturity during a typical, natural ovulation.
These eggs are the same ones that would have naturally died off that month.
They are not “future” eggs that would have matured later on.
The bottom line is that assisted reproductive technologies do not reduce your egg pool.
What Else Affects Egg Quantity?
There is no proven strategy for increasing an existing egg supply.
Hormonal forms of birth controlinclude oral pills, implanted intrauterine devices (IUDs), patches, and injections.
These forms of birth control work by stopping ovulation.
What Affects Egg Quality?
Egg quality decreases with age, just like egg quantity.
Eggs prepare to mature by undergoing a phase of cell division calledmeiosis.
The older your eggs get, the more likely they are to acquire DNA errors during this process.
These changes to DNA alter the number of chromosomes each egg contains, causing genetic abnormalities within the egg.
Abnormal eggs are referred to asaneuploid.
Aneuploidy affects 10% to 25% of eggs in people who are in their early 30s.
It affects over 50% of eggs in people over 40.
People with POI stop ovulating and menstruating regularly.
They may also have menopausal symptoms, like hot flashes and vaginal dryness.
POI is not menopause, however.
How Do I Know How Many Eggs I Have Left?
Your healthcare provider can help you estimate your ovarian reserve through testing.
These tests are usually reserved for people who are considering medical treatments for infertility.
Egg supply diminishes naturally with age.
People in their late teens through their early 20s have a high egg count with good egg quality.
Egg quantity and quality start to decline during the 30s, and continue to diminish until menopause occurs.
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Rogel Cancer Center University of Michigan Health.Normal ovarian function.
Yale Medicine.Women, how good are your eggs?
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The American College of Obstetricians and Gynecologists.Having a baby after age 35: How aging affects fertility and pregnancy.
American Society for Reproductive Medicine.Ovulation and the menstrual cycle.
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Sanchez AM, Vanni VS, Bartiromo L, et al.Is the oocyte quality affected by endometriosis?
A review of the literature.J Ovarian Res.
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USC FertilityFour ways to test your egg supply.
