Many ask "how many eggs does a woman have?" when considering pregnancy, trying to conceive, or simply wanting to understand their bodies better. The short and verifiable answer is that women are born with a large number of immature eggs (oocytes), and this number continuously decreases throughout life. Here you will find a practical and down-to-earth overview of what is known, how you can use this knowledge in everyday life, and when it makes sense to take the next step.
How many eggs is a woman born with?
Research shows that a fetus with female gonads has the most egg precursors in the middle of fetal life, and the number decreases towards birth. At birth, the number is typically in the order of 1 to 2 million immature eggs. It is important to know that this does not mean "1 to 2 million chances" for pregnancy, because the vast majority of eggs are naturally lost over time through a biological process (atresia).
The practical takeaway: The body works with an "ovarian reserve" that gradually decreases and varies from person to person.
How many eggs does a woman have in puberty and as an adult?
By puberty, the ovarian reserve has typically dropped to about 300,000 to 500,000 immature eggs. From here, the decline continues year by year. In the fertile part of life, a group of follicles matures in each cycle, but usually only one egg is released during ovulation.
What you can use this for: If you have an irregular cycle, very short cycles, or prolonged absence of menstruation, it may be relevant to talk to a doctor, because cycle patterns can give hints about how ovulation works (without saying anything definitive about the ovarian reserve alone).
How many eggs does a woman use during her lifetime?
Although one starts with hundreds of thousands of immature eggs at puberty, most women only ovulate about 300 to 400 times in their entire life (the number varies, partly depending on pregnancies, breastfeeding, and the use of hormonal contraception). The rest of the eggs gradually "disappear" as part of the natural decline in ovarian reserve.
Practical guide for those trying to time ovulation
If you are trying to conceive, you can make it more concrete by:
- tracking cycle length for 2 to 3 months
- using ovulation tests, if that suits you
- prioritizing intercourse in the days leading up to expected ovulation (sperm can survive for several days, while the egg's window is shorter)
Ovarian reserve and age: what does it mean for fertility?
It is well-documented that fertility on average decreases with age, partly because both the number and quality of eggs change. But this does not say anything precise about the individual. Some have a higher ovarian reserve than expected for their age, others lower.
If you want a more concrete picture, there are tests that the doctor can use in an overall assessment, typically:
- AMH (anti-Müllerian hormone) in the blood
- ultrasound with antral follicle count (AFC)
They cannot guarantee pregnancy, but can help with planning and next steps.
When should you seek help if you are concerned about eggs?
If you are concerned about ovarian reserve or are not getting pregnant as expected, a realistic next step is to talk to your GP. As a practical rule of thumb (used in many healthcare settings), investigations are often initiated after 12 months of trying, or earlier if you are older, have a very irregular cycle, previous pelvic surgery, endometriosis, or other known factors.
If you already have a positive test or are preparing your body for pregnancy, it may make sense to look at comfort and support for the coming period. You can find relevant solutions in the Pregnancy collection, and if you need a seamless bra solution without metal underwire, a nursing bra with gel support could be an alternative, such as the Gel-Support maternity nursing bra.