For example, a woman at 30 often has around 100,000-150,000 eggs in reserve. By 35, that number is likely around 80,000. Late into the thirties, that number could be 25,000, 10,000, or fewer.
Women lose 90 per cent of the eggs in their ovaries before the age of 30, new research has shown. The mathematical model shows that the average woman has only 12 per cent of her eggs left by the age of 30 and only three per cent by the age of 40.
ACOG states that a female's fertility gradually and significantly drops around age 32. They will have around 120,000 eggs, with a 20% chance of conceiving per cycle. ACOG further states that a female will experience a rapid decline by age 37, when egg count drops to around 25,000.
Each month that she tries, a healthy, fertile 30-year-old woman has a 20% chance of getting pregnant. That means that for every 100 fertile 30-year-old women trying to get pregnant in 1 cycle, 20 will be successful and the other 80 will have to try again.
While 30s is a good time to conceive, there might be many chances of chromosomal abnormalities or other abnormalities in the egg due to an increase in age. These abnormalities can lead to failure in implantation, miscarriage, or an unhealthy baby.
By puberty, a woman's egg count might be 1 million; at 25, maybe 300,000. Then, around 35, the decline starts to get a bit steeper until all eggs have been depleted (menopause).
At the age of 37, the average woman has around 25,000 eggs left, and by the time she reaches 51, this will have fallen to 1,000. “Just before menopause, your egg supply reaches below 1,000, and ovulations space out before they stop altogether, eventually,” says Dr. Sekhon.
A woman's peak reproductive years are between the late teens and late 20s. By age 30, fertility (the ability to get pregnant) starts to decline. This decline happens faster once you reach your mid-30s. By 45, fertility has declined so much that getting pregnant naturally is unlikely.
But the most important factor affecting fertility in women over age 35 is a decrease in egg quality. This decrease in quality impairs fertilization and embryo development, and reduces the chances of achieving a healthy pregnancy.
The AMH Test
The level of AMH in a woman's blood helps doctors estimate the number of follicles in her ovaries; the more follicles a woman has, the more eggs she can release, and the better her chances of pregnancy.
A woman is born with all her eggs. Once she starts her periods, 1 egg develops and is released during each menstrual cycle.
Fertility starts to decline from the age of thirty and is greatly reduced after forty years of age. Therefore it the optimum age to freeze your eggs in your late twenties. However, freezing eggs at thirty to thirty five is also quite common.
For anyone who is looking to become pregnant after 30 or 35, experts suggest planning the first pregnancy before 37 years old. This increases the chances of having at least one child before fertility declines further. Some people who are around or over the age of 35 freeze their eggs to use later.
One study found that for couples having regular unprotected sex: around 7 out of 10 women aged 30 will conceive within one year. around 6 out of 10 women aged 35 will conceive within one year. around 4 out of 10 women aged 40 will conceive within one year.
Women who become pregnant in their 30s and early 40s can have safe, healthy pregnancies, says Ellie Ragsdale, MD, director of fetal intervention at UH Cleveland Medical Center. But they do face a higher risk of some problems.
How many eggs do women have in their 30s? There is no one right answer to this question, as certain factors – such as smoking or other personal factors – may mean a woman has fewer eggs than others. The average number of oocytes at the age of 30 would be around 72,000 (12% of maximum pre-birth levels).
Fertility starts to decline during the early 30s, says Klipstein. The rate of egg loss increases when you hit age 35. By age 40, the chance of getting pregnant is less than 5% per menstrual cycle. Very few or practically no eggs remain by the time you reach ages 45 to 55, or menopause.
If you are thinking about having a baby in your late thirties or early forties, you are not alone. Women ages 35-45 are increasingly becoming first-time moms. And most healthy women in this age group have healthy pregnancies, births and babies.