Infertility & Age

Every woman deserves the facts about her biological clock. This website is intended to provide you with the necessary information that allows you to make informed decisions. That is why we called our clinic Informed Egg Freezing.

Monthly Chance of Pregnancy

Our chance of conceiving every month is not 100%. It is a common misconception that we have a 100% chance of pregnancy each time we ovulate (e.g: each month).

Women in their 20s enjoy the highest fertility rates, with “24” typically being quoted as the peak fertility age.

Women in their 20s have an egg pool that is abundant, and most of their eggs do not have chromosomal abnormalities – both of which guarantee a heightened likelihood of conception. However, they too still carry a certain percentage of our eggs that are abnormal, and given that fertilisation has to happen within a narrow window after ovulation occurs, even a young and healthy woman trying to get pregnant only have about a 25% chance each month.

The Age Factor

Signs of Infertility

Given there are 12 cycles in a year, it is easy to calculate your probability of getting pregnant over a 12-month period given your age.

Couples that have been trying to fall pregnant at the relevant time of the cycle and have not had success should contact a fertility specialist for a thorough investigation after the following timeframes:

  • Female Age over 35 years old: 6-months of regular unprotected sex
  • Female Age under 35 years old: 12-months of regular unprotected sex

It is about as common for the male partner to be the source of infertility as the female, so both partners should be investigated at this point.

Chance of Miscarriage

About half of all miscarriages happen because the chromosomes in the embryo are abnormal and the pregnancy does not develop properly from the start. A miscarriage is nature’s way of dealing with an abnormal embryo.

Nothing can be done to prevent a miscarriage from occurring if a pregnancy is developing abnormally.

The risk of miscarriage rises as a woman ages, with a dramatic rise starting after age 35, simply because chromosomal abnormalities in the remaining eggs are more common with time (and thus, age).

You can reduce your chance of miscarriage by:

  • Not smoking
  • Modify / reduce your caffeine intake
  • Avoid alcohol
  • Where possible, avoid contact with others who have a serious infectious illness

Menopause & Leaving It Too Late

Menopause is technically the final age at which your fertile clock stops ticking – you have almost no chance of conceiving naturally, because you have no eggs left to fertilise. In Australia, the average age for menopause is around 51.

While you still have a chance of getting pregnant until you reach menopause, it is important to note that women actually start to lose their fertility 4-to-8 years before menopause – a period known as perimenopause.

During perimenopause, you could still have eggs, but the majority of them are likely to be abnormal. Plus, you are more likely to be ovulating irregularly – both of which significantly reduce your chances of conceiving a healthy baby.


Age-related fertility decline is an inevitable part of being a woman. Your ability to have children depends on whether your ovaries have enough good eggs that can progress into a healthy pregnancy.

Eggs, like other cells within the body, degrade over time, causing a decline in fertility rates by age. Unfortunately, no one is able to stop time, so you might consider freezing your eggs as a way to slow down your fertility clock, or at least stop your eggs from ageing further.

Take the First Step

Book an appointment today.

Get in touch with our friendly team to arrange an appointment with one of our fertility specialists.