Age and female fertility

Overview of the relationship between age and female fertility

Age and female fertility refers to the relationship between a woman's age and her ability to conceive and bear children. Fertility in women is known to decline with age, and this decline becomes more pronounced after the age of 35.

Overview

Female fertility is closely linked to age. Women are born with a finite number of ovarian follicles, which are the structures in the ovaries that contain immature oocytes or egg cells. As a woman ages, the number and quality of these follicles decrease, leading to reduced fertility.

Biological factors

The decline in female fertility with age is primarily due to the decrease in both the quantity and quality of oocytes. Women are born with approximately 1 to 2 million oocytes, but this number decreases significantly over time. By puberty, only about 300,000 to 400,000 oocytes remain, and this number continues to decline with age.

Ovarian reserve

The term ovarian reserve refers to the number of viable oocytes remaining in the ovaries. As women age, their ovarian reserve diminishes, which is a key factor in the decline of fertility. The rate of decline varies among individuals, but it accelerates after the age of 35.

Oocyte quality

In addition to the decrease in quantity, the quality of oocytes also declines with age. Older oocytes are more likely to have chromosomal abnormalities, which can lead to miscarriage or congenital disorders such as Down syndrome.

Age-related fertility decline

The decline in fertility with age is a well-documented phenomenon. Women in their 20s and early 30s generally have the highest fertility rates. However, fertility begins to decline in the early 30s and drops more sharply after age 35. By age 40, the chance of natural conception per month is significantly reduced.

Assisted reproductive technologies

For women experiencing age-related fertility decline, assisted reproductive technologies (ART) such as in vitro fertilization (IVF) can offer potential solutions. However, the success rates of ART also decrease with age, particularly after age 40.

Social and cultural factors

In recent decades, many women have chosen to delay childbearing for various reasons, including career advancement and personal choice. This trend has led to increased awareness of age-related fertility decline and the potential need for fertility preservation methods such as egg freezing.

Related pages

• Fertility
• Ovarian reserve
• In vitro fertilization
• Egg freezing

Gallery

• 
  Graph showing the decline in female fertility with age.
• 
  Image of non-growing follicles in the ovary.

• 
  Age and female fertility
• 
  Non-Growing Follicles