How Many Eggs Should I Freeze? Understanding the Right Number for You

One of the most common questions patients have when considering egg freezing is: How many eggs should I freeze to maximise my chances of future pregnancy? The answer depends on factors like age, fertility potential, and family planning goals.

General Guidelines for Egg Freezing

Fertility specialists generally recommend freezing 13 – 18 mature eggs to provide an estimated 60-70% chance of having a baby. However, this number may vary based on individual circumstances. Women with a lower ovarian reserve or those planning for multiple children may need to freeze more eggs.

Key Factors Affecting the Number of Eggs to Freeze

• Age of the Patient: Younger women typically produce healthier eggs, meaning they may require fewer eggs for a successful pregnancy. Women in their late 30s or 40s may need to freeze more eggs to account for the natural decline in egg quality.
• Family Planning Goals: The larger the intended family size, the more eggs should be stored. If a woman wants more than one child in the future, additional egg retrieval cycles may be necessary.
• Timeframe for Pregnancy: Women who plan to conceive at an older age, such as 39 or 40, may require a higher number of eggs compared to someone aiming for pregnancy in their mid-30s.

How Many Egg Freezing Cycles Are Needed?

For most women with a healthy ovarian reserve, collecting 13-18 mature eggs can be achieved in a single egg retrieval cycle. However, if ovarian function is reduced or if a woman desires more than one child, multiple cycles may be needed. 

Factors Affecting Egg Freezing Success

Not every egg collected will successfully survive the freezing and thawing process. Several key factors influence success rates:

• Egg Quality: Only mature eggs of good quality are selected for freezing. Poor-quality eggs may not fertilise and thaw successfully.
• Survival Rate: Not all eggs survive the freezing and thawing process. Typically, around 90% of eggs remain viable after thawing.
• Fertilisation Rates: Even after thawing, not every egg will fertilise successfully. Eggs that do not fertilise or have abnormal fertilisation will be discarded

What Happens After Egg Freezing?

When a woman is ready to use her frozen eggs, they are thawed and fertilised with sperm. The resulting embryos are monitored for quality before undergoing embryo transfer. The success of pregnancy depends on embryo quality, uterine health, and overall fertility status.

Meet Our Fertility Specialists

Dr Chua Ka-Hee

Consultant Obstetrician & Gynaecologist, Fertility Specialist

MBBS (Singapore), MRCOG (UK)