Fertility Preservation

Fertility preservation at a glance

  • Fertility preservation is the act of saving patients’ ability to have children at a later point in life by freezing the woman’s eggs, the man’s sperm or embryos created through in vitro fertilization (IVF).
  • Fertility preservation may be pursued for social reasons, such as wanting to focus on career before having children, or for medical reasons, such as preserving eggs or sperm before undergoing sterilizing cancer treatments or sex reassignment surgery.
  • Due to the deterioration of a woman’s egg quality as she ages, female patients are more apt to utilize fertility preservation for social reasons when they are young and have robust eggs that can increase the chance of pregnancy at an advanced age.
  • Methods for preserving fertility generally involve cryopreservation, which is the freezing and storing of eggs, sperm and embryos.

Fertility preservation guide

What is fertility preservation?
Preservation options for women
Sperm freezing for men
Preserving fertility before cancer treatment
Transgender fertility preservation

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What is fertility preservation?

Fertility preservation is a process by which a man or woman saves their ability to have children until a later point in life when it may be more desirable or is medically necessary due to pending treatments that can result in sterility.

A common method of fertility preservation is egg freezing, in which a woman’s eggs are extracted, frozen and stored for future use months or even years later when she is ready to get pregnant. This may be done for social reasons (i.e. she has not found a partner with whom she would like to have children) or for medical reasons such as preserving fertility before cancer treatment or sex reassignment surgery.

Similarly, men may opt to freeze their sperm for future use. This procedure is not as common as egg freezing since men are not affected by age-related infertility to the same degree as women, who experience a decline in egg quality beginning in their 30s. Rather, men freezing their sperm often do so prior to cancer treatment or another serious medical procedure such as sex reassignment surgery that threatens to leave them infertile.

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Preservation options for women

Egg freezing

Egg freezing is a procedure in which a woman’s eggs (oocytes) are collected, frozen and stored for future use. Essentially, the patient undergoes the beginning stages of IVF. She is first given drugs to stimulate her ovaries so they produce multiple eggs. Once the eggs are nearing maturity, a special injection called a trigger shot is administered, which causes the eggs to undergo the final stages of development. The eggs are retrieved in an outpatient procedure that uses a vaginally inserted ultrasound probe and are then frozen.

The technology to retrieve and cryopreserve a woman’s eggs has improved dramatically in recent years. One important development is called vitrification, a rapid process that brings the egg to subzero temperatures without allowing ice crystals to form. Because human egg cells contain a high amount of water, this is critically important. The absence of ice crystals leads to higher egg survival rates than with traditional freezing methods.

The ideal egg freezing patient is under the age of 40. The younger a woman is when her eggs are frozen, the better the odds that her eggs will survive the freezing and thawing process.

Embryo freezing

Women may elect to freeze fertilized eggs, called embryos, using sperm from a partner or from a sperm donor. Embryos are frozen using vitrificaiton, the same method described above for egg freezing. These embryos may be created for the sole purpose of freezing and preserving them for use at a later date, or they may remain from an IVF cycle in which more embryos were created than transferred for pregnancy.

In the latter case, embryo freezing can be useful for women whose first IVF embryo transfer fails to result in pregnancy. If she has remaining frozen embryos, she can try again without having to undergo the cost and discomfort of a second ovarian stimulation and egg retrieval. Couples may also wish to freeze and store embryos after a successful round of IVF treatment in hopes of having more children at a later date.

Sperm freezing for men

A man may elect to freeze his sperm before undergoing a procedure that will leave him infertile, such as chemotherapy or vasectomy. Men working in high-risk conditions or on extended leave from home, such as those deployed in the military, may also wish to freeze their sperm. The frozen sperm can be thawed later and used for intrauterine insemination (IUI) or IVF.

In most cases, sperm from semen is collected through masturbation. The semen is analyzed in the lab for sperm quality, and the sperm are then extracted and frozen. If quality sperm cannot be extracted from the semen or the patient is unable to ejaculate, it may be collected from one of his testicles via surgical procedure.

Preserving fertility before cancer treatment

Treatments for cancer such as chemotherapy, radiation and surgery can have devastating effects on fertility in both men and women. Chemotherapy and radiation are toxic, which is what allows them to kill cancer cells. But their toxicity may damage sperm and eggs, affect reproductive hormones and organs, and induce early menopause. In addition, surgeries affecting the reproductive system, such as the removal of the ovaries or testicles, can leave patients infertile.

Patients who’ve been diagnosed with cancer should talk to their oncologist about the reproductive impact that their treatment will have. If fertility preservation is advised, it is usually best to undergo it quickly so that cancer treatment can be started as soon as possible.

Oncofertility explained

Discounted preservation options through Livestrong Fertility

Reproductive Science Center of the Bay Area partners with the LIVESTRONG Foundation to provide fertility preservation options for cancer patients whose treatment may jeopardize their future fertility or has already impacted their fertility. Livestrong Fertility provides reproductive information, resources and financial support to survivors, offering discounted services for qualifying patients. Here are a few things to note before you apply:

  • Please confirm Reproductive Science Center offers the service you are interested in pursuing.
  • All patients will be required to complete an eligibility screening before gaining access to the online application.
  • For additional criteria on who is eligible to apply, visit Livestrong Fertility to learn more.

Transgender fertility preservation

Transgender transitioning may involve altering one’s physical sex using reproductive hormones, and may also involve sex reassignment surgery. Both will have a marked effect on fertility, and sex reassignment surgery will usually make future reproduction impossible.

Transgender men may elect to freeze their eggs before transitioning. Similarly, transgender women may wish to freeze their sperm before hormone therapy or reassignment surgery. This preservation allows transgender men and women to fully transition while keeping their reproductive options intact.

Blogs about fertility preservation

Fertility Counseling For Cancer Patients – Mary Hinckley, MD
Egg Vitrification – Mary Hinckley, MD
Fertility For Children Exposed To Chemotherapy – Mary Hinckley, MD
How to Prevent Chemo-Induced Ovarian Failure – Mary Hinckley, MD