Donor Eggs
When Are Donor Eggs Recommended?
Evaluation of the Recipient Couple
Donor Recruitment
Screening Egg Donors
Known Donors
Donor Preparation for Egg Retrieval
Pregnancy Rate
Cost
Donor Sperm
When Is Donor Insemination Needed?
The Evaluation
The Insemination Procedure
The Use of Frozen Semen
Screening Anonymous Donors
Success Rate
Donor Embryos
Surrogacy
Evaluation
Surrogate Sources
Screening Surrogates
Psychological Issues
Donor eggs offer the possibility of childbearing to woman whose ovaries are absent, or whose ovaries do not reliably produce eggs that can be fertilized. The first pregnancy achieved with the use of donor eggs was reported in 1984. By using in vitro fertilization (IVF) techniques, eggs are obtained from the ovaries of another woman (donor), fertilized by sperm from the recipient's partner, and the resulting embryo's are placed into the recipient's uterus. If pregnancy is achieved, the resulting child will be genetically related to the recipient's partner but not to the recipient. Generally, there is no need for an amended birth certificate as there is with adoption.
When Are Donor Eggs Recommended?
Donor eggs may be recommended to woman who have a uterus but whose ovaries do not produce usable eggs, due to premature ovarian failure for example. Woman who have had their ovaries removed as treatment for cancer, endometriosis, or pelvic infection; or whose ovaries were damaged by chemotherapy or radiation therapy for cancer; or who were born without functioning ovaries; or who have poorly functioning ovaries may be candidates for donor eggs.
Ovarian function can be assessed by measuring the follicle stimulating hormone (FSH) level on the third day of the menstrual cycle. FSH is elevated in woman who have experienced premature ovarian failure, natural menopause, or whose ovaries have been removed, and is also frequently elevated when ovarian function and egg quality are declining. An elevated FSH level may indicate that a woman is a candidate for donor eggs. Donor eggs may also be recommended to a woman who has a serious genetic disease that she may pass on to a child if her own eggs are used.
Evaluation of the Recipient Couple
Prior to considering the use of donor eggs, the physician will take a detailed medical history from both partners of the recipient couple. The male will need a semen analysis. In addition to a thorough physical exam, the female will usually have an assessment of ovarian function if she is not menopausal or has not had her ovaries removed. If she has spontaneous menstrual periods, special medications may be needed to suppress her ovarian function (see Preparation of Female Recipient below).
Laboratory tests for human immunodeficiency virus (HIV), hepatitis B and C, and other sexually transmitted diseases (STDs) are recommended for both female and male (recipient couple). If the female is over 40 years of age, the physician may recommend a thorough evaluation including cardiovascular screening and high-risk obstetrical consultation before proceeding. Evaluation of the recipient female's uterus may involve a hysteroscopy or a hysterosalpingogram (HSG).
Donor Recruitment
There are three ways of obtaining donated eggs:
- Known Donor
The recipient may know the egg donor. She may be a close relative or friend who is willing to donate her eggs. - Anonymous Donor
The recipient may not know the egg donor, and the donor's identity may remain unknown. This option is usually arranged through established egg donation programs. - IVF Programs
Woman in IVF programs may agree to donate their excess eggs to other infertile patients.
Screening Egg Donors
All egg donors, both known and anonymous, should be screened according to the standards recommended by the American Society for Reproductive Medicine. The donor should be younger than 34 years of age (except in special circumstances) and preferably with proven fertility. This is because younger woman respond move favorably to the hormone medications used during the procedure and their eggs result in higher pregnancy rates. Natural pregnancies in woman over the age of 34 carry an increased risk of the child having a chromosomal abnormality such as Down Syndrome. Therefore, if the donor is over 34 years old, prenatal diagnosis may be suggested to the recipient couple if pregnancy is established.The donor must be screened for genetic diseases, hepatitis B and C, HIV, syphilis, and Rh incompatibility. Some form of psychological evaluation is also recommended.
One concern with the use of donor eggs is the risk of HIV transmission. The available testing is very accurate but it may not pick up a recently acquired infection (less than six months). The risk of this occurring is extremely low, and the current practice is to use fresh eggs. Eggs unfortunately cannot be frozen because the freezing process damages them. People concerned about HIV risk can consider having the donated eggs fertilized with sperm and the resulting embryos frozen for future use. After six months this donor can be re-tested and if she is still negative for HIV, the embryos can be thawed and transferred to the recipient's uterus. The drawback of this approach is that pregnancy rates with frozen embryos are lower than pregnancy rates with fresh eggs or fresh embryos.
Donor egg programs vary in their philosophy regarding how much information is provided about the donor. Some programs have an "open" program where the recipient couple and the donor may have contact. Most programs are "closed" and only anonymous written information about the egg donor is available to the recipient.
Known Donors
Known egg donors should undergo the same screening process as anonymous donors. Screening of the donor's partner for HIV may also be recommended. There are drawbacks to using a known donor.It is important to make sure that the donor and her partner if applicable, are completely comfortable with the situation prior to proceeding. Over time the recipient's relationship with the donor as well as the donor's comfort with her decision may change. This could create social and legal problems. Furthermore, it may be more difficult to keep the donation private if the recipient wants to do so but the donor does not. Legal and psychological counseling can be very helpful in considering and discussing the life-long implications of using a known donor.
Donor Preparation for Egg Retrieval
A woman's ovaries usually release only one egg per cycle in a process known as ovulation. In order to retrieve multiple eggs from the donor's ovaries, the donor will be given hormonal medications to induce her ovaries to produce several mature eggs. This technique is known as controlled superovulation and is performed because pregnancy is more likely to result if more than one egg is fertilized and transferred to the recipient's uterus. Sometimes several fertilized eggs at one time may be transferred to the recipient in hopes that one will attach to the uterine lining. While this increases the risk for a multiple pregnancy, it also increases the chance that at least one egg will attach and pregnancy will be established. The number of fertilized eggs to be transferred should be determined by each individual program based on the results that program has with established pregnancy complicated by multiple gestation.The recipient continues to take the estradiol and progesterone until a pregnancy test is performed, usually two weeks after the embryo transfer. If the pregnancy test is positive, the estradiol and progesterone are continues to support the early pregnancy. Blood levels of estradiol and progesterone may be monitored during this time. Extra embryos not transmitted may be frozen. If pregnancy is not achieved, these frozen embryos can be thawed and transferred later in additional attempts to achieve pregnancy.
Pregnancy Rate
The success rate of donor egg depends on many factors. In the latest statistics (1993) compiled by the Society for Assisted Reproductive Technology, an affiliate society of the American Society for Reproductive Medicine, the overall live delivery rate for donor egg programs was 30.2 percent live births per transfer. However, rates may vary considerably from program to program.
Cost
The cost of donor egg IVF varies among programs. In general, the cost will be lower if a known donor is used and often approximates the cost of traditional IVF. Known donors often only wish to be compensated for their expenses. The cost of anonymous donor egg IVF is usually higher because the donor must be compensated for her expenses, time, risk, and inconvenience associated with the procedure. These costs are unlikely to be covered by insurance programs because a large part of the treatment is to the donor.
Donor Sperm
Many couples experiencing male facor infertility may choose to undergo donor insemination (DI) in order to achieve pregnancy. During DI, thr physician or nurse places sperm from a male other than the female's partner into the female's reproductive tract near the time of ovulation. In recent years, DI has become one of the most effective methods for couples with severe male factor inertility to experience pregnancy and childbirth.
When Is Donor Insemination Needed?
Donor insemination may be indicated if there are significantly abnormal semen characteristics and if the female appears to be fertile after a series of tests. Causes for male infertility may include irreversible azoospermia, a previous vasectomy, previous radiation or chemotherapy treatment, inability to ejaculate normally, or another irreversible male fertility factor. For more information on male factor infertility, consult the ASRM patient information booklet titled Male Infertility and Vasectomy Reversal.Additional conditions that may require DI for pregnancy are when the male or female partner or both are carriers of a known hereditary or genetic disorder or abnormalities involving the chromosomes. It may also be used if the female is Rh sensitized and the male is Rh positive. Additionally, single woman who desire pregnancy may request donor insemination.
The Evaluation
In order to decide whether to undergo donor insemination, couples need to know the cause(s) of infertility and the chances of pregnancy without DI. The physician will take a detailed medical history from both partners. The male will need a complete examination, including a semen analysis.The female examination requires a pelvic exam and may include tests for STD's and other diseases. An ovulation detection kit, basal body temperature (BBT) chart, and in some cases, a cervical mucus examination may be needed to determine the time of ovulation. In addition, the physician may recommend a hysterosalpingogram, hysteroscopy, or laparoscopy to check for obstruction of the fallopian tubes and to further examine the pelvic organs. An endometrial biopsy may be need to determine whether or not adequate hormone production and endometrial development are taking place.
The Insemination Procedure
Insemination are scheduled to occur close to the time of ovulation. The time of ovulation is often estimated with the use of ovulation detection kits and/or BBT charts.When cryopreserved (frozen) donor sperm is used, the number of live sperm deposited into the uterus is often less than would be present with sexual intercourse. IUI may result in higher pregnancy potential because it can compensate for this situation. If the woman has irregular ovulation, the physician may prescribe drugs to induce ovulation. IUI may be performed in conjunction with these medications to increase the chances of successful fertilization.
The Use of Frozen Semen
Until the emergence of HIV, fresh semen was often used for donor insemination. However, it is now essential that all sperm be frozen and stored until adequately screened, since it may take three or more months for HIV to show up on a donor's blood test. The American Society for Reproductive Medicine (ASRM) recommends that all sperm be frozen for at least six months prior to insemination. The donor is screened for HIV infection at the time of semen donation. The donor is then tested again six months later so that infection undiagnosed at the first screening can be found on the second test. There are no known cases of HIV obtained from properly screened and quarantined sperm.
Screening Anonymous Donors
In most cases, anonymous donors provide semen to sperm banks for DI. Patients should make sure that the sperm bank follows screening standards and procedures recommended by the ASRM. Sperm banks should obtain a thorough medical history of the donor and his family. Donors should be less than 40 years old and preferably have established fertility. Furthermore, they should be required to undergo testing or genetic screening for common diseases, Rh factor, hepatitis B and C, HIV, and other sexually transmitted diseases. It is also recommended that less than 10 pregnancies per donor be produced to decrease the chance of offspring intermarriage.In order to prevent future medical and legal problems, it is important to make sure that the sperm bank obtains appropriate informed consent from the donor, keeps a permanent confidential record of the donor's health and screening information, and that the identity and confidentiality of an anonymous sperm donor and the recipient(s) are maintained.
Success Rate
The success rates of donor insemination depend upon several factors. First of all, the female's age is important. Woman over 35 have a significantly decreased chance of a successful pregnancy. The predictability of ovulation is another factor. The more regular the woman's menstrual cycle, the greater the chance of pregnancy. Success is more likely if the female partner has had a previous pregnancy.Recent advances in assisted reproductive technologies have allowed couples with male factor infertility, whose only previous option was donor insemination, to pursue fertility using the male partner's own sperm. With a procedure called sperm aspiration, the physician may be able to retrieve sperm from the male's testes or the tubes leading from the testes. Even though only a small number of sperm may be retrieved, techniques such as intracytoplasmic sperm injection (ICSI) can be used to inject the sperm directly into the egg to facilitate fertilization.
Donor Embryos
Embryo donation involves donor eggs that have been fertilized with sperm by the donor's partner or with donor sperm. Embryos may be donated by a woman undergoing IVF who becomes pregnant and no longer needs her fertilized eggs which were not used. These embryos are then transferred to the recipient's uterus. The resulting child will not be genetically related to the recipient or her partner. The success rate for donor embryos which have been previously cryopreserved is lower than when fresh embryos are used. The donor's permission for release of donor embryos to a recipient must be documented prior to embryo transfer. Donor embryos may be recommended under the same circumstances as when donor eggs are used. Laws concerning donor embryos vary from state to state.
Surrogacy
A surrogate is a woman who carries a pregnancy for another woman. The first surrogate pregnancy occurred in the United States in 1985. There are two different kinds of surrogates. Gestational carrier refers to a woman who carries a pregnancy created by the egg and sperm of two other individuals. This process involves IVF. In this case, the gestational carrier is not genetically related to the child.Traditional surrogacy may be considered by a woman who has no ovaries or whose ovaries cannot produce usable eggs due to declining ovarian function or premature ovarian failure. Traditional surrogacy may also be considered by a woman who has a genetic disease that may be transmitted to her child or who has a medical problem that precludes pregnancy.
Evaluation
The evaluation of the infertile couple for gestational surrogacy includes a complete medical history from both partners. In addition to a complete physical exam, some assessment of how well the female partner's ovaries function may be recommended. The male partner's semen quality should also be analyzed. Infectious disease testing is recommended for the couple and the gestational carrier. The evaluation for traditional surrogacy involves thorough testing of the surrogate and the male partner.
Surrogate Sources
Surrogates can be either known or anonymous. Known surrogates include relatives or friends who volunteer to carry the pregnancy or are paid in some way for the service. Anonymous surrogates can be arranged privately or through surrogate programs such as Organization of Parents Through Surrogacy (OPTS), a national support group and resource for persons interested in surrogacy.
Screening Surrogates
Surrogacy guidelines are not as well established as they are for donor sperm and donor eggs. The ideal surrogate is relatively young, has previously carried a pregnancy without complications, and does not have any habits, such as smoking, alcohol, or illicit drug use, risky sexual behavior, or medical disorders such as diabetes or Rh sensitization, that could jeopardize the health of the fetus. A complete medical history and physical exam should be performed as well as screening for infectious diseases. An evaluation of the surrogate's uterus may also be recommended, and psychological evaluation is strongly recommended.As with donor egg programs, the procedure for a gestational carrier involves IVF. As noted in the section on donor eggs, the gestational carrier may be given hormones to prepare her uterus for embryo transfer. The embryos from the infertile couple will then be transferred to the carrier's uterus. For traditional surrogacy, the surrogate is inseminated with the male partner's sperm via ICI or IUI near the time of ovulation. IVF is not necessary for traditional surrogacy. The success rates for gestational or traditional surrogacy can vary depending on male and female fertility factors.
Psychological Issues
Most experts recommend that infertile persons seek professional counseling prior to proceeding with third party reproduction because of the many psychological issues surrounding these processes. Psychological screening and evaluation are also recommended for all donors and surrogates. Consulting a mental health professional who is familiar with issues in third party reproduction can be extremely beneficial.
