12 risks of surrogacy every woman should know before considering it

Large-scale medical data is reshaping the conversation around surrogacy by revealing a markedly higher rate of serious pregnancy complications.

Most of us assume that if a woman is healthy enough to become a surrogate, the pregnancy carries about the same risks as any other healthy pregnancy. But the research tells a more complicated story.

A comprehensive Canadian study that followed more than 863,000 births over nine years found that women who carried pregnancies as gestational surrogates experienced significantly higher rates of serious medical complications than women who conceived naturally or through fertility treatment for their own pregnancies.

If you’re considering becoming a surrogate—or you’re hoping to build your family with the help of one—these findings matter. Understanding the medical realities isn’t about discouraging anyone; it’s about making an informed decision with your eyes wide open. Surrogacy involves unique medical, emotional, and legal considerations that go well beyond a typical pregnancy. Before taking that journey, it’s important to understand what the research says about how it can affect a surrogate’s body and overall well-being.

Here are the 12 critical risks of surrogacy every woman must understand before moving forward.

Severe Maternal Complications

The overall safety profile of a gestational pregnancy differs significantly from a standard birth. Large scale tracking data published in the Annals of Internal Medicine shows a stark contrast in health outcomes. Gestational surrogates face a 7.8% overall rate of serious health complications. This stands in sharp contrast to the 4.3% complication rate for women undergoing standard IVF to carry their own biological children. For women who conceive naturally without medical assistance, the risk drop even further to just 2.3%.

This means a surrogate faces more than triple the baseline complication risk of an unassisted pregnancy. The underlying driver of this statistic is the genetic setup of the pregnancy itself. A gestational surrogate carries an embryo created from an egg and sperm to which she has zero genetic relation. Her body recognizes the tissue as completely foreign. This total genetic mismatch triggers a heightened vascular and immune response. The body works overtime to manage the pregnancy, which frequently leads to sudden clinical complications during gestation or labor.

Preeclampsia & High Blood Pressure

Hypertensive disorders represent a major medical hurdle in pregnancies utilizing donor eggs. A comprehensive medical meta analysis led by Masoudian and a team of researchers evaluated 86,515 pregnant women across 19 distinct studies. The data revealed that egg donation pregnancies multiply the danger of developing severe blood pressure issues. Specifically, these pregnancies are 4.34 times more likely to result in preeclampsia compared to a natural conception. Preeclampsia causes dangerously high blood pressure and protein spike in the urine, jeopardizing both the carrier and the infant.

The statistics remain elevated when comparing surrogacy to other assisted reproductive technologies. An egg donation pregnancy is 2.54 times more likely to trigger preeclampsia than standard IVF using a woman’s own eggs. Gestational hypertension risks show an even larger variance. Surrogates are 7.94 times more likely to develop pregnancy induced high blood pressure than natural birthers. They face three times the risk of standard IVF patients.

Preeclampsia Risk Multipliers (Odds Ratios)

These elevated numbers do not change based on the number of babies in the womb. A surrogate carrying a single baby faces the exact same statistical risk as one carrying twins.

In the general United States population, high blood pressure disorders impact roughly 5% to 10% of pregnancies. For surrogates, the progression of the condition moves rapidly.

Between 10% and 50% of women who start with simple gestational hypertension progress to full preeclampsia within one to five weeks. Managing this risk requires ongoing monitoring by a maternal fetal medicine specialist.

Postpartum Hemorrhage

Severe bleeding after childbirth is a life threatening emergency that occurs with greater frequency in gestational carriers. Dr. Maria Velez of McGill University led an extensive study using the Born database in Ontario, Canada, analyzing 806 births by surrogates.

The team adjusted the data for confounding maternal factors like age, weight, income, smoking habits, and pre existing high blood pressure. The final analysis revealed that gestational surrogates carry a 2.9 times higher risk of severe postpartum hemorrhage than women who conceive naturally.

The elevated risk of heavy bleeding cannot be explained by the personal health profile or fitness level of the surrogate. Healthy women with flawless past birth records still experience high rates of hemorrhage during surrogate deliveries. Dr. Velez suggested that the primary driver is an immunological mechanism caused by the genetic foreignness of the embryo. This biological friction impacts how the placenta attaches to the uterine wall, making clean separation during birth more difficult.

Bioethicist Jackie Leach Scully pointed out that historical medical records have systematically overlooked the specific physical dangers faced by surrogates. The high rate of hemorrhage underscores a critical need for stricter regulations and detailed pre pregnancy medical counseling. Surrogates must receive comprehensive warnings about these bleeding risks before signing a contract. Medical teams must also stand ready with specialized protocols during delivery to manage sudden, massive blood loss.

Preterm Birth

The use of in vitro fertilization introduces an inherent risk of early delivery. Medical data shows that the laboratory manipulation of embryos and the subsequent transfer process alter natural gestational timing. When multiple embryos are transferred to maximize the chances of pregnancy, the likelihood of carrying twins or triplets climbs. Carrying multiples serves as a primary, direct catalyst for premature labor, forcing the body to deliver before the third trimester concludes.

Preterm labor is notoriously difficult to forecast. Many surrogates who deliver prematurely show no early warning signs or historical risk factors during their screenings. To combat this uncertainty, fertility agencies enforce strict physical and lifestyle prerequisites for prospective surrogates. Candidates must maintain a body mass index between 19 and 31. Falling above or below this specific weight window alters hormonal balances and elevates early labor risks.

Agencies also mandate a minimum window of 12 months between the surrogate’s last personal delivery and the embryo transfer. This rest period gives the uterus adequate time to recover its structural integrity. When premature labor occurs despite these precautions, it triggers severe disruptions. The surrogate often faces immediate, mandatory bedrest and heavy medical interventions like labor delaying drugs. This situation creates emotional helplessness for intended parents who must rush across the country to reach the hospital. The baby is then placed directly into the Neonatal Intensive Care Unit to manage immediate respiratory and developmental issues.

Serious Postpartum Infections

Life threatening infections like sepsis occur at a significantly higher rate in gestational pregnancies. The nine year Canadian study published in the Annals of Internal Medicine tracked severe infections within its primary complication category. The data showed that the 7.8% severe complication rate for surrogates heavily involves postpartum infections. This risk level doubles the infection rate seen in standard IVF procedures and triples the rate found in unassisted deliveries.

The biological reason for this vulnerability traces back to maternal immune adaptation. During a standard pregnancy, a woman’s immune system naturally lowers its defenses so it does not attack the fetus. In a gestational surrogacy, the embryo shares zero percent of its genetic material with the carrier. This total genetic foreignness can throw the maternal immune system into disarray. The body balances between trying to protect the unfamiliar embryo and trying to defend itself from external pathogens.

This delicate immune imbalance leaves the surrogate highly vulnerable to bacterial infections during and immediately after delivery. The increased risk of sepsis remained constant even after researchers controlled for maternal age, weight, socioeconomic status, and pre existing health problems. A surrogate’s excellent health baseline cannot override this fundamental biological reality. The immune disruption caused by a foreign embryo remains a fixed clinical challenge throughout the postpartum recovery period.

Cesarean Delivery

Carrying a child as a gestational carrier elevates a woman’s probability of undergoing major abdominal surgery. A study published in the Journal of Assisted Reproduction and Genetics analyzed 836 surrogate deliveries to isolate these surgical trends. The researchers discovered that 38.2% of all surrogacy deliveries required a Cesarean section. When evaluating single baby pregnancies exclusively, the primary C-section rate reached an elevated 38.5%.

These statistics exceed national birth averages. In the United States, the overall C-section rate for all combined births hovers around 32%. The study emphasized that for surrogates with no history of prior surgical births, excellent health metrics did not lower the risk. A surrogate’s young age, optimal BMI, and history of successful vaginal births with her own children provided zero protection against a C-section during a surrogacy delivery.

The heavy hormonal preparation regimens and embryo manipulation required by IVF drive these surgical interventions. For a woman considering surrogacy, this means accepting a high probability of undergoing a major surgical procedure. A C-section requires a long recovery period and leaves permanent scar tissue on the uterus. This change introduces long term risks to her personal fertility, including potential uterine rupture or placental complications in her own future pregnancies.

Fertility Treatment Risks

The medical path toward a surrogate pregnancy requires intense pharmaceutical preparation before an embryo ever reaches the uterus. The Cleveland Clinic outlines extensive medical protocols that both the intended parents and the gestational carrier must complete. To synchronize menstrual cycles and prepare the reproductive tract, the surrogate must undergo invasive daily hormone injections. This regimen artificially manipulates the uterine lining to ensure it is receptive to an unfamiliar embryo.

These medications carry personal health side effects. The surrogate inherits standard pregnancy risks like gestational diabetes and high blood pressure, amplified by the high baseline doses of synthetic hormones. Furthermore, IVF treatments offer no certainty of immediate success. The embryo often fails to implant on the first attempt, forcing the surrogate to repeat the entire preparation cycle. This repetition multiplies the physical wear and chemical stress placed on her body.

Because of these cumulative physical strains, medical guidelines enforce strict historical limits. The American Society for Reproductive Medicine states that an ideal surrogate candidate must have a clear history of safe pregnancies and a maximum of three prior Cesarean deliveries. The medical risks are so pronounced that reproductive lawyers mandate explicit liability sign offs. The pre pregnancy contracts must formally state that the surrogate acknowledges all physical, medical, and long term health liabilities associated with IVF and childbirth.

No Guarantee of Success

While surrogacy boasts high clinical success rates under perfect conditions, a positive outcome is never certain. Data from United States fertility centers shows an overall surrogacy success rate of roughly 75%. Once a surrogate successfully achieves a confirmed pregnancy, the actual live birth rate climbs to between 90% and 95%. This high benchmark requires a combination of a proven uterus from a healthy surrogate and high quality eggs from a young donor.

When these ideal variables shift, the probability of failure rises. Dr. Brian Kaplan, a prominent reproductive specialist, emphasizes that the age and quality of the egg serve as the most critical factors in achieving a live birth. If an intended mother uses her own eggs in her 40s, the surrogacy success rate drops far below the 75% average. Even at age 38, the success rate declines due to an inherent drop in egg viability and a higher rate of genetic abnormalities.

Poor egg quality leads to repeated miscarriages and failed embryo transfers, extending the physical toll on the surrogate. The journey can also stall during the screening phase if a candidate fails the medical, genetic, or psychological tests. Dr. Kaplan warns that choosing cheap shortcuts or partnering with an incompetent agency can cause the arrangement to fall apart. Success requires flawless coordination among doctors, lawyers, and coordinators, leaving zero room for operational errors.

Emotional & Psychological Risks

The mental and psychological challenges of a surrogacy journey impact everyone involved. A surrogate undergoes a complex emotional process as she feels the baby grow and move over nine months. Navigating this close physical connection while knowing she must hand the infant over after birth makes relinquishment a deeply complex experience. The sudden shift in relationship dynamics with the intended parents after delivery can leave the surrogate feeling isolated during her postpartum recovery.

Psychological Dynamics in Surrogacy

Intended parents carry a different set of psychological weights. They often experience severe anxiety over their lack of direct control, since their future child’s health rests entirely in another woman’s hands. Many mothers struggle with internal guilt over their inability to carry a child themselves, viewing the need for a surrogate as a reproductive failure. This emotional strain can complicate the process of building a family.

Bonding anxieties also trouble intended parents who must monitor the pregnancy from afar through shared ultrasound photos and text updates. They worry whether they will feel an immediate, authentic connection to the baby at the hospital. This emotional stress gets compounded by external societal judgment and misunderstandings from friends or family. Managing these pressures requires ongoing psychological counseling and clear, legally binding communication strategies before the pregnancy begins.

Legal Risks

Cross border surrogacy arrangements often trigger intense international legal disputes regarding a child’s true identity. When intended parents travel to foreign countries to find a surrogate, establishing nationality becomes highly complex. A study published in the Indian Journal of Community Medicine documented cases where a child’s home country denied them citizenship due to conflicting foreign birth certificates. This leaves the infant legally stateless and trapped in an international administrative limbo.

Unregulated commercial agencies operating in legal grey areas often exploit these systemic loopholes. Without formal, legislated laws, these middlemen pocket the financial profits while leaving the legal rights of both the surrogate and the parents completely unprotected. Even when medical boards issue formal operating guidelines, agencies frequently violate them because the rules lack the enforcement power of actual statutory law.

Fictional real life scenarios clarify these contractual vulnerabilities. Consider a hypothetical case where a clinic error results in a total genetic mismatch, meaning the delivered baby shares no genetic connection to the intended parents. In an unregulated environment, the intended parents might legally disown the child entirely, leaving the surrogate financially and legally responsible for a infant she has no relation to. Proper contracts must include protective clauses that force the intended parents to accept legal custody regardless of clinic errors or physical birth abnormalities.

Immune System Disruption

Successful embryo implantation requires an intricate chemical dialogue between the embryo and the maternal immune system. Dr. Fernando Sánchez, a leading reproductive immunologist, explains that the endometrium functions as an active immune organ rather than a passive uterine landing pad. When this cellular communication breaks down, the risk of pregnancy failure spikes. An improper maternal immune response leads directly to implantation failures, recurrent miscarriages, and intrauterine growth retardation.

This initial cellular dialogue is driven by the innate immune system. Uterine Natural Killer cells make up 70% of all immune cells in the endometrium during implantation. These specialized cells run an immediate ID check on the embryo’s genetic tags, known as HLA antigens, using maternal KIR receptors. If the surrogate’s receptor profile and the embryo’s genetic tags are incompatible, the maternal immune system will fail to open the blood vessels required to sustain the pregnancy.

In a standard pregnancy, the immune system naturally protects the embryo. A donor embryo changes this dynamic by shifting the uterine environment toward an aggressive TH1 cellular response. This disruption doubles the baseline risk of preeclampsia from 3% to 6%. Dr. Sánchez notes that standard blood tests cannot measure this uterine environment because peripheral blood cells behave differently than uterine immune cells. Pinpointing this specific disruption requires an endometrial biopsy taken during a precise window of the menstrual cycle.

Multiple Pregnancy Risks

Medical organizations explicitly prioritize Single Embryo Transfer as the standard of care for gestational carriers. The American Society for Reproductive Medicine and the Society for Assisted Reproductive Technology issued formal guidance stating that transferring multiple embryos creates unnecessary medical risks. A study in the New England Journal of Medicine proved that a single embryo transfer followed by a frozen transfer yields identical live birth rates to a dual transfer, but with a fraction of the physical danger.

Carrying twins places an intense cardiovascular and metabolic load on a surrogate’s body. Preeclampsia impacts 19% of twin pregnancies, and that number climbs to 31% if the surrogate develops gestational diabetes. Furthermore, 82% of twin pregnancies complicated by gestational diabetes require a Cesarean section. The risk of postpartum hemorrhage also rises because the uterine muscles must stretch to accommodate two infants, making it difficult for the uterus to contract normally after delivery.

Multiple embryo transfers also compromise infant health outcomes. Centers for Disease Control and Prevention data shows that 65% of twins are born prematurely, compared to just 14% of singletons. Early delivery strips the babies of three weeks of critical lung and brain development.

Additionally, 57% of twins are born with a dangerously low birth weight. This premature birth pattern carries massive financial consequences. The average NICU admission costs $71,158 per infant, with high level intensive care running between $5,000 and $10,000 per day. A twin delivery at 32 weeks can easily result in over $200,000 in immediate hospital expenses, completely debunking the myth that transferring two embryos saves money.

Key Takeaways

• Elevated Medical Profile: Gestational surrogates experience a 7.8% severe complication rate, which is more than triple the baseline risk of an unassisted pregnancy and nearly double the rate of standard IVF.
• Hypertensive Danger: Carrying a child from a donor egg multiplies preeclampsia risks by 4.34 and gestational hypertension risks by 7.94 due to the body’s reaction to a foreign embryo.
• Surgical Probabilities: Healthy surrogates face an elevated 38.2% chance of undergoing a Cesarean section, regardless of their excellent past health history or successful vaginal births.
• Immunological Friction: The total lack of shared genetic material between the surrogate and the embryo alters uterine natural killer cell behavior, doubling preeclampsia rates and increasing life threatening infections like sepsis.
• The Singleton Standard: Transferring multiple embryos drives twin prematurity rates to 65% and elevates surrogate preeclampsia rates to 19%, making single embryo transfer the only medically sound approach.