A Quick Note on the Evidence

Neither surrogacy nor adoption science really runs on randomized controlled trials (RCTs). The reason is pretty obvious when you think about it: you can't ethically tell someone, "Congratulations! You've been randomly chosen to have a baby through a surrogate. Better luck next time, control group!" And you can't take a bunch of kids and say, "Okay, half of you get adopted, half of you stay in institutions." That would be monstrous. So instead, scientists use longitudinal cohort studies, registry analyses, and case-control comparisons. The most famous adoption-adjacent study, the Bucharest Early Intervention Project, did pull off something close to an RCT — randomizing institutionalized Romanian orphans to foster care versus continued institutional care passed ethics review as an improvement. We have decades of solid data. The science is real and well-established, even if the gold standard isn't always available.

Two Paths, One Destination

For families who can't or don't want to build their family through traditional pregnancy, two big alternative paths open up: surrogacy (where someone else carries the baby for you) and adoption (where you become the legal parent of a child who was not born to you).

These are wildly different experiences. Surrogacy is high-tech, expensive, often involves genetic connection, and creates a new child with intent. Adoption is mostly legal and social rather than biological, can range from nearly free to enormously expensive, and gives a home to a child who already exists. Both are complicated, both are emotionally intense, and both — when they work — produce some of the most profoundly wanted children on the planet.

People turn to one or the other (or sometimes both) for many reasons:

• A medical condition that makes pregnancy dangerous or impossible.

• The absence of a uterus.

• Same-sex couples building families.

• Single people who want to become parents.

• Repeated, heartbreaking pregnancy losses.

• Wanting to add to an existing family.

• Connecting with a relative's child who needs a home.

• Foster parents falling in love with the kids in their care.

• Religious or personal calling.

Let's dig into each path, then compare them side by side.

Surrogacy

Surrogacy is when one person (the surrogate or gestational carrier) carries and delivers a baby for someone else (the intended parents). Think of it like the most generous favor in human history. Forget helping your friend move a couch — try carrying a tiny human for nine months.

The Two Flavors of Surrogacy

Traditional surrogacy. The surrogate uses her own egg, fertilized (usually through artificial insemination) with sperm from one of the intended parents or a donor. This means the surrogate is also the genetic mother of the baby. It sounds simple — and biologically, it is. But legally and emotionally? It's a tangled spaghetti bowl of complications. Because the surrogate is genetically related to the baby, courts in many places have a much harder time terminating her parental rights. In some U.S. states, traditional surrogacy contracts aren't even legally enforceable. Yikes. Most agencies don't even offer it anymore. It's like the rotary phone of surrogacy: it technically still exists, but almost nobody chooses it on purpose.

Gestational surrogacy. The surrogate has no genetic connection to the baby. The embryo is created in a lab through in vitro fertilization (IVF) using an egg from the intended mother (or an egg donor), sperm from the intended father (or a sperm donor), and a laboratory full of glassware and biology. The embryo then gets transferred into the surrogate's uterus, where it (hopefully) implants and grows. The surrogate is essentially the world's most thoughtful Airbnb host, providing premium nine-month accommodations. This is the dominant form of surrogacy today, accounting for the vast majority of arrangements.

Altruistic vs. Commercial

Surrogacy also splits along money lines.

Altruistic surrogacy is when the surrogate isn't paid beyond her actual medical expenses. She might be a sister, a best friend, or a remarkably generous stranger. Countries like the United Kingdom, Canada, and Australia only allow altruistic surrogacy.

Commercial surrogacy is when the surrogate is paid a fee on top of expenses — often $40,000 to $70,000 in the United States, depending on the state and her experience. Yes, "experience" is a thing. Surrogates who've successfully carried before often earn more, just like any other skilled work. Commercial surrogacy is legal in some U.S. states, illegal in others, and banned entirely in many countries. The ethical debates here are intense and deserve their own essay (or fifty), but the short version is: people disagree fiercely about whether paying someone to carry a baby is empowering, exploitative, or some complicated mix of both.

The Surrogacy Process

Buckle up. This is going to take a while, because so does the real thing.

Step 1: The intended parents get their ducks in a row. Choosing an agency (or going independent), hiring a reproductive lawyer, getting medical evaluations, creating embryos through IVF, and saving an enormous pile of money.

Step 2: Matching with a surrogate. Agencies screen surrogate candidates carefully. Standard requirements include age 21 to 40, at least one healthy prior pregnancy, generally healthy with a body mass index in a certain range, non-smoker, no recreational drug use, stable home life and finances, passes psychological evaluation, and no history of major pregnancy complications. Once approved, she and the intended parents meet to see if it feels like a fit. Both sides have to choose each other. This isn't a "you get what you get" situation.

Step 3: Legal contracts. Lawyers draft a detailed contract covering compensation, medical decisions, what happens with multiples or complications, communication during and after pregnancy, insurance, and approximately six thousand other things. Both parties have separate lawyers. This step alone can take months.

Step 4: Medical screening and embryo transfer. The surrogate gets cleared, takes hormones to prepare her uterus, and then — drumroll — the embryo is transferred. It's a quick outpatient procedure where a doctor uses a tiny catheter to place the embryo into the uterus. It feels very anticlimactic for something so important. There's no movie-style music. Just science.

Step 5: Pregnancy. Standard prenatal care, but with extra communication, ultrasound photo sharing, and often a lot of group texts with way too many emojis. Many intended parents attend appointments. Some surrogates and intended parents become genuinely close friends.

Step 6: Birth. In states with surrogacy-friendly laws, the intended parents are legally recognized as parents from birth, sometimes even before. In other places, additional legal steps (like a stepparent adoption) are needed afterward. The hospital usually has a clear plan in place ahead of time so nobody is figuring this out during contractions.

Step 7: Going home. The intended parents take the baby home. The surrogate recovers, often with the support of her own family, and most arrangements include some ongoing contact (cards, photos, occasional visits). Studies suggest most surrogates do not regret their decision and feel positively about the experience years later.

The Challenges of Surrogacy

The cost is, frankly, bonkers. In the United States, gestational surrogacy typically costs $130,000 to $250,000+. This includes agency fees ($25,000 to $45,000), surrogate compensation ($40,000 to $70,000), IVF and medical costs ($30,000 to $60,000), legal fees ($10,000 to $20,000), insurance ($10,000 to $30,000), plus miscellaneous costs that pop up like uninvited party guests. This is why surrogacy is largely available only to wealthy people, which is itself an ethical issue worth thinking about.

The legal maze. Surrogacy law varies wildly. In the U.S., it's regulated state by state. California and Nevada are surrogacy-friendly. Michigan, until very recently, wouldn't enforce surrogacy contracts at all. Internationally, it's even more chaotic — what's legal in one country can land you in prison in another. International surrogacy has sometimes resulted in babies being temporarily stateless, which is exactly as nightmarish as it sounds.

Medical risks for the surrogate. Pregnancy is never risk-free. Surrogates face the same risks as any pregnant person — gestational diabetes, preeclampsia, hemorrhage, blood clots, postpartum depression — plus the risks of IVF medications and embryo transfer procedures.

Emotional complexity. For surrogates, separating from a baby they've carried is psychologically real, even when they fully expected and chose it. For intended parents, watching someone else carry your child can produce strange mixtures of gratitude, jealousy, anxiety, and awe. Reputable agencies offer mental health support to all parties.

Ethical debates. People reasonably disagree about whether commercial surrogacy commodifies bodies, exploits poorer women, or — on the other hand — offers women meaningful, well-compensated work that they freely choose. The truth is probably "yes to all of the above, depending on the situation." Honest people can land in different places.

What the Research Says About Surrogacy

The Cambridge Longitudinal Study. Dr. Susan Golombok's research team at the University of Cambridge has followed children born through surrogacy from infancy into adolescence. Their findings, published in journals like Developmental Psychology and Human Reproduction, are based on a longitudinal cohort design with well-controlled comparisons to naturally conceived families. Surrogacy children show no significant differences in psychological adjustment. Parent-child relationships are generally warm and secure. Children told about their origins early (before about age 7) tend to adjust better than those told later. Most families maintain some contact with the surrogate, and it's generally positive.

Surrogate outcomes. Cohort studies of gestational surrogates (such as work by Olga van den Akker and others) consistently find that the large majority of surrogates do not experience clinically significant grief, regret, or psychological harm after relinquishing the baby. Most describe the experience as meaningful and rewarding. This finding is remarkably stable across studies.

The honest caveat. These studies aren't RCTs, and they can't be. There's also some risk of self-selection bias — families willing to participate in research might differ from those who aren't. Researchers try to control for this, but it's a real limitation. The honest answer is: surrogacy outcomes look reassuringly positive in the data we have, but the data has its limits.

Adoption

Adoption is the legal process where an adult (or couple) becomes the permanent legal parent of a child who was not born to them. It transfers all parental rights, responsibilities, and the unending obligation to find missing socks.

Adoption has existed in some form across nearly every human culture in history. Ancient Romans did it. Ancient Egyptians did it. Modern adoption with formal legal procedures, court oversight, and home studies is mostly a 20th-century invention, refined heavily after researchers realized that just handing babies to strangers in alleys, while efficient, was not great for anyone.

The Many Types of Adoption

Adoption is not one thing. It's a whole ecosystem.

Domestic infant adoption. What most people picture: a baby is born, the birth parents (usually the birth mother) choose adoption, and the baby goes home with the adoptive family within days. Through a private agency or attorney. Reality check: this is actually one of the less common adoption paths today. Birth rates are down, single parenthood is more accepted, and far fewer infants are placed for adoption than people assume. Wait times can stretch from 1 to 7+ years.

Foster care adoption. Children in the foster care system whose birth parents' rights have been legally terminated can be adopted. In the U.S., there are roughly 400,000 children in foster care at any given time, and more than 100,000 are waiting to be adopted. These children tend to be older (average age around 8), many are part of sibling groups, and foster-to-adopt arrangements are common (you foster first, then adopt if reunification with birth family isn't possible). It is the least expensive adoption path — often nearly free, with subsidies available for the child's ongoing needs.

International (or intercountry) adoption. Adopting a child from another country. Much more common in the 1990s and 2000s — peaking in the U.S. around 2004 with about 23,000 international adoptions per year. Today, that number has dropped dramatically (under 2,000 per year recently) due to countries closing or restricting international adoption (Russia, China, Guatemala, Ethiopia, and others), stricter international regulations (the Hague Convention), and growing recognition that domestic placement within a child's birth country is generally preferable when possible.

Stepparent and relative (kinship) adoption. When a stepparent legally adopts their spouse's child, or when a grandparent, aunt, uncle, or other relative adopts a child whose parents can't care for them. Kinship adoption is the most common form of adoption in the United States. It's often the simplest legally because there's already a family relationship.

Open vs. closed adoption. Not a separate type so much as a feature that can apply to several of the above. Closed adoption: No identifying information shared between birth and adoptive families. Records sealed. Standard before about 1980. Open adoption: Birth and adoptive families know each other and have ongoing contact — letters, photos, visits. Most domestic infant adoptions today are at least partially open. Semi-open adoption: Information exchanged through an agency intermediary, but families don't have direct contact. The shift toward openness is one of the biggest changes in modern adoption, and the research strongly supports it.

Embryo adoption. A relatively newer option where embryos created during another couple's IVF treatment (and not used by them) are "adopted" by people who then carry and birth the baby themselves. Legally, it's often handled as a property transfer rather than a true adoption, but the family-building outcome is similar.

The Adoption Process

Strap in. Adoption involves more paperwork than buying a house and getting married combined.

Step 1: Decide what type of adoption fits you. Costs, wait times, and life experiences vary enormously between paths. Some couples switch types midway when they learn more.

Step 2: Choose an agency, attorney, or both. For domestic infant: usually an agency or adoption attorney. For foster: your state's child welfare department. For international: a Hague-accredited agency. For kinship: often your family attorney.

Step 3: The home study. The famous one. A licensed social worker assesses you and your home, including background checks (criminal history, child abuse registries), financial review, medical clearance, personal references (3 to 5 people), multiple in-person interviews, a walk-through of your home (smoke detectors, gun storage, swimming pool fences), and autobiographical writing about your childhood and parenting plans. It sounds intense because it is. Home studies typically take 2 to 6 months and cost $1,500 to $3,000.

Step 4: Prepare your profile. For domestic infant adoption, prospective parents create a "profile book" — a charming little scrapbook that birth parents review when choosing an adoptive family. It's like online dating, but for becoming someone's parent. People agonize over which photos to include. ("Should we use the one with the dog? Birth parents love dogs, right?")

Step 5: Wait. Then wait some more. The wait can range from days (for some foster adoptions) to many years (for some international or specific-criteria domestic adoptions). This is the part nobody warns you about: how psychologically taxing the waiting is.

Step 6: Match and placement. A child is matched with the family. For infant adoptions, parents often travel to the hospital. For older children, there's often a transition period with visits before placement.

Step 7: Post-placement supervision. After the child comes home, the social worker visits multiple times over 3 to 6 months to check that everyone is adjusting. Spoiler: parents usually look exhausted. This is normal.

Step 8: Finalization in court. A judge makes the adoption legally permanent in a (usually celebratory) court hearing. Many families dress up and bring relatives. Some judges hand out little teddy bears.

Step 9: Lifelong adoption parenting. Adoption isn't a one-time event — it's a lifelong identity for the child and family. Conversations about adoption evolve as the child grows. Most adoption professionals now encourage open, ongoing, age-appropriate conversation rather than treating adoption as a "secret" or something only mentioned once.

The Challenges of Adoption

Cost. Costs vary enormously by type:

The expensive paths can put adoption out of reach for many families, which is why foster care adoption is so often emphasized as both a need and an opportunity.

Wait times and disappointment. Domestic infant adoptions can fall through if a birth parent changes their mind during the legally allowed revocation period (which varies by state). This is heartbreaking but is also the birth parent's legal right. Reputable agencies prepare adoptive families emotionally and have support systems for these situations.

Identity and loss. Adopted children often grapple with questions about their birth families, why they were placed for adoption, and where they fit. This is normal, healthy, and developmentally appropriate — not a sign that something has gone wrong. Modern best practice is to talk openly about adoption from the very beginning, before the child can even fully understand, so adoption is never a "reveal" or a secret. Adopted children can experience grief related to their adoption — even when they were placed as newborns and have wonderful adoptive families. Both things can be true: an adopted person can love their adoptive family deeply and grieve aspects of their adoption story.

Transracial and transcultural adoption. When adoptive parents and adopted children are of different races or ethnicities, additional considerations come into play. Research consistently shows that transracial adoption can work beautifully when adoptive parents actively engage with their child's culture of origin, build community with other families who share that background, acknowledge and discuss racism rather than pretending to be "colorblind," and seek out mirrors and mentors who share the child's identity. When parents skip this work, transracial adoptees often report feeling isolated and disconnected later in life.

Birth parent considerations. Birth parents (particularly birth mothers) can experience long-term grief, even when they actively chose adoption and feel it was right. Modern ethical adoption practice includes counseling for birth parents both before and after placement, and recognition that birth parents are part of the adoption triad — not just a footnote in someone else's story.

Older child and foster adoption challenges. Children adopted from foster care or after trauma may have attachment difficulties, behavioral or developmental challenges, educational delays, and mental health needs. These children absolutely can and do form secure, loving family bonds — but it often requires specialized parenting strategies, therapy, and a lot of patience. Trauma-informed parenting is now the gold standard.

What the Research Says About Adoption

The Bucharest Early Intervention Project (BEIP). Probably the most famous adoption-adjacent study and one of the few actual randomized trials in this space. Starting in 2000, researchers (Charles Nelson, Nathan Fox, Charles Zeanah and others) studied institutionalized Romanian children — a context where institutional care was so severe that randomizing children to high-quality foster care versus continued institutional care passed ethics review as an improvement. Children placed in foster care before about age 2 showed dramatic improvements in cognitive development, brain activity, and attachment compared to children who remained in institutions. Earlier placement consistently produced better outcomes. The findings transformed how the world thinks about institutional care for young children.

The Minnesota Texas Adoption Project. A long-running cohort study comparing adopted children with their adoptive parents and (where possible) biological parents. Adopted children's cognitive abilities and personality traits show the influence of both genetics and environment. Adopted children largely thrive in adoptive homes. Adoptive families function as well as non-adoptive families on most measures.

Research on open adoption. Multiple longitudinal cohort studies (Grotevant and McRoy, among others) have followed open adoption families for decades. Open arrangements generally remain stable over time. Adopted adolescents in open adoptions often have a more secure sense of identity than those in closed adoptions. Birth mothers in open adoptions tend to experience less unresolved grief. Adoptive parents in open adoptions report less anxiety about birth parents than they expected. The shift toward openness is supported by the data.

Mental health outcomes. Large registry studies (especially from Scandinavian countries, where data is excellent) have found that adopted children, on average, show slightly elevated rates of mental health service use compared to non-adopted peers. This is true but easily misunderstood. Adoptive parents often have above-average resources to seek mental health care, leading to more diagnoses, not necessarily more illness. Some adopted children have prenatal exposures or early adversity contributing to risk. Adoption itself can introduce identity-related stressors. Importantly, the vast majority of adopted children fall within the typical range of psychological adjustment. The narrative that adopted kids are inevitably troubled is not supported by the research.

The honest caveat. Outside the BEIP, almost all adoption research is observational. Selection bias is real — families who agree to long-term studies might differ from those who don't. Adoptive families with the most resources are best represented in the data. We should hold these findings with appropriate humility, but the overall picture — that adoption, done thoughtfully, is generally good for children and families — is robust.

Surrogacy vs. Adoption: Choosing a Path

Both paths lead to family. They lead there very differently. Here's a side-by-side to help frame the decision.

When Each Tends to Make Sense

Surrogacy tends to fit when: You want a genetic link to your child, you (or your partner) cannot safely or physically carry a pregnancy, you have the financial resources, and you're willing to navigate complex legal and IVF processes. It's especially common for same-sex male couples and for women whose health makes pregnancy dangerous or impossible.

Adoption tends to fit when: A genetic link isn't a priority, you want to provide a home for a child who needs one, you're open to a wider range of ages and backgrounds, or you're navigating finances that make surrogacy unrealistic. Foster care adoption in particular meets a real societal need and is the most accessible path financially.

Some families do both. Surrogacy for one child, adoption for another. Or surrogacy after adoption falls through, or vice versa. Family-building isn't a one-track decision.

The Big Takeaway

Both paths are messy, expensive in different ways, complicated, and — when they work — genuinely beautiful. The science doesn't support the panicked "what about the children?" fears that dominate some cultural conversations. Children born through surrogacy do well. Children placed through adoption do well, especially with openness, early placement, age-appropriate honesty, and trauma-informed parenting. Surrogates generally do well. Birth parents, when supported, generally do well. Intended and adoptive parents are some of the most prepared, motivated parents you'll ever meet, because nobody accidentally builds a family this way.

There's room for nuance here. Adopted people can grieve aspects of their stories and love their families. Birth parents can be at peace with their decisions and sometimes still mourn. Surrogates can find the experience meaningful and describe relinquishment as emotionally complex. Intended and adoptive parents can be wildly grateful and occasionally exhausted. These paths hold all of this. So can we.

Neither path is for everyone, but for the families who walk them, they are real, increasingly well-understood, and worth taking seriously.

Sources for the curious: Golombok, S. et al., longitudinal studies on assisted reproduction families, University of Cambridge Centre for Family Research; van den Akker, O. (2007), reviews of surrogate motherhood; American Society for Reproductive Medicine practice guidelines; Nelson, Fox, & Zeanah, Bucharest Early Intervention Project; Grotevant, H. & McRoy, R., longitudinal Minnesota Texas Adoption Research Project; Brodzinsky, D. et al., research on adoption psychology; U.S. Department of Health and Human Services AFCARS reports for foster care statistics. RCTs in this field are extremely rare for ethical reasons; most evidence is from longitudinal cohort studies and registry analyses.