Why Understanding Surrogacy Terminology Is Important
Surrogacy has its own language, with legal, medical, and procedural terms that rarely appear elsewhere in everyday life. This surrogacy glossary defines the reproductive medicine and family-building terminology that intended parents encounter from the initial consultation until the birth of their child. Familiarizing yourself with the terms explained here will allow you to confidently follow along in agency calls, medical consultations, and legal documents without having to ask your coordinator to translate every other sentence.
Core Surrogacy Terms Every Intended Parent Should Know
These surrogate terms form the foundation of everything else in this glossary. Once these click, the surrogacy definitions that follow build naturally on top of them, section by section.
What Is Surrogacy
Surrogacy is an arrangement in which a woman carries and delivers a baby for another person or couple, who then become the child’s legal parents. Surrogacy is an option for people who cannot carry a pregnancy themselves due to medical conditions, infertility, or other reasons.
What Is a Gestational Carrier (GC)
A gestational carrier is a woman who carries a pregnancy with no genetic connection to the baby. The embryo comes entirely from the intended parents or donors and is created through IVF before the gestational carrier is ever medically involved.
What Is a Surrogate Mother
A general term for any woman carrying a pregnancy for intended parents. In modern surrogate mother terminology, this almost always refers to a gestational carrier, not a genetic parent, though the word gets used loosely in everyday conversation.
What Is a Traditional Surrogate
A surrogate who is also the egg donor, making her the genetic mother of the child she carries. Rarely used in established programs today, largely because of the legal complexity that genetic connection creates for establishing parentage.
What Is Gestational Surrogacy
Among the most common surrogacy terms — an arrangement where the carrier has no genetic link to the baby. The embryo is created via IVF using the intended parents’ or donors’ genetic material, then transferred to her uterus.
What Is International Surrogacy
A program where intended parents and the surrogacy arrangement are based in different countries, often chosen for legal clarity, lower cost, or access to eligibility categories not available domestically.
What Does IP Mean in Surrogacy and Other Participant Roles
What does IP mean in surrogacy? IP stands for Intended Parent — the person or couple who will raise the child and hold legal parental rights once the process is complete. Every surrogacy journey involves several defined roles beyond the surrogate herself, each with a specific function.
Intended Parent (IPs)
The intended parent definition is straightforward: the future legal parent or parents of the child, whether or not they are genetically related to the baby. This can be one person, a couple, married or unmarried, depending on the jurisdiction.
Egg Donor
A woman who provides eggs for the embryo, either known to the intended parents or sourced anonymously through a screened donor database such as A.EggBank, which offers frozen donor eggs shipped directly to fertility clinics.
Sperm Donor
A man who provides sperm used to fertilize the egg, either the intended father or an anonymous or known donor depending on the family’s situation.
Surrogacy Coordinator
The agency or clinic staff member managing communication, scheduling, and logistics between intended parents, the surrogate, and the medical team throughout the program, from initial consultation through delivery.
Fertility Specialist
A reproductive endocrinologist overseeing the medical side of the program — stimulation protocols, egg retrieval, embryo transfer, and pregnancy monitoring, in coordination with the surrogate’s obstetric care team.
Fertility and IVF Terms Commonly Used in Surrogacy
Fertility treatment terms and IVF abbreviations show up constantly once the medical phase begins. Here is the fertility clinic terminology worth knowing in advance, so nothing catches you off guard during your first clinical consultation.
IVF
In vitro fertilization — eggs and sperm are combined in a laboratory to create embryos, which are then transferred to a uterus. IVF is the medical foundation underneath nearly every modern surrogacy program.
ICSI
Intracytoplasmic sperm injection — a single sperm is injected directly into an egg, commonly used to improve fertilization rates in male-factor infertility cases or when using previously frozen sperm.
Embryo
The fertilized egg after it begins dividing, before it is transferred to the surrogate’s uterus. Embryos are typically cultured for several days and graded before a transfer decision is made.
Blastocyst
An embryo that has developed for 5 to 6 days and reached a more advanced stage, generally associated with higher implantation success rates than earlier-stage embryos.
Egg Retrieval
The outpatient procedure where mature eggs are collected from the ovaries following hormonal stimulation, performed under sedation and taking roughly 20 to 30 minutes.
Embryo Transfer (ET)
The embryo transfer definition: a brief procedure placing the embryo into the surrogate’s uterus using a thin catheter, done without anesthesia and usually taking only a few minutes.
Frozen Embryo Transfer (FET)
A transfer using a previously vitrified embryo rather than one created fresh in the same cycle — the basis of ADONIS’s FET program, and typically the fastest path to transfer for families with existing embryos.
PGT-A Genetic Testing
Preimplantation genetic testing for aneuploidy — screens embryos for chromosomal abnormalities before transfer, improving implantation rates and reducing miscarriage risk.
Legal Surrogacy Terms Explained
Surrogacy legal terms determine who the legal parents are and when that status is established. This is where surrogacy process vocabulary meets real consequences.
Gestational Carrier Agreement (GCA)
The notarized contract between intended parents and the surrogate, defining compensation, medical decisions, and parental rights before any procedure begins. This document is the legal backbone of the entire program.
Parentage Order
A court or legal document establishing the intended parents as the legal parents. The parentage order meaning varies by jurisdiction and timing — some countries issue it automatically, others require a court process.
Pre-Birth Order (PBO)
A parentage order issued before the baby is born, allowing intended parents to be listed on the birth certificate immediately at delivery, without a separate post-birth legal step.
Post-Birth Order
A parentage order obtained after birth, required in jurisdictions that do not permit pre-birth establishment of legal parentage, adding weeks or months to the legal process.
Independent Legal Counsel
A separate attorney representing only the surrogate’s interests, distinct from the intended parents’ lawyer, required in properly structured agreements to avoid any conflict of interest.
Escrow Account
A third-party account holding program funds, releasing payments to the surrogate according to milestones defined in the agreement, protecting both sides from payment disputes.
Surrogacy Process Terms and Milestones
These terms mark the practical stages of a program, from first match to delivery.
Matching
The process of pairing intended parents with a compatible surrogate based on medical, legal, and personal criteria, typically taking 4 to 8 weeks in an established program.
Screening
Medical, genetic, infectious disease, and psychological evaluation of the surrogate before she is approved for a program, completed before any legal agreement is finalized.
Medical Clearance
Formal confirmation from a physician that the surrogate is medically fit to proceed with embryo transfer and pregnancy, based on full screening results and uterine evaluation.
Cycle Synchronization
Aligning a surrogate’s uterine lining preparation with the embryo transfer timeline, relevant mainly in fresh, non-frozen protocols where donor and carrier cycles must line up.
Pregnancy Confirmation
The blood test, typically 10 to 14 days post-transfer, confirming implantation through rising hCG levels, followed by an ultrasound a few weeks later to confirm a heartbeat.
Due Date
The estimated delivery date, calculated from the embryo transfer date rather than a last menstrual period, since the exact conception timing is medically documented in IVF pregnancies.
Common Surrogacy Abbreviations and Acronyms Glossary
A quick-reference surrogacy acronym guide. These common surrogacy abbreviations appear constantly throughout contracts, medical charts, coordinator emails, and agency communication — worth bookmarking this section.
IP
Intended Parent — the future legal parent of the child.
GS
Gestational Surrogacy — the standard modern arrangement with no genetic connection.
IVF
In Vitro Fertilization.
FET
Frozen Embryo Transfer — a transfer using a previously vitrified embryo.
REI
Reproductive Endocrinology and Infertility — the medical specialty covering fertility treatment, IVF, and hormonal disorders affecting conception.
PBO
Pre-Birth Order — parentage established before delivery.
GC
Gestational Carrier — the woman carrying the pregnancy with no genetic link.
TS
Traditional Surrogacy — the older model where the surrogate is genetically related.
ET
Embryo Transfer — placing the embryo into the uterus.
PGT-A
Preimplantation Genetic Testing for Aneuploidy — screening embryos before transfer.
GCA
Gestational Carrier Agreement — the notarized surrogacy contract.
Surrogacy Terms That Are Often Misunderstood
Surrogate vs Gestational Carrier
Used interchangeably today, though gestational carrier is the medically precise term — she carries the pregnancy with no genetic tie. Surrogate is the broader, more casual term that covers both traditional and gestational arrangements.
Traditional vs Gestational Surrogacy
Traditional means the surrogate is genetically related to the baby, since her own egg was used. Gestational means she is not. Gestational is the standard in virtually all modern programs for exactly this reason.
Parentage Order vs Birth Certificate
A parentage order is the legal ruling establishing who the parents are. The birth certificate is the resulting document — the order comes first, and the certificate simply reflects what the order already decided.
IVF vs Embryo Transfer
IVF is the full process of creating embryos in a lab, from stimulation through fertilization. Embryo transfer is just one step within it — placing an already-created embryo into the uterus.
International vs Domestic Surrogacy for American Parents
Domestic means the program operates within the US, under US state law. International means it operates abroad, often at lower cost, with legal frameworks and eligibility rules that vary significantly by country.