Surrogate pregnancy monitoring is the medical care and oversight you would receive from your first positive pregnancy test through delivery and your postpartum check. It happens in two phases. The IVF clinic monitors the first 8 to 10 weeks or so. After that, an obstetrician (OB) or a maternal-fetal medicine (MFM) specialist takes over and follows you to birth. The schedule is generally closer than in a typical pregnancy, especially early on and in the third trimester.
You may be trying to picture what the next year of your body's experience would actually involve before you have committed to anything or told anyone. This page walks through it in order: what happens, who does it, what you control, and what comes next.
Surrogate Compass is an independent platform that helps women considering surrogacy understand eligibility, compensation and the process before choosing an agency. We are not an agency or a clinic. Agencies screen, match and contract, and your medical team decides your care. Everything here describes general monitoring practice. Your own care plan is set by your physicians and your gestational surrogacy agreement.
Before the Monitoring Begins: What You Need in Place
Formal monitoring starts with a confirmed positive beta-hCG blood test, usually drawn roughly 9 to 12 days after embryo transfer, depending on the clinic. Several things come before that point.
Screening and matching. You will have gone through the surrogate screening process, been matched with intended parents through an agency, and been medically cleared by the IVF clinic.
The gestational surrogacy agreement (GSA). This is a legal instrument, not a medical one. It sets out who attends appointments, how results are shared, how decisions are handled and how payments work. Clinics generally expect the agreement to be signed and legal clearance given before medication for transfer begins. Legal clearance belongs before transfer, not after, because the GSA governs everything that follows.
Two medical teams. The IVF clinic manages transfer and early pregnancy. Once it releases you, usually somewhere around 8 to 10 weeks, your own OB or a referred MFM manages prenatal care through delivery.
Step 1: Early Pregnancy Monitoring at the IVF Clinic (Weeks 4 to 10)
The first weeks are the most appointment-heavy of the pregnancy. Here is what typically happens.
- Serial beta-hCG draws. After the first positive result, the clinic usually repeats the blood test, often about every 48 hours for a few draws, to confirm levels are rising as expected.
- Hormone monitoring. You continue the progesterone and estrogen support started before transfer. Progesterone is often given as daily intramuscular injections, sometimes as vaginal suppositories, depending on the clinic. Bloodwork checks hormone levels and the clinic adjusts dosing based on the results. This medication typically continues until the clinic tapers it, often around the end of the first trimester. The surrogate medication requirements page covers the protocol in more detail.
- First ultrasound, around 6 to 7 weeks. A transvaginal scan confirms the pregnancy is in the uterus, counts the gestational sacs and looks for a heartbeat.
- Second ultrasound, around 8 to 10 weeks. This confirms continued growth and heartbeat before discharge.
- Graduation. "Graduating" from the IVF clinic means it formally releases you to OB care. Records transfer to your OB, typically including your transfer details, hCG results, ultrasound reports and medication plan with taper instructions.
As the patient, you attend these appointments and receive your results. Intended parents receive updates as your GSA provides, which is not necessarily in real time unless that has been agreed.
This phase is physically demanding. Daily injections, frequent blood draws and early transvaginal scans usually mean several clinic visits in a short span, which can mean time off work and travel.
Step 2: First Trimester OB Care and Genetic Screening (Weeks 10 to 13)
The handoff to your OB is a transition point, and the first OB visit usually includes a full history, an exam and routine prenatal bloodwork. Some surrogates continue with the OB from their earlier pregnancies. Others are referred to one with surrogacy experience, or at least one willing to follow the clinic's medication taper and the agency's documentation needs.
Visits then follow a standard prenatal schedule. A commonly cited pattern, based on guidance from the American College of Obstetricians and Gynecologists (ACOG), is roughly every 4 weeks until about 28 weeks, every 2 weeks until about 36 weeks, then weekly. Public health references such as the New York State Department of Health describe a similar baseline. Your OB sets your actual schedule.
First trimester screening options include:
- Nuchal translucency (NT) ultrasound, usually at 11 to 13 weeks. It measures the fluid at the back of the baby's neck, one marker used to estimate the chance of certain chromosomal conditions.
- Cell-free DNA (cfDNA or NIPT) screening. A blood draw from you that analyses fragments of placental DNA. It can be done from around 10 weeks.
- First trimester combined screening, which pairs the NT scan with blood markers, as an alternative to or alongside cfDNA.
Genetic screening is an area where the intended parents' wishes carry weight, because the results concern their child. Whether to screen, and what happens with results, is something the GSA commonly addresses, and many agreements provide that results go to the intended parents. The test is still drawn from your body and your records are still yours, so it helps to understand, before you sign, exactly how your agreement handles screening, results and any decisions that might follow.
Step 3: Second Trimester Surveillance and the Anatomy Scan (Weeks 14 to 27)
The second trimester is often the steadiest stretch, with regular OB visits and a few major checkpoints.
Fundal height. At each visit from around 20 weeks, your OB measures from your pubic bone to the top of your uterus. It is a simple growth check that can prompt an ultrasound if something looks off.
The anatomy scan, around 18 to 20 weeks. This detailed (sometimes called level II) ultrasound looks at the baby's brain, face, spine, heart, stomach, kidneys, limbs and growth, plus the placenta's position, the umbilical cord and amniotic fluid. It can take 30 to 60 minutes. Virtual attendance by the intended parents is common at this scan, but access is governed by your GSA.
MFM referral. You may be referred to, or co-managed by, an MFM specialist if you are carrying multiples, have had a prior cesarean, or if factors such as age, BMI or medical history put the pregnancy in a higher-risk category. Some programmes involve an MFM routinely.
Cervical length. Measured by ultrasound, often in the second trimester. It matters most for multiples, where the risk of preterm birth is higher.
Glucose challenge test, around 24 to 28 weeks. You drink a sugar solution and have blood drawn an hour later to screen for gestational diabetes. An elevated result usually leads to a longer three-hour test.
Multiples. A twin pregnancy generally means more ultrasounds, more frequent visits and earlier fetal surveillance. The American Society for Reproductive Medicine (ASRM), the professional body whose guidance IVF clinics follow, has long encouraged limiting the number of embryos transferred because of the added risks of multiple pregnancy, and many clinics transfer a single embryo for gestational carriers.