Where Our Data Comes From | Fertility Clinic Reviews

Where Our Data Comes From

Every clinic profile on fertilityclinicreviews.com is built on the same foundation: the Centers for Disease Control and Prevention's National ART Surveillance System (NASS). This page explains what that data is, what we do with it, and — just as important — what it can't tell you.

The CDC NASS dataset

NASS is the federal government's official record of assisted reproductive technology in the United States. Each year, fertility clinics report their ART cycles — including IVF, egg freezing cycles, and donor-egg cycles — to the CDC, which cleans, analyzes, and publishes the data as the annual ART Success Rates report. Because reporting is standardized across all clinics, NASS is the only apples-to-apples source of clinic outcomes in the country.

A few things worth knowing about the dataset:

• It's clinic-reported. Clinics submit their own cycle data to the CDC each year. SART member clinics report as a condition of membership.
• It's published with a lag. Collecting, validating, and analyzing a full year of national data takes time, so the most recent published dataset is typically one to two years behind the current calendar year.
• It's about ART procedures. NASS covers IVF and related procedures. It does not cover IUI, which isn't classified as ART, and its egg-freezing data reflects banking cycles rather than live births from thawed eggs.

What we show on clinic pages

For each clinic, we present:

• Profile information — location, contact details, services offered, and staff credentials where available.
• CDC-reported success rates broken down by age band (under 35, 35–37, 38–40, 41–42, over 42), shown both per intended egg retrieval and per embryo transfer.
• Donor-egg cycle outcomes, reported separately as the CDC reports them.
• The data year clearly labeled on every table, so you always know how current the numbers are.

The CDC's own caveat

We repeat this everywhere it matters because it's the most important thing to know about this data. In the CDC's words: "A comparison of clinic success rates may not be meaningful because patient medical characteristics, treatment approaches, and entrance criteria for ART may vary from clinic to clinic." A clinic's numbers reflect its patient mix as well as its medicine. Use them to verify claims and inform questions — not to rank clinics like sports teams.

How often we refresh

We update our clinic data each time the CDC publishes a new annual NASS dataset, and we label every table with its data year. If a clinic's profile information changes (new location, new services), we update it as we're able to verify it.

Patient reviews

Alongside the federal data, clinic pages include patient-submitted reviews. Reviews reflect individual experiences, not medical outcomes, and they're moderated: we remove spam, fake reviews, and content that violates our Terms of Use. Clinics cannot pay to remove or alter reviews, and they cannot pay to change their CDC data — it's federal data, and it is what it is.

This article is for informational purposes only and is not medical advice. Talk to a qualified fertility specialist about your situation.