# Where the facts on a listing come from

Lesson 1 of [Read a fertility clinic listing](https://fertilityclinics.fyi/academy/read-a-fertility-clinic-listing.md), 12 minutes.

A listing on this site is a record. It is not a recommendation and it is not an endorsement.

## The source

Most listings come from the CDC National ART Surveillance System (NASS). It is the public register of US clinics that report assisted reproductive technology (ART) cycles. The CDC publishes clinic-level datasets on its open data site. This site reads those datasets and makes one listing for each clinic. The CDC data is public domain. The attribution is the Centers for Disease Control and Prevention.

## Who reports the facts

Each clinic reports its own services and numbers to the CDC. This site does not audit them. A listing shows what the clinic reported.

## The source note

Every listing has a source note. It names where the facts came from and the data year, and it gives the date this site read the source. Read the note first. The facts can be out of date, so confirm services, costs and opening times with the clinic.

## Facts that come from the clinic

Cost, insurance, financing and telehealth fields stay empty until a clinic claims its listing and adds them. Those facts come from the clinic, not from the CDC. An empty field means unknown.

## What this site is not

This site is a directory. It is not a clinic and it does not give medical advice. To report a mistake on a listing, write to hello@fertilityclinics.fyi.

## Sources

- CDC National ART Surveillance System (NASS), clinic-level datasets, https://data.cdc.gov/d/ix4g-rt8v
- FertilityClinics guide, Fertility clinics in the United States, updated 2026-10-20
- FertilityClinics guide, How to read a fertility clinic listing, updated 2026-10-20

This course is general information, not medical, legal or financial advice.

Also on the [web page](https://fertilityclinics.fyi/academy/read-a-fertility-clinic-listing/where-the-facts-come-from).

> Success rates are whole-clinic figures reported to the CDC; they do not show any one patient's chance of success. Talk to a doctor or other qualified clinician before you choose a treatment.