privacy-in-practice
Check If Data Brokers Have Your Reproductive Health Data
Data brokers buy and sell health-adjacent data categories that can include period and fertility information. Here's how to check your exposure and opt out.
How Reproductive Health Data Reaches Data Brokers Data brokers do not hack your period tracker. They do not need to. The data flows to them through legitimate (if opaque) business relationships. Advertising SDKs in period tracker apps. When a period tracker includes Facebook's SDK, Google's Firebase, or other advertising tools, those SDKs transmit usage data — app opens, screen views, feature usage — to the advertising network. The advertising network feeds this data into its user profile for your advertising identifier. Data brokers purchase or license segments from these advertising networks. Purchase history. Buying prenatal vitamins, pregnancy tests, or fertility supplements through retailers that share purchase data with brokers creates a record. Your credit card and loyalty card purchases build a behavioral profile that brokers categorize. Web browsing. Visiting fertility clinic websites, reading articles about pregnancy symptoms, or searching for OBGYN offices — this browsing behavior is tracked by advertising cookies and sold to data aggregators. App install signals. The mere installation of a period tracker app can be detected by advertising networks through device level s