How accurate are these predictions?

Accuracy depends heavily on cycle regularity. Users with regular cycles will receive more precise windows via `predict_fertility_window`, while irregular cycles result in broader, more conservative estimates.

Can I check the probability for a specific date?

Yes, you can use the `get_conception_probability` tool to receive a specific probability score and determine if a date is a peak fertility day.

What data is required to use these tools?

Most tools require the date the last period started, the average cycle length, and whether the cycle is regular.

Fertility Window Predictor MCP Connector for Claude

A+

Predicts fertile windows and ovulation timing based on menstrual cycle patterns.

4 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides biological calculation tools to help users understand their reproductive cycles. By analyzing cycle length and regularity, it calculates the fertile window, identifies the peak fertility day, and estimates ovulation timing. It uses predict_fertility_window to provide a complete overview of reproductive milestones, get_conception_probability to check specific dates, get_cycle_summary for current cycle status, and compare_cycles to evaluate cycle stability.

fertilityovulationmenstrual-cyclereproductive-healthbiology

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_E1wxoXpdvYIXgTUzN403g7NDufFkBJZQCNw19YZt/mcp

② Claude Code (terminal)

claude mcp add --transport http fertility-window-predictor https://edge.vinkius.com/vk_preview_E1wxoXpdvYIXgTUzN403g7NDufFkBJZQCNw19YZt/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "fertility-window-predictor": {
      "url": "https://edge.vinkius.com/vk_preview_E1wxoXpdvYIXgTUzN403g7NDufFkBJZQCNw19YZt/mcp"
    }
  }
}

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