Free embed
Fertility Window Calculator Embed for Websites
Show the most fertile days in a cycle with conception probability by day. Copy the code below, paste it into your site, and you're done — usually in under 30 seconds.
Prefer the full consumer tool? Open Fertility Window Calculator →
Colour theme
Custom background
Optional — click to pick a hex colour
Live preview
neutral theme
Recommended: script + div
<script async src="https://www.clearlinecheck.com/widget.js"></script>
<div
data-clearline-widget="fertility-window-calculator"
data-theme="neutral"
></div>Fallback: iframe only
<iframe
src="https://www.clearlinecheck.com/embed/fertility-window-calculator?theme=neutral"
title="Fertility Window Calculator"
loading="lazy"
style="width:100%;max-width:100%;height:560px;border:0;border-radius:12px;overflow:hidden;"
></iframe>
<p style="margin:8px 0 0;font-size:12px;text-align:center;color:#71717a;font-family:system-ui,sans-serif;">
<a href="https://www.clearlinecheck.com/tools/fertility-window-calculator?utm_source=embed&utm_medium=widget&utm_campaign=fertility-window-calculator" target="_blank" rel="noopener" style="color:#6B9E8E;font-weight:600;text-decoration:none;">Powered by ClearLine Check</a>
</p>Attribution & usage
Free for editorial use on blogs, clinic sites, midwife pages, forums, and educational resources. Keep the powered-by link intact. Widgets are educational tools — not medical advice — and should be presented that way on your site.
Frequently Asked Questions
Will this give ClearLine a backlink?
Yes. The recommended script install adds a visible “Powered by ClearLine Check” link on your page (outside the iframe), which search engines can crawl. Please keep that attribution in place.
Is this widget free to embed?
Yes. You may embed ClearLine widgets on editorial and educational websites for free. The “Powered by ClearLine Check” attribution link must remain visible.
Will the widget slow down my site?
The loader script is small and creates a single lazy-loaded iframe. The calculator runs on ClearLine’s domain, so it does not bundle into your site’s JavaScript.
Can I remove the ClearLine branding?
Not in the free embed. Attribution is required. White-label options may be offered later for partners who need unbranded widgets.
Can I match my website colours?
Yes. Choose a preset theme (neutral, sage, pink, blue, dark) and optionally set a custom background hex colour with data-bg, for example data-bg="#FFFFFF".
Does this work on WordPress?
Yes. Paste the embed snippet into a Custom HTML block (or equivalent). A dedicated WordPress plugin is not required for the iframe/script install.
