siistercode
Decode Your
Hormones
If you have ever Googled your symptoms at 2am wondering if you are normal, you are in the right place.
Built by two sisters who spent years searching for answers.
Start here
FREE SMART CYCLE TRACKER
Find out what your hormones are doing
Discover your hormonal life stage and what it actually means for you
Then grab this too
Free — takes 2 minutes
Build your Hormone Blueprint
A personalised read on your hormones, your symptoms, and what your body is actually doing right now
The Hormone Intelligence Platform
Everything you have ever wanted to know about your hormones, in one place that actually makes sense. Built for real women at every stage of life, from the first period to the last hot flush and everything in between.
Get in early
Founder pricing is only available to the first women through the door. Drop your email and we will tell you the moment it is ready.
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"Your hormones are not the problem. The silence around them is."
Siistercode
Now on Etsy
The answers your doctor never had time to give you
Phase-by-phase guides written in plain language. What your hormones are doing, why your body feels the way it does, and what you can actually do about it. No jargon, no fluff. Written by two women who lived every page of it.
Who we are
We started this because we needed it ourselves.
Guillermina is 42, living in Romania, navigating perimenopause. Bella is 35, in London, postpartum. Two sisters at completely different hormonal stages, working it out in real time.
We got tired of appointments that went nowhere, symptoms brushed off as stress, and advice that just did not fit our actual lives. So we started asking better questions, doing the research, and sharing everything we found.
SIISTERCODE is what we wish had existed. Hormone education that is honest, practical and written by women who are living it right alongside you.
Guillermina
42 · Romania
Co-founder
Bella
35 · London
Co-founder