Lunaception by Louise Lacey

Written over 35 years ago, this month’s cellulite BOTM is no longer in print.  I first heard of this intriguing book two years ago in Katie Singer’s, The Garden of Fertility.  I wanted to read it right away but it was difficult to find at the time.  It addresses the subject of menstrual regularity, which to me translates as hormonal balance –an important component in our investigation into cellulite.

The book is called Lunaception: A Feminine Odyssey into Fertility and Contraception by Louise Lacey.  Louise recently made the book available by download on her website,  I’m excited to discuss her ideas with you this month. Even if you’re not concerned with matters of conception, Louise’s theory is thought-provoking. Can’t wait to hear what you think about this one!

What is Lunaception?

If you take a few moments to read over Louise’s website, you’ll find a brief explanation of the Lunaception theory.

The basic theory of Lunaception is that our bodies evolved to respond to the light and dark of the moon’s rhythms, menstruating at the new moon and ovulating at the full. To reproduce that rhythm in western civilization, we must shut out all light while sleeping except in mid-month, when we add a small night light to reproduce the effects of the full moon. What often happens is that your body will get in tune with the actual moon’s cycles, and at that point you can simply throw open your drape.

I told you this was an intriguing one!

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After opening with a personal account, Louise explains the common forms of birth control available at the time.  In the introduction to the e-book, she admits this chapter is woefully out-of-date and suggests skipping over it unless you’re interested in a historical account. She also explains that much of the information contained in her book has since been validated by scientific research.

In my correspondence with the author, Louise told me she is hoping to find a woman who wants to put together a complete bibliography and get a master’s thesis out of it in a good university. She will use the new research to update Lunaception.  If you’re a medical student and you find Louise’s theory as intriguing as I do, please drop me an email or leave a comment below. This is a rare opportunity to work with a real trailblazer in the field of women’s health!

Next week, we’ll discuss Lunaception in more deatil. But for now, what are your initial thoughts on the Lunaception theory?  Do you think it is possible to regulate menstrual rhythms by the light of the moon?

*This post is part of Monday Mania hosted by The Healthy Home Economist, Real Food Wednesday hosted by Kelly the Kitchen KopWorks for Me Wednesday hosted at We Are THAT Family, and Fight Back Friday hosted at FoodRenegade.

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Elizabeth says:

This sounds really interesting. I never really considered the timing between menstrual cycles and lunar cycles. I look forward to hearing more!


I had never considered it either before I read Katie Singer’s book, but it’s a factor I’ve kept in mind throughout the last 2 years of charting. It’s really interesting to see how things line up. I’m looking forward to this month’s discussion, too. I’m curious to hear if other women have noticed a correlation.

Jen says:

The idea is interesting, but I don’t believe in evolution. Maybe God designed us that way. Anyway, I’m interested to hear more about the theory and why people would want to follow the cycles of the moon.


That’s entirely possible too, Jen. What an elegant design that would be! Thanks for your comment.

‘Becca says:

My mom and I both tried Lunaception in the ’80s and saw no effect at all. We have some type of inherited condition (never diagnosed correctly–no, it isn’t PCOS–but several relatives have it as well) in which the cycle stops for extra weeks or even months between menstruation and ovulation. Lunaception didn’t change it.

But I can imagine it might work for women whose cycles are slightly irregular but close to 28 days, to make them exactly 28 days.

IMO, it’s less important to have a 28-day cycle or a regular cycle of any length than to know when you ovulate so that you can conceive or avoid conceiving (as desired) and know when to expect your period. An excellent book on that subject is Taking Charge of Your Fertility. It worked for me, both to conceive and to avoid, even with cycles of 35-70 days!


Thanks for telling us about your experience with Lunaception, ‘Becca. There must be so many factors that affect the timing of menstruation, it’s hard to believe that night lighting could be a hormonal cure-all. But I’m really curious to read more about Louise’s theory.

Thanks for the book recommendation! I heard about Lunaception through Katie Singer’s book, Garden of Fertility. I think it’s similar to the book you mentioned, no? I definitely agree, the important thing is to know when your body is ovulating. It’s great to hear it worked for you!

Louise Lacey says:

Thank you for bringing up this idea. You can learn more by checking out the website.

By the way, our menstruation cycle is 29-1/2 days. Not 28. The moon’s the same! Not a mistake!

And yes, I am still looking for a woman who is searching for a master’s degree and finds this an intriguing idea.

Thanks for your positive comments!



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