The Beautiful Cervix project.

From the homepage (link):

The Beautiful Cervix Project is a grassroots movement celebrating the beauty and intricacies of women’s bodies and fertility! This website provides accessible information about women’s fertility and menstrual cycles and showcases photographs documenting changes in the cervix and cervical fluid throughout the cycle.

The Beautiful Cervix Project teaches cervical self-exam and fertility awareness as a revolutionary path of promoting respect, confidence, and health. We believe that this form of self-empowerment and education will help contradict shame and misinformation around women’s reproductive health and choices, affecting positive change from the personal to global levels.

We hope The Beautiful Cervix Project inspires our readers’ curiosity to observe and appreciate what is normal for each one of us as we track the subtle changes in our bodies throughout our cycles.

The website includes a gallery of photos of cervixes in a range of states (e.g., different times of the cycle, during pregnancy, during procedures, abnormalities, etc.). There are also two sub-galleries with photos from each day of one woman's cycle. The photos are all accompanied by descriptions of observed physiological changes. Here's a sample:

Day Two

Blood – Dark red, medium/light flow

Breasts – normal

Basal body temperature – 97.2 F (and remains between 97 F and 97.4 F until day 20)

See the rest of her series of photos here.