It’s not difficult to tell when a female chimpanzee is in heat. As she nears ovulation — the point in her cycle when she’s most fertile — her bottom swells up like a balloon and turns bright pink…
Biology and sexual orientation - Wikipedia
Acoustic characteristics in the different phases of the menstrual cycle
PDF) Does a Woman's Skin Color Indicate Her Fertility Level?
PDF) Men's, but not Women's, Sociosexual Orientation Predicts Couples' Perceptions of Sexually Dimorphic Cues in Own-Sex Faces
Physical attractiveness - Wikipedia
Interactions between perceived stress and microbial-host immune components: two demographically and geographically distinct pregnancy cohorts
Do Women's Faces Change Color Over the Menstrual Cycle?, by Dr. Robert Burriss
An exploratory, cross-cultural study on perception of putative cyclical changes in facial fertility cues
PDF) Do women's preferences for men's facial hair change with reproductive status?
Frybread Face and Me (2023) - News - IMDb
Reproductive Health Technologies: From Design Feature to Defect - Bill of Health
