More information: Effects of menstual cycle phases and reproductive aging stages on arousal symptoms: observations from the Seattle Midlife Women's Health Study, Menopause (2025). DOI: 10.1097/GME ...

Signs of ovulation include cramping, breast tenderness, increased sex drive, moodiness, changes in cervical mucous, spotting, increased basal body temperature.

Scientists have assembled a lab system from living tissue that can replicate a woman's 28-day hormonal cycle. The goal is to use the system to find new ways to treat a host of women's health problems.

EVATAR is a 3-D model of the female reproductive tract, capable of mimicking the subtle hormonal interplay of the menstrual cycle. Credit: Northwestern Medicine On supporting science journalism ...

There is no good animal model for the 28-day human reproductive cycle, says Teresa Woodruff, a reproductive scientist at Northwestern University in Chicago, Illinois, and a co-author of the study.

Cells that would die in a petri dish stayed alive for a standard 28-day reproductive cycle. The researchers jump-started the system's chemical communications with an injection of pituitary hormone.

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