gorillas go through menopause

a study done by the brookfield zoo in chicago has documented menopause in gorillas

The oldest gorilla in captivity is believed to be 51-year-old Jenny at the Dallas Zoo. She was one of 30 gorillas in the study and among the 23 percent of older gorillas found to have undergone menopause when researchers measured the gorillas' hormones.

Another 32 percent of the older gorillas showed irregular hormone patterns over several months, signs that they, too, might be approaching menopause.

The average age of the post-menopausal gorillas was 44. In American women, menopause hits around age 51.