Beluga whales found to menopause like humans; 5 such species
Scientists have discovered that beluga whales and narwhals go through menopause like humans, taking the total number of species known to experience this to five. The researchers used data from dead whales of 16 species and found dormant ovaries in older beluga and narwhal females. The other species which experience menopause include killer whales and short-finned pilot whales. 