Lydia Chako thought that her baby was covered in snakes. Reuters

Women detect snakes and other potentially dangerous stimuli more quickly during the latter phase of their menstrual cycle, according to a study.

Kyoto University researchers discovered that adult women tend to detect snakes much faster after their ovulation.

Researchers had conducted an experiment on 60 adult women. During the experiment women were shown matrices containing one snake image and eight flower images, or eight snakes and one flower; they had to detect the target image as quickly as possible.

Researchers discovered that that the reaction times were fastest when women were in the latter phase of the menstrual cycle. During this period concentrations of the hormones, estrogen and progesterone are high.

This clearly shows that fear reflex in humans increases when hormone levels are high during the menstrual cycle.