In general, people are quicker to react to scary snakes than they are to pleasant flowers. A third group of 20 participated during the late follicular phase and the luteal phase. The other photos were of flowers, a neutral, non-scary image. Other hormones, including estradiol and cortisol, also vary with the menstrual cycle and could play a role in this increased awareness of danger, the researchers wrote. Twenty women participated during the early follicular phase of their cycle, or the fifth day after the start of the menstrual period, and during the late follicular phase, or the 25th day of the cycle right before ovulation. There was no difference in snake-detecting ability between the early and late follicular phases. During the luteal phase, or premenstrual portion, of the menstrual cycle, women are quicker at detecting photos of snakesa threatening stimulus, than they are during the early and late follicular phase of the cycle, when the ovaries prepare to release an egg.
A new study suggests that women can detect snakes faster during the premenstrual phase of their menstrual cycles.
Women Spot Snakes Faster Before Their Periods
Each woman completed the experiment twice over two to three months. A third group of 20 participated during the late follicular phase and the luteal phase. She covers the world of human and animal behavior, as well as paleontology and other science topics. This hormone is particularly high in the luteal phase of the cycle. Another 20 participated during the early follicular phase and the luteal phase, day 13 of the cycle right around when ovulation occurs. Citing other hormonal studies, the researchers speculate that heightened levels of the hormone progesterone could increase anxiety. There was no difference in snake-detecting ability between the early and late follicular phases.