Final answer:
Women may be more attracted to certain types of male faces with masculine features and good symmetry when they are ovulating, possibly due to hormonal changes and an evolutionary preference for genetically fit mates. Human female receptivity, however, is not as restricted as in other mammals.
Step-by-step explanation:
Research in biology suggests that women may exhibit a preference for certain types of male faces when they are ovulating. This is thought to be linked to an evolutionary basis where females are more selective in choosing mates to ensure the best genetic qualities for their offspring. Variations in male facial features that might be seen as indicators of genetic health or fertility could be more appealing to ovulating women. These preferences are not as pronounced in humans as they are in other mammals, as human females can be receptive to males throughout their menstrual cycle and not just around ovulation.
During the menstrual cycle, particularly around day 14, which is the average time of ovulation, women experience a surge in hormones like LH (luteinizing hormone) and estrogen. This hormonal change prepares the female body for potential conception, affecting not only the physiology of the reproductive system but also possibly influencing mate preferences. Interestingly, while human females do not have a restricted window of receptivity, research has suggested that their mate preferences might subtly shift during their cycle, correlating with a peak in fertility.
While the exact preferences can vary among individuals, some studies have found that ovulating women might show a preference for more masculine facial features, which could be unconsciously associated with genetic fitness. Details like symmetry and skin health might also play a role. Nonetheless, these are general trends and not definitive rules for attraction.