The sexiest day is ovulation day, the last of the 6 fertile days. It is not yet clear if the reason is the increase in libido, since the woman is more attractive in those days, or maybe it is the intercourse that accelerates ovulation
David Rep, Haaretz, Walla News
Frequency of intercourse before and after ovulation (Chart: "Haaretz")
In some mammals, estrus is the cause of intercourse at the time of ovulation. In cats, on the other hand, intercourse is what causes ovulation
The terms "window of opportunity" and "six days" - which are repeated again and again in the article published last July in the scientific journal "Human Reproduction" - have nothing to do with the situation in the Middle East, but rather with the chances of conception in a person.
The window of opportunity for conception in a woman lasts six days each month. In a study conducted by a team led by Dr. Alan Wilcox, from the National Institute of Environmental Health in Durham, North Carolina, the hypothesis was tested that the frequency of intercourse increases during these six fateful days significantly.
As far as the 68 women from North Carolina who participated in the study are concerned, the results are unequivocal: from the data collected regarding them, it appears that on the six fertile days they had intercourse with an average frequency of 24%, compared to the other days. Women in their 20s and 30s, all sexually active and in long-term relationships with a partner, participated in the study. To try to simulate natural hormonal action, only those who do not use hormonal contraceptives (pills) were selected.
The women were asked to keep an orderly diary and record in it the days of monthly bleeding and the frequency with which they had intercourse with their partners. Most of them provided information on three full cycles, and all of them passed a urine sample every morning, to determine the exact day of ovulation. The six days of fertility were determined so that the day of ovulation is the last of them.
In the study, a total of 171 ovulation cycles of the 68 women were recorded. As mentioned, his results indicate a clear increase in intercourse during fertile days. The peak is the day of ovulation, after which a sharp decline is noticeable.
What preceded what?
In other mammals, clear methods have been developed to increase the chance of intercourse on the "unsafe" days. Estrus behavior, for example, may manifest itself in the fact that the female releases pheromones, which attract the males to mate with them; There are animals in which the method is different: in cats it is mating that leads to ovulation, and not the other way around.
The authors of the article believe that humans also have mechanisms designed to increase the frequency of intercourse in the days close to ovulation - a phenomenon documented in their research. They present three possible explanations for this. The first explanation depends on the frequency of sex in the increase of sexual desire in the women, for example due to a hormonal reason related to the approaching ovulation. A second explanation attributes the sexual initiative to the man. Here too, for example in light of physiological changes, the woman may be perceived as particularly attractive in those days.
But there is also a third explanation, according to which it is not the ovulation that increases the sexual desire, but on the contrary - it is the sex that accelerates the woman's ovulation. The authors of the article take this possibility seriously, relying on data (not particularly surprising), according to which the frequency of intercourse increases on weekends. In connection with these data for the high frequency of ovulation days at the beginning of the week, precisely, as their research shows, they suggest seeing the first phenomenon as the cause of the second.
Their disapproval of this theory relates to the fact that weekends are not only characterized by frequent sex, but, sometimes, by rest or physical activity. It seems that much more research is needed to examine the possible connection between intercourse and ovulation in humans.
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