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13.11.2018 12:34:30
A woman with a desire to have a child can use a variety of methods to determine the time within her menstrual cycle that turns out to be favorable to becoming pregnant. The determination of volatile biomarkers in the form of volatile organic compounds (VOCs) by GC / MS is also effective in several respects.
When it comes to mate choice, people are less likely to follow what they see, rather what their nose registers. The human olfactory organ is versatile; It apparently perceives both olfactory and pheromones, which emit their counterparts virtually odorless and allow the organisms to communicate in a way that is unconscious for us. The volatile organic compounds (VOCs) released from the female body, which are able to trigger the man's desire, originate from the metabolism of female sex hormones; their main representatives are the estrogens and progesterone. These hormones, along with others, control the female menstrual cycle and also provide female fertility.
It can be explained, so to speak evolutionary biological, why women are perceived during their fertile days of the male nose as particularly attractive. Meanwhile, it has also been recognized why some women or their individual body odor in men arrives better than the smell of another woman: on the man especially attractive effect women with high estrogen levels and low progesterone levels. A hormone level with high levels of estrogen and low levels of progesterone indicates fertility. However, it does not last a lifetime at a consistently high level, but decreases with age. Biologically, this can be explained by the fact that the ratio of sex hormones shifts to the detriment of estrogens.
This fact is opposed to the desire of not a few women to choose the time of pregnancy and to adapt their motherhood to their own living conditions. It works as long as Mother Nature plays along. However, for some women the road to pregnancy turns out to be rocky and difficult: for an estimated 1.6 million women in the United States aged 44 and under, trying to get pregnant naturally becomes a challenge, says Stephanie Marie Ong from Arizona State University, USA.
According to Ong, the market for fertility diagnostics can be estimated at $ 3.5 billion in the US. However, with the help of these diagnostic methods, according to the scientist, up to now no statements can be made as to the likelihood of a woman becoming pregnant in principle and 2 as she becomes older. Although it is possible to accurately determine the time of ovulation in different ways - and thus also the optimal time for the act of procreation -, for. by means of basal temperature measurement, calendar method or special ultrasound or endocrinological examinations. However, common to all common clinical and home-based methods, writes Ong, was that they evaluated only a single point in time. They lack the ability to "quantify changes in hormonal metabolism over time," which would make it easier to make general statements about fertility. There are still many unanswered questions regarding ovulation and physiological conditions as well as time-limiting factors. Finding the right answers to them could help make an important contribution, positively influencing women's reproductive fitness, Ong is convinced.
