In work by the method of Monte-Carlo of mathematical statistics conducted the analysis of intervals between the days of birth of genetic relatives (4-5 generations) in 33 randomly selected family trees (1408 people). In result revealed the phenomenon of incomplete randomness of distribution of dates of birth among genetic relatives related to long-period harmonics -waves, well-known from the theory of earthly tides (modulated S 2 (period 12 h.)): a Solar elliptical wave S a with the period of

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... omalistic year (365.259640 days), a Solar declination wave S sa with period of a half of tropical year (182.621095 days). The sampling volume of 440-880 trees suggests detection of a similar reaction also from the modulated M 2 (period 12 h. 25 min.) wave lunar long-period harmonics: a Lunar elliptical wave М m with a period of anomalistic month (27.554551 days), a Lunar declination wave М f with period of a half of tropical month (13.660791 days), as well as periods of a half (14.765294 days) and of whole (29.530588 days) of the synodic month. The sum of M 2 and S 2 waves reaches a maximum at syzygial tides during the new moon and full moon. The impact on humans of abovementioned regular cosmogeophysical oscillations may occur due to variations in the electrochemical properties of the water in organism, which invokes variations in the intensity of secretion of hormones because of the electro-permeabilization, including sex hormones (testosterone), which are also responsible for the ability to work and volitional qualities of man. The question requires careful attention from the viewpoint of the protection of health of astronauts during the deep space missions, including also protection from the dysfunctions of the endocrine system in an environment where there are no sources of electromagnetic background, natural for the surface of Earth.