Abstract: A method for increasing the fertilizing capacity of sperm cells, which method includes irradiating sperm cells with non-coherent red light in a discontinuous manner according to a pattern that includes at least one sequence of two irradiation periods of specific durations, which are separated by an intermediate period of darkness of a specific duration. Each of the specific periods of irradiation and darkness lasts between 8 and 15 minutes.

Abstract: The invention relates to an apparatus for blocking nucleic acids by means of photoactivating intercalating agents, comprising: a housing (1) with an upper wall (1a) with one or more through holes (2), intended for inserting therethrough one or more test or microcentrifuge tubes (3), each of which contains a respective sample (M) including nucleic acids and photosensitive intercalating agents mixed in liquid form, and one or more LEDs (L1, L2, L3, L10, L20, L30) mounted inside the housing (1) such that they emit light, according to one or more determined directions, towards respective parts (3a, 3b and 3c) of said of tubes (3), to photoactivate the intercalating agents in order to covalently bond them to free or accessible nucleic acids.