hi, scientifically, masturbation
per se doesnt have any negative effect on marriage, mental health, fertility
, or bodily health in any form. As the semen is reformed after its loss through masturbation or by "nightfall" as that of blood formation after blood donation
or blood loss. However, u need to keep few things in mind. One should not be addicted to Masturbation as a part of sexual addiction
(e.g indulge in masturbation should not be hampering ur other routine or important works, u should be able to control the craving for masturbation, at least sometimes, if not always) . Also, u should not do it whenever u feel tense for some other reason so as to relieve that particular problem (rather u should solve that particular problem accordingly). One should go through different phases of sexual cycle before ejaculation during masturbation rather than mere physical stimulation and ejaculation.