A healthy majja dhatu leads to a healthy shukra dhatu . ” Majja sneham balam shukra pushtim pooranam astinaamcha karoti “ .This means Majja dhatu nourishes body and helps to maintain its functions. Majja dhatu strengthens body, fills bones and nourishes shukra dhatu (semen).
According to modern sciences scientists are trying to establish relation ship between bone marrow and sperms. In a BBC report scientists have successfully made immature sperm cells from human bone marrow samples.
Doctors have published papers about “Recovery of spermatogenesis and successful conception after bone marrow transplant for acute leukaemia:” ( https://humrep.oxfordjournals.org/cgi/content/abstract/15/1/83 )
According to Chinese medicines theory .Marrow is formed from the overflowing kidney semen that is stored in the bone cavities. Kidneys produce marrow and the bones are the dwelling places for the marrow. Therefore, both semen and marrow are the most treasured part of the human body, and the Chinese compare the most valuable things in the world to them.