LAKTATSIYA

LAKTATSIYA (Lactatio; lot.las, lactis – shir), hosil va judoshavii shir dar gadudi shir.
Gadudi shir dar davrai homilagi duchori tagyirot megardad. Dar mohhoi 2 – 3-yumi haml on usora khorij menamoyad, rohhoi shirguzar vase meshavand, alveolahoi gadud inkishof meyoband. Dastgohi olie, ki faoliyati gadudi shirro tanzim mekunad, qishri magzi sar meboshad. Bad az tavallud dar organizmi zan saviyai estrogen va progesteron past shuda, gormoni hissai peshi gipofiz – prolaktin faol megardad. Ikhroji onro gipotalamus nazorat mekunad. Gormonhoi asab – oksitotsin va vazopressin ba majroi khun vorid shuda, ba hujayrahoi gadudi shir meguzarand. Onho dar hujayrahoi mazkur ba ikhroji shir musoidat menamoyand. Binobar tagyiri muvozanati gormoni dar davrai L. hayz qat meshavad.
Dar davomi du ruzi avvali badi tavallud hangomi fishurdani piston mumkin ast andake falla baroyad. Miqdori shir tadrijan ziyod gashta, dar okhiri haftahoi 2 – 3-yumi badi tavallud gadud shiri rasidai baroi tifl nihoyat zarur hosil mekunad (nig. SHiri modar). Bad az 8 – 9 haftai tavallud miqdori shaboruzii shiri piston ba haddi beshtarin (1 – 1 ½ l) merasad.
Baroi ziyod shudani shir zarur ast, ki gadudhoi shir purra kholi karda shavand (makondani tifl, dushidan va g.). Gadudhoi shir ba tasiri omilhoi beruni nihoyat hassos meboshand. L. ba vazi salomati, konstitutsiya, sinnu sol va gizoi modar, hamchunin munosibati u ba kudak va makondan vobastagi dorad. L. odatan dar okhiri soli avvali hayoti kudak va badi az sina judo kardani u qat meshavad.