Ci gaban ji da ji a cikin ɗan tayin ya kasance batun karatu da jayayya tsawon shekaru.
A halin yanzu, shaidu sun nuna cewa jaririn da ke cikin mahaifar yana iya jin sautuka a ƙarshen watanni uku na ƙarshe na ciki.
Koyaya, sananne ne cewa tayi tana amsawa daga mako na 16 kodayake tsarin kunnen bai balaga ba. Masu binciken sun ce jaririn yana tsinkayar sautunan ta wata hanyar daban. Wannan madadin tsarin zuwa kunnen zai zama fata. Wannan zaiyi aiki a matsayin babban sashin mai karbar sakonni, ta hanyar yada shi ta cikin ruwan amniotic dinda tayi ya nutse a ciki.
Theananan sassan kunne na tsakiya da kunnen tsakiya suna haɓaka sama da makonni 20 na farko.
Y daga mako na 25 na ciki lokacinda jijiya ta riga tayi aiki. Dangane da Kwalejin Ilimin Yammacin Amurka, daga wannan lokacin, tayin zai iya tsinkaye, ta cikin ruwan amniotic da ke kewaye da shi, sauti a cikin jikin mahaifiya: bugun zuciya, zagawar jini, numfashi, aikin tsarin narkewar abinci. .. Shima tayi tsinkaye muryar uwa Ana yaduwa ta cikin kashin baya kuma ya isa cikin sacrum.
An tabbatar da cewa muryar mahaifiya na yin tasiri a kan tayin, amma ba don ma'anar kalmomin ba, tunda ɗan tayi ba zai iya fahimtar ma'anar magana ta magana ba, sai dai saboda yanayin tasirin kalmomin.
Hakanan an san cewa yana iya tsinkayar sautunan waje duk da cewa ruwan ɗari-ɗari ya rufe shi. Tunda sashin ji yana da matukar damuwa, ana bada shawara cewa mata masu ciki ba sa nuna kansu ga sautuka masu ƙarfi kamar kururuwa mai ƙarfi, busawa, kiɗa mai ƙarfi ... don guje wa lalacewa.
Bayan haihuwa, jariri ya tashi daga sauraren ruwa zuwa sauraron iska. An kiyaye maganan kunne ta ragowar ruwan amniotic da kuma ta nama mai kama da jelly wanda za'a sake dawowa cikin lokaci.