Watanni ashirin da daya na ciki yana nuna rashin raguwa a cikin karuwar tayi. Tun daga wannan lokacin, za a auna girmansa daga kambi zuwa sheqa, yayin da kafin an yi shi daga kambi zuwa tailbone. Yanzu yana kimanin kimanin kimanin mita 380 kuma yana da tsawo kimanin 26.7 cm. Waɗannan su ne cikakkun bayanai, kuma zasu iya bambanta sauƙi bisa nau'ikan dalilai. Ƙafafun yaron ya kara ƙaruwa, jikinsa kuma yana daukan nauyin daidai. Yunkuri na tayi a makon 21 yana da kyau sosai, kuma ana iya jin su ba kawai ta mahaifi ba, har ma da dangi.
A wannan lokacin jaririn ya riga ya kafa gashin ido, girare. Zai iya yin haske. Idan tayin yana da jinsi namiji, ƙwararrun sun riga sun shige, kuma a cikin 'yan makonni zasu sauka daga kogin pelvic zuwa cikin tsinkayen.
Da farko da makon 21 na tayi na tayi, zai riga ya ji ku. Zaka iya karanta littattafai zuwa gare shi ko hada da waƙoƙin kiɗa. Hanya wannan za ku yi kama da zaɓin musayar jaririn ku. Tayi a cikin makon 21 na ciki zai fara jin dandano abincin da mahaifiya ke ci. Wannan yana faruwa ne ta hanyar haɗiye ruwa mai amniotic . Ta haka ne, daga yanzu za ku iya samar da zafin abin da ake so a jariri.
Tsarin al'ada na jikin tayi a mako 21
Gabatarwa da tayi a makonni 20 zuwa 20 yana nazari ta duban dan tayi. Sifofin tayin a mako 21 ya ba shi izinin tafiya cikin mahaifiyarsa a cikin mahaifiyarsa kuma za'a iya gani sosai. A wannan mataki na ci gaba yana da muhimmanci a gano ƙayyadaddun nauyin zuciya na fetal, aiki na locomotor, girman ƙananan, tsinkayyar hanzari, raguwa na ciki, kirji na diamita, gaban da ci gaban kwakwalwa.
Turarrun tayi na tayin a mako 21 ya kamata a sami waɗannan abubuwa
- girman kai na farko a wannan lokaci ya kasance daga arba'in da shida zuwa hamsin hamsin;
- Girman matsakaicin launi na gaba shine a cikin kewayon sittin zuwa saba'in da biyu;
- Yankin kai - 166 - 200 mm;
- Yanayin tayin ne 144 - 187 mm.
A wannan lokacin, an ƙaddara anatomy na tayin, gabanin gabobin ciki, tsarin fuskar da kwarangwal. Yanzu yana kallon bakin ciki, kuma babban aikinsa shi ne bunkasa tsokoki kuma tara mai. Don yin wannan, mahaifiyar da zata tsufa dole ne ya ci.