Watanni na 13 na tayi na ciwon tayi yana da mahimmanci, a wannan lokacin an kafa dangantaka tsakanin "tsarin jariri".
Bari muyi la'akari da yadda jaririn yake tasowa a wannan lokacin na ciki.
Placenta
A wannan lokaci, mahaifa ta kammala aikinta. Yanzu tana da alhakin ci gaba da tayi, samar da adadin yawan hormones na estrogen da progesterone. Girma daga cikin mahaifa yana kimanin 16 mm. Wannan abu ne mai wuyar damuwa ga abubuwa daban-daban, amma a lokaci guda yakan wuce ta cikin carbohydrates, ƙwayoyi da sunadarai wajibi ne don tayin.
Girma tayi a mako 13 na ciki
'Ya'yan itace a makonni 13 yana da nauyin nau'i 15 - 25 g da kuma girman 7 - 8 cm Zuciyar irin wannan ƙwayar halitta a yau yana tayar da lita 23 na jini. Da ƙarshen makonni 13-14, 'ya'yan itace zasu sami tsawon 10-12 cm, nauyin 20-30 g, kuma mai kai diamita kimanin 3 cm.
Ƙaddamar da gabobin tayi da kuma tsarin a cikin 13 zuwa 14 na mako na ciki
Dabarar farawa ci gaban kwakwalwa. Ra'idoji suna bayyana: soso na jariri ya juya, hannayensu suna matsawa cikin kafa, yana iya farawa, ƙwaƙwalwa, cire yatsunsu cikin bakin. A wasu lokatai 'ya'yan itacen suna ciyarwa sosai, amma mafi yawan lokutan yana barci.
Halin jikin mai jariri mai taushi yana ci gaba, amma har yanzu babu wani abu mai laushi, don haka jikinsa yana wrinkled kuma ja tare da kananan jini da ke nunawa.
Samun tsarin kashi yana ci gaba. A makonni 13, tayin ya riga ya sami glanden thyroid wanda ya dace da shi, saboda abin da allurar ke kwance cikin kasusuwa. Ƙasusuwa daga cikin gabar jiki na sannu a hankali ya zama tsayi, tsinkayar kullun da kasusuwa na kashin baya farawa, ƙananan hakarkarin ya bayyana, farkon hakora madara ashirin.
Tayi a cikin makon 13 na ciki kuma yana da tsari na numfashi. Yaron yana numfashi. Idan tayin zai fara shan wahala daga rashin isashshen oxygen, to sai wasu daga cikin ruwan hawan amniotic ya shiga cikin huhu.
A wannan lokaci glandan karuwanci ya fara farawa cikin yara. 'Yan mata suna samar da kwayoyin halitta. Jigilar jima'i na ci gaba da bambanta da yawa: jigilar halittar ta jiki ya fi tsayi kuma a hankali ya juya ko dai a cikin azzakari ko cikin mai baka, yana fadi ƙasa. Ta haka ne, jinsi na waje ya zama ci gaba don ya bambanta yarinyar daga yaro.
A cikin hanji na jaririn akwai nau'i, wanda ke taka muhimmiyar rawa wajen aiwatar da tsarin narkewa da inganta abinci. Kwayar jini yana farawa a cikin hanta, kullun kashi, da kuma yarinyar tayin. Ci gaban kashi na farko na insulin farawa tare da pancreas. Gidan muryar yaron ya fara farawa.
Halin wari yana tasowa - jariri ya kama wari da dandano abincin da mahaifiyarsa ke amfani da su. Ba duk mahaifiyar menu na iya zama abin da yake so ba, kuma ya fi dacewa da wasu jita-jita. Masana kimiyya sun gano cewa idan mace bayan haihuwarsa ya canza canjin abincin, zai iya haifar da wasu matsaloli a cikin nono, saboda jariri yana tunawa da ƙanshin da yake kumfa a cikin tayin.
Game da bayyanar crumbs, ƙarshe yana samun ƙarin fasali. Shugaban tayin ba zai sake matsawa ga kirji ba, da gada na hanci, da bishiyoyi, da kwatsam. Kunnuwa suna cikin matsayi na al'ada. Abubuwan da ido ke fuskanta, amma har yanzu ana rufe su da fashions.
Yawanci aikin da aka tsara akan sassan jiki da kuma tsarin jiki sun rigaya an yi, lokaci ya yi don samar da yanayin tunani. A wannan lokaci, yarinya yakan ji kuma yana fara amsawa da alamun da ke fitowa daga duniyar waje (sanyi, dumi, duhu, haske, sautuna, shafe), jagorancin sababbin ƙwarewa.