A ƙarshen makonni 4 'ya'yan itacen ya girma zuwa 1 mm kuma girmansa a yanzu yana da nau'in iri. A wannan mataki na ci gaban, tayi daga fetal tayi zai fara canzawa a cikin amfrayo. Yayin da aka haifa a cikin makon 4, yawancin 'ya'yan itace ne kawai, amma kuma kadan ne, amma amfrayo yana jin dadi sosai kuma yana da karfi sosai an haɗa shi da bango na mahaifa.
Da farko tare da wannan lokacin, an samar da cibiyar intanet a cikin wuri inda aka sanya embryo zuwa bangon uterine. Wa] annan 'yan bindiga sun ha] a da jaririn nan da mahaifiyarsa, kuma ta hanyar da su ba zai samu duk abin da ke bukata ba don rayuwa da ci gaba. Lokacin da tayi tayi makonni huɗu, to sai amfrayo zai fara ci gaba da gabar jiki, samar da abinci mai gina jiki, numfashi da kariya. Wadannan jikin sun hada da:
- Chorion . Wani membrane na embryon na waje wadda ke inganta halittar ƙwayar halittar, wanda aka cika a ƙarshen makon goma sha biyu.
- Amnion . Kullin, wanda shine tarin fuka mai tayi, samar da ruwa mai amniotic, wanda aka samu amfrayo.
- Jakar kwai . Har zuwa shekara bakwai zuwa takwas, yana da alhakin hematopoiesis na amfrayo.
Ta yaya tayin yake kama da makonni 4?
Mutane da yawa sunyi mamaki yadda tayin yake cikin makonni hudu. A wannan lokacin, yana kama da faifai wanda ya ƙunshi sassa uku na sel - ƙwayoyin ƙwayar cuta:
- ectoderm (matsananciyar Layer), wanda ke da alhakin samuwar fata, gashi, tsarin juyayi, ruwan tabarau da enamel na baki;
- Endoderm (Layer ciki), da alhakin samuwar tsarin narkewa, hanta, thyroid da pancreas;
- lakabi (tsakiyar Layer), wanda ya haifar da shi a cikin kwarangwal, ƙwayoyin haɗin kai da tsokoki, jini da tsarin jinƙai, kwayoyin halitta.
Zubar da ciki zai kasance bayyane kawai a karshen mako, idan an yi hCG-bincike. Game da jarrabawar gida, ba koyaushe yana iya gane irin wannan lokacin ba, saboda hurarrun matar ta ƙunshi rashin adadin hormones.