Mene ne girman nau'i?
Girman girman jaririn (ko BDP na tayin), teburin kowane likitan da ke kwarewa a tantance ilimin lissafi ya kamata ya san, yana ɗaya daga cikin filayen ƙididdiga na shekarun haihuwa. An ƙayyade sakamakon sakamakon duban dan tayi. An kiyasta darajar sanarwar wannan alama a makonni 12-28 na ciki.
BDP - nisa tsakanin ke ciki da ƙananan ƙananan ƙasusuwan nama, wato, layin da ke haɗuwa da ƙananan kasusuwa na kasusuwa. Dole ne ya wuce ta thalamus. Wannan shi ne ake kira "nisa" na kai, wanda aka auna daga haikalin zuwa haikali tare da ƙananan wuri.
Ga kowane lokaci na gestation, akwai wani darajar alƙallan da aka yi la'akari a cikin al'ada. Yayin da ciki tayi girma, wannan alamar yana karuwa, amma ta ƙarshen gestation yawan girma yana ragewa sosai. Kashewa daga ka'idodin da aka yarda da shi yana haifar da ɓarna daga sakamakon da aka samu, wanda aka ƙayyade tsawon lokacin ciki.
Tebur na girman bishiya na tayi
Da ke ƙasa ne BDP tebur. Yana nuna alamun littattafai daga 11 zuwa 40 makonni na gestation, tun da yake a wannan lokacin da masana kimiyya duban ƙarfe ya auna shi a kowace binciken.
Bai kamata a kiyasta wannan fassarar ta dace ba, amma tare da launi na frontal-occipital. An auna su a cikin jirgin guda daya kuma sun bambanta cikin daidaituwa daidai da lokacin ci gaban intrauterine. Don iyakar daidaituwa, ana auna ma'aunin ciki da tsawon cinya.
Gwargwadon BDP yana ba da damar gano wasu matsaloli a cikin ci gaba da jariri, wato: ci gaba da ɓarna a cikin intrauterine, hydrocephalus, nauyin kima na babba (idan wannan ya wuce) ko microcephaly (idan sun kasa). A wannan yanayin, ana bukatar la'akari da sakamakon sauran ma'auni.