I-Conception iyenzeka xa iselwana lesini sesini (isistim cell) singena emzimbeni wesibini kwaye idibanisa neqanda layo leqanda. Ngenxa yoko, iseli elitsha (zygote) lwakhiwa kwaye ukuveliswa kombungu wesintu kuqala. Kuphela kwiiveki ezisibhozo zokuqala zophuhliso lwe-intrauterine, umntwana ubizwa ngokuba ngumntwana okanye umbungu. Kwixesha elizayo libizwa ngokuba sisiqhamo.
Kwiiveki ezisibhozo zokuqala, izitho eziphambili, zangaphakathi nangaphandle, zibekiwe. Ngokubonakala kwimbungu, akukwanakwenzeka ukucacisa ngesondo se-embryo - kuya kwenzeka kuphela emva kwesinye iiveki ezimbini.
Amanyathelo okuphuhliswa kombungu womntu
Makhe sibone indlela ukuphuhliswa kwamanyam Ngexesha lokuchumisa, kukho iisuclei ezimbini kwiqanda. Xa zidibanisa, i-embryo engabonakaliyo yenziwe, apho ama-chromosomes angama-23 kayise ayongezwa kuma-chromosomes angama-23 omama. Ngaloo ndlela, isethi yama-chromosomes kwisisele se-embryo iinqununu ezingama-46.
Emva koko, imbungu yomntu iqala ukuhamba ngokuthe ngcembe kwinqanaba le-fallopian ukuya kwisibeleko. Kwiintsuku ezine zokuqala, i-fission yeeseli zombungu ivela malunga nanye ngosuku, ngelizayo iiseli ziqala ukwahlula ngokuphindaphindiweyo ngokukhawuleza.
Kulo lonke ixesha isisu sisilungiselela ukuthatha umntwana, i-mucosa yayo iba yimbi kwaye iminye imiphefumlo yegazi ivela kuyo. Malunga neentsuku ezisixhenxe emva kokuqalwa kwesibindi sokuqalwa kombindi, kuqhubeka malunga neeyure ezingama-40. I-Vorsels ebusweni be-embryo yanda kwaye ikhula ibe zizicubu zesisu. I-placenta yenziwe.
Ekupheleni kweveki yesibini, ubude bombindi womntu bufikelela kwi-1.5 millimeters. Ukusondela kweveki yesine, ukubunjwa kwamalungu amaninzi kunye nezicubu ziqala - amaqabunga omzimba wesifo, amathambo, iintso, amathumbu, isibindi, isikhumba, amehlo, iindlebe zibonakala.
Ngeveki yesihlanu ubude bombindi sele sele malunga ne-7.5 millimeters. Ngoncedo lwe-ultrasound ngeli xesha, umntu unokubona indlela intliziyo yakhe ehla ngayo.
Ukuqala ngeentsuku ezingama-32, imbungu yesibindi isinezakhiwo zezandla, kunye neveki kamva - iindawo ezinyaweni zeenyawo. Xa isonto le-8 lophuhliso liphela, umbungu ufumana ubude kummandla we-3-4 cm. Bobabini isakhiwo sangaphakathi se-embryo kunye nokubonakala kwayo kwangaphandle kufumana zonke iimpawu zomntu. Ukubethelwa kwazo zonke izitho eziphambili ziphela.
Izinto ezichaphazela ukuphuhliswa kwembungu
Ukutshaya
I-Nicotine inokuyithintela lula umntwana esibelethweni, ngenxa yokuba umntwana osemnyangeni amabini okuqala uyabakhathalela kakhulu ukungabikho kwomoya, kwaye xa ukutshaya kungenakupheka.
Utywala
Impembelelo yotywala ekuphuhlisweni kwembungu ayikho into embi. Umzekelo, ukusela ngexesha lokukhulelwa kungakhokelela kwisilonda esiswini somnyoba, esibonakaliswe kumaphulo amaninzi okuphuhlisa. Kunobungozi kakhulu nangona kusetyenziswe utywala ngokutsha, xa kwenzeka ngexesha lokufakelwa okanye ukubunjwa kwelungu. Ukuphuhliswa kwe-alcohol syndrome kubangelwa yimpembelelo ye-ethyl yotywala, okubangelwa ukuphungula ukukhula komzimba, ukuphulwa kwe-CNS, ukuphazamiseka kobuso kunye nezitho zangaphakathi.
Zi yobisi
Umphumo weziyobisi kumntwana ubonakaliswe ekunciphiseni ukuphuhliswa kwentuthuko, iimpazamo ezininzi zophuhliso, izifo ezibangelwa yintlungu, ukufa kwe-intrauterine. Kukho rhoqo ukubeleka okubangelwa ukupheliswa kweziyobisi kumzimba womntwana.
I midiyo
Umntwana okhulelweyo unomdla kakhulu kwimiphumo yombane. Ukutshatyalaliswa komama ngaphambi kokuba kuqaliswe ukufakwa kwodonga lwe-uterine, kubandakanya ukufa kombungu. Ukuba umbane onobungozi uthintela ixesha le-embryogenesis, izimo ezimbi kunye nokuphuhliswa kokuphuhliswa kukukhula, amathuba okufa kwakhe akhula.