Le eyoyikekayo "Esibelekweni"

Indlu yokuqala ka wonke umntu - esibelekweni sikanina - phantse lonke wokubuk 'yaye bekhululekile. Noko ke, kwiiveki 38 (malunga 266 iintsuku), phakathi ukukhulelwa nokuzalwa olukhulu ebomini, ingakumbi kwiiveki zokuqala 8 kunalo naliphi na ngexesha ubomi babo ukuya elishumi lesithoba. Kodwa nangona ingozi, uninzi abantwana kweli hlabathi siphilile ngokugqibeleleyo kwaye ngexesha elifanelekileyo.

Ngokwemveli, oogqirha kokwaba uphuhliso intrauterine izigaba ezithathu ezilandelelanayo - ezintathu:

• 1 ithatha iiveki 12;
• Okwesibini - ukususela kwiiveki 12 ukuya 28;
• Okwesithathu - ukususela kwiiveki 28 ukuya kwixesha lokuzalwa komntwana.

Izazi kunye embryologists, yena, bakhetha zahlule Esibelekweni 3 kumaxesha olungalinganiyo: osandul, osandul foetal.

Sonke uqala nje into engaphiliyo, na uhlobo iiseli ezimbini ezidibeneyo equlathe zofuzo 46, mvisiswano leyo, kwelinye icala, ukuba isixa kuchulumancisa omkhulu ulwazi malunga obu bomi entsha umithe. Okubangel 'umdla kukuba, e China kucingwa ukuba wokuzalwa imini kwesisu, hayi ukuzalwa komntwana. Eli siko, kubalulekile ukuphawula nesiphumo esiphawulweyo kuniko inani kwezisu.

Pre-natal uphuhliso umntwana neveki :

kwiiveki 0-2. Icandelo lokuqala iqanda luqala emva kweeyure 24-36 emva kokukhulelwa. Ngexesha leeyure zokuqala-40 emva kokuba iiseli yokuqala nangoku ngokwahlula zonke efanayo. 3-4 elilodwa imihla ibandakanya 12-16 iiseli kwaye ibizwa ngokuba morula, ubukhulu balo nama ulingana kanotaka. Emva kweentsuku 4, iiseli umabela aqale umahluko kwaye ziyahlukana zibe ezimbini ungqameko intsholongwane: iifom engaphandle iqokobhe lokukhusela imveku - ngumkhaya elizayo kwaye ukusuka embindini uya kuba umbungu efanelekileyo. kwenzeka uphuhliso vetshe ityhubhu Imibhobho, ngaloo ndlela bakha blastocyst. ke yena siwungena isibeleko ingena kwisisu yayo incamathela le zesibeleko eludongeni ukuya endometrium - le nkqubo ibizwa ngokuba umzila. Oku kwenzeka kwiintsuku 10-14 emva kokukhulelwa. Kweli nqanaba iphela nge kuqala uphuhliso siswini osandul foetal. Malunga ne-60% ye-blastocysts akaqhotyoshelwanga isibeleko yaye ke ngoko, musa ukufikelela ixesha osandul. Abaninzi kubo abe iingxaki zophuhliso rough. Ngenxa yoko, uhlobo ayivumeli ukuba kuzalwe abantu nonviable.

kwiiveki 3-8. Iqala ngexesha osandul zophuhliso. Kweli nqanaba, i kuyondelelaniswe kwemichiza eyahlukahlukeneyo ngxelo imbi sifo unina, ukuthintela ligatya kumntwana esikule yequmrhu angaphandle kweli wesibeleko. Ukongeza, ngokubonakalayo kuhlelwe hormone yabantu chorionic gonadotropin (ngokwesiseko apho ukukhulelwa banesifo) - ime sexesheni yabafazi. Kwakhona, ukunyuka kweqondo pathways (10-25%), yokuphefumla, nokuhamba kwegazi. Ukususela kwiiveki 3 umntwana ongekazalwa kwixesha ethe kakhulu lokukhula. Le ezintathu lokuqala lophuhliso - ixesha morphogenesis, xa kukho lwesithuba zonke izihlunu kunye namaziko. Izazinzulu zithi ukuba eli xesha ngumgaqo eziphambili kakhulu eyiyo ukuba onokuyicinga! Nditsho ukwakhiwa kunye sungula-Hewana kunye nokuthabatha inxaxheba amawaka abantu kunye zobuchwepheshe kungekhona elukhuni, njengoko uphuhliso lwabantu intrauterine!

Kweli nqanaba, i nobuninzi isisu ezizenzekelayo ezinxulumene ubukho iziphene chromosomal ezinzulu. Kananjalo amathuba ephezulu isisu ngenxa iimeko engafanelekanga wesibeleko eli bhinqa. Kuphela 1 ka-6 iimbumba asinde ukuya kwiiveki-8. Ngeli xesha, umbungu kakhulu uvakalelo kwiimpembelelo evela ngaphandle, ngoko ke lo mfazi kufuneka silumke kakhulu kwaye uphephe amayeza, ukuselwa kotywala, ukutshaya.

Ekupheleni kwale xesha kuchaphazela morphology umntwana cishe akunakwenzeka.

Kwiiveki 3 umbungu inkulu kune original amawaka 10 amaxesha.

Kwi kwiveki yesi-3 yophuhliso wabumba uvaleke - ingqondo spinal cord kwase eziphuhliswe imfesane yosana kunye beendawo.

Iveki yesi-4 - kuleka intliziyo. Ekupheleni kweeveki ezi-4, oko aqale azibethe ngokwahlukileyo evela kumzali. Qala ukwakha amehlo. uvaleke luvalwe. Izinga lokukhula Umbungu imalunga ne-1 mm ngosuku.

Iveki yesi-5 - kuba kunokwenzeka sele ukubona izandla neenyawo zomntwana.

Iveki yesi-6 - baqale ukwakha amalungu esini. Xa sihluleka eli nyathelo inokuba ukubunjwa kwabantu ukuba iimpawu amadoda namabhinqa. Kweli xesha umbungu sele ebonakalayo ultrasound.

7 ngeveki, ukuyilwa iziphene abantu ezifana inkalakahla emqhokrweni wengxondorha. skeleton ezimile.

Ngu kwiveki 8 ikwagqibezela lokusekwa amalungu ezinkulu. Uphuhliso olukhawulezileyo zobuchopho.

Ukususela kwiiveki 9 uphawula ekuqaleni kwethuba lokugqibela Palsy. Kunye kwiiveki 13 maternity iqala senyanga yesibini yokukhulelwa. Kweli thuba umntwana ufana nje usana, ezincinane kuphela. Nangona entloko nangoku uhlasela enkulu. Umzimba ayinakolulwa kwaye elide. Umama okhulelweyo uthi amandla. Nangona ingozi, uphuhliso ngakumbi, njengokuba umthetho, yimpumelelo. Kweli nqanaba ingqondo iqalisa ukusebenza.

Ngomhla oya kulandela kamva akayi iingunqu: umntwana ekhula ubukhulu, ukuphucula amalungu ayo, ukuba le kwiveki ye-16, unina sele uziva nentshukumo yayo ukuya kwiiveki 20 ziqala ukukhula iinwele.

Ngo-7 iinyanga ikhombisa sele ukwazi ukuphefumla ngokuzenzekelayo, ukwetyisa ukutya, ukusebenza ngokupheleleyo inkqubo excretory. Kwimeko apho ukuzalwa ngaphambi umntwana kufuneka ukuba baphile ngokwabo.

Oku kubonakaliswa ukuba leenyanga ezi-3 zokugqibela yophuhliso yayo siswini, umntwana sele nako ukuphendula olujongwayo lubonwe. Ihamba ngononophelo, hiccups, ekhala. qwa esisiseko yaphuhliswa: ivumba, ngaphandle kwebala, incasa, ukubona, ukuva. Kunye kwiiveki 16 womntwana uyiphendula isandi (ilizwi eyahlula) ukukhanya.

Ngenxa yoko, usuku umntwana 266 ekugqibeleni ufumana intloko phantsi isikhundla kwaye ukulungele bazalwe.

Kuphela-5% of the waphawula ebunayo ezingekazalwa kulogo ekupheleni ukukhulelwa (iiveki emva 22).

Fetal Uphuhliso iveki neveki - ingcaciso ebaluleke kakhulu: ngokuba unina - ukuqonda iinkqubo emzimbeni wayo kunye neengozi ezinxulumene nazo, ngokuba noogqirha - iliso kuphuhliso umbungu, kunye nakuluntu luphela - ukuqonda ukuba ukususela mzuzu ekumitheni iqala inkqubo ngokukhawuleza kwaye entsonkothileyo kakhulu ukwakha ubomi obutsha, kungekhona biomass kwakudala.