Iiveki ezili-12 zokukhulelwa zibaluleke kakhulu ekuphuhlisweni kwengane: i-trimester yokuqala iphelile, i-placenta isakhiwe ngokusisiseko, ingozi enkulu yokuhlaselwa kwezilwanyana ezinzima kunye nokukhupha isisu kusemva. Sifunda oko esi siqhamo "esinokuziqhayisa" kwiiveki ezingama-12 kunye nendlela ukuphuhliswa kwayo kwenzeka ngayo ngalo mhla.
Inatomy of the fetus 12 iiveki
Kwiiveki ezili-12, imbungu yomntu, nokuba yinto engumntwana, ekugqibeleni ithathe isimo kwaye ifana nendoda encinci. Zonke izitho zisezindaweni zazo, kodwa ezininzi zazo azikasebenzi, kuphela ezizona zinkulu kunye nezona zibalulekileyo. Ngaloo ndlela, intliziyo yesine yamagumbi atshaya nge-frequency ye-150 beats ngomzuzu, isibindi siqala ukuvelisa i-bile enesidingo sokugaya amafutha, isisu senza ukucutshulwa kwe-peristaltic, kunye nezintso zivelisa umchamo.
Ingqondo yengqondo yeeveki ezili-12 iyafana nengqondo encinci yomntu omdala: onke amasebe ayo asekwayo, kwaye ezinkulu i-hemispheres zihlanganiswe nge-convolutions. Umzimba we-pituitary, ophantsi kwindawo engaphantsi kwengqondo, uqala ukuvelisa ama-hormone.
Usana lusenakuphazamiseka: intloko ibonakala inkulu ngaphezu kwesiqu. Kwiiveki ezi-11 ukuya kwe-12 umntwana usengumzimba omncinci kwaye akabuki njengomntwana osanda kuzalwa. Ixesha lokulondoloza amanqatha liya kuza emva koko, kwaye ngoku izidumbu zenza kwaye zikhule, ukubunjwa kweethambo zethambo ziqala, kwizinsini zibonakalisa iindawo ezinamazinyo asisigxina, kunye neminwe yezandla kunye neenyawo ezincinci. Ngoku udinga i-calcium kunye neeprotheyini kunanini ngaphambili, ngoko umama ozayo kufuneka ancedise ukutya kwakhe kunye nemveliso equkethe ezi zinto.
Ekupheleni kweveki ye-12 ukubunjwa kwenkqubo yokuzala yomntwana kuza kuphele. Ngoku ngoku uncedo lwe-ultrasound unokwazi ukuba inkwenkwe izalwe okanye intombazana. Egazini lomntwana, ngaphezu kweeseli ezibomvu zamaseli (amangqamuzana egazi abomvu), kukho iiseli zegazi ezimhlophe (iiseli zegazi ezimhlophe), oko kuthetha ukuba ukukhulelwa komzimba kubonakala. Enyanisweni, ngaphambi kokuzalwa kunye neenyanga ezimbalwa emva kwayo, imizimba yomzimba yomzimba iya kukhusela imvumba.
Ukuphuhliswa kwentlungu ezili-12
Ekupheleni kwekota yokuqala, umntwana ulingana no-14 g, kwaye ukukhula kwawo ukusuka kwisithsaba ukuya kumsila ku-6-7 cm. Ingqondo ikhula ngokukhawuleza, iisistim kunye neesistim zakha. Ingane inokwenza i-grimace, ivule kwaye ivale umlomo wayo, igwebe, igubungele iminwe yakhe kunye neenzwane, idibanise kwaye ingabonakali izibonda zayo kunye ne-somersault kwi-uterus. Kuba umama ozayo, ukuvuthwa kwama-acrobatic kusekho buthathaka: ukuguqulwa kwe-fetus kwiiveki ezingama-12 kusekunzima kwaye kungabonakali. Kukho iingcamango ezingenakunqunyulwa: ngokuthinta isisu, isithelo siqhubela kuso, sinyana umunwe okanye isibindi, siphenduka ekukhanyeni okukhanyayo.
Ngeli xesha le nto umntwana unokukwazi ukwahlula ukunambitha, ukugwinya i-amniotic fluid. Ukuba umama wadla into enomsindo okanye emuncu, omncinci ubonisa indlela engenakunambitheka ngayo intlekele kuye: ukuphikisa ubuso bakhe, ubeka ulwimi, uzame ukugwinya njengancinci njengamanzi amniotic.
Ukongezelela, umntwana uqala ukwenza ukunyakaza okuphefumulayo. Kakade ke, ezi ziphefumlelwe ngokupheleleyo kunye nokuphumlelwa komzimba: umlomo ovakalayo uvaliwe kwaye i-amniotic fluid ayifaki kwimiphunga. Nangona kunjalo, isifuba somntwana sihlamba kwaye siwa-oku qeqesho lweentsholongwane zokuphefumula kuya kuhlala kude kube sekupheleni kokukhulelwa.
Yintoni ongayibona kwi-ultrasound kwiiveki eziyi-12?
Njengoko kuyaziwa, ukususela ngeveki le-12 bonke abafazi abasemgangathweni banikwa ukuhlolwa kwe-ultrasound yokuqala kokukhulelwa . Oku akukwenziwe ukwenzela ukuchonga ngesondo somntwana (iimpawu zesondo zangaphandle azibonakali kakhulu). Umsebenzi oyintloko wokufundwa ukukhupha ukungabikho kobunzima obuphuhlisayo bokuphuhliswa kunye ne-fetal pathologies.
Ukuqwalaselwa ngokukodwa kukunikezelwa:
- ubukhulu bomntwana kwiiveki ezili-12 (ngokuqhelekileyo umntwana usinda 14-19 g, ubude bayo buyi-7-8 cm, ubungakanani bentloko buyi-21 mm, kwaye ububanzi besifuba buyi-24 mm);
- Ubungakanani bendawo yekhola (akufanele ide ngaphezu kwe-3 mm, ngaphandle koko umngcipheko we-chromosomal unalimfuneko);
- ukuphuhliswa kwe-placenta (kubalulekile ukuba ungabandakanyi ukuguga kwangaphambili kwepentecenta kunye nezinye izifo);
- indawo yomntwana kwi-iveki ye-12 (kungenzeka ukuba indawo ephantsi ye-placental, kodwa, njengomthetho, kunye nexesha, i-placenta "ihambela" ukuya ngaphantsi kwesibeletho).