Masabata khumi ndi awiri a mimba ndi tsiku lofunika kwambiri la mkazi, pakuti uwu ndiwo mapeto a trimester yoyamba. Panthawi imeneyi, placenta imapanga progesterone yokwanira, ndipo kutayika kwa mahomoni, thupi la chikasu limachepa. Panthawiyi, trimester yoyamba ikuyang'aniridwa (kuchokera masabata 11 mpaka 13 ndi masiku asanu ndi limodzi), kuti mudziwe gulu loopsya lachilendo chachromosomal, ndi ultrasound yoyamba mimba . Ultrasound pa masabata khumi ndi awiri a chiberekero, chitukuko cha fetus chimapereka molondola kwambiri, makamaka chiwonetsero.
Chiyeso chofunika, chomwe chiri ndi chimodzi mwazofunikira kwambiri, ndi CTE ya fetus pamasabata 12. Chizindikiro ichi chimagwiritsidwa ntchito kudziwa kukula kwa mwana wakhanda ndikuwerengera nthawi ya mimba mogwirizana ndi kulemera kwake. Pakati pa masabata 12 ndi pafupifupi 5.3 masentimita Ngati chithunzithunzi cha masiku oyambirira chikadutsa popanda zovuta, ndipo chimakula ndi 1 mm tsiku, ndiye kamwana kamene kamakhala ndi masabata 12 chimachepetsa kukula kwa 1.5-2 mm tsiku. Madokotala amalimbikitsa kuyesa CTE ya fetus pa masabata 11 kapena 12.
Izi ziyenera kukumbukira kuti kukula kwa coccygeal-parietal kukula kumadalira nthawi yokhala ndi mimba mpaka mkati mwa tsiku, kotero kulakwa kwakukulu ndi masiku atatu kapena anai. Kawirikawiri amatanthauza CTE ya embryo ndi 51 mm. Pang'onong'ono pang'ono, musadandaule - zowonongeka kuchokera pa 42 mpaka 59 mm ndizotheka.
Poyerekeza, timasonyeza CTE ya fetus pa masabata khumi ndi awiri: mtengo wamtengo wapatali ndi 42 mm, zopotozedwa zowonongeka ndi 34-50 mm. Poyerekeza zizindikirozi, mukhoza kuona kuti tsiku lililonse ndilofunika kwambiri kwa ultrasound.
Embryo milungu 12
Kwa amayi amtsogolo izi ndi zosangalatsa momwe zimawonekera ndi zomwe chipatso chikhoza kuchita mu masabata khumi ndi awiri. Panthawi ya ultrasound, mayi amatha kuona momwe mwana wake akuyamwira chala chake, ndikumva kugunda 110-160 pa miniti kumenya mtima waung'ono. Mwanayo amasuntha ndi kutembenukira m'chikhodzodzo cha fetus, chifuwa chimatsika ndikukwera panthawi yopuma. Komanso, chipatsochi chili ndi mphamvu yakugwedeza, kutsegula pakamwa pako ndikugwedeza zala zako.
Ponena za zizindikiro za chitukuko, tiyenera kuzindikira kusasitsa kwa thymus gland, yomwe imayambitsa kupanga ma lymphocytes ndi thupi komanso kukula kwa chitetezo. Nthenda yamatenda imayamba kupanga mahomoni omwe amakhudza kukula kwa fetus, thupi la thupi komanso thupi labwino. Chiwindi cha embryo chimayamba kubala bile, chomwe chidzakuthandizani mu chimbudzi cha chakudya. Ndondomeko yamagetsi ikukonzekera kukumba shuga.
Mphungu imakula pafupifupi 9-13 magalamu kwa masabata khumi ndi awiri, chipatso chimatuluka ndikukhala pomwepo. Kutalika kuchokera korona kupita ku sacrum ndi pafupifupi 70-90 mm. Mtima wa pathupi pa nthawiyi uli ndi zipinda zinayi: ma atria awiri ndi zitsulo ziwiri, ndipo nthawi zambiri zimakhala zosiyana pakati pa 150 ndi 160 kugunda kwa mphindi. Miyamba ya mfupa imayamba kupanga, mano a mkaka, ndi m'kamwa, timagwiritsa ntchito zingwe zamtundu.
Nthawi imeneyi ya chitukuko kwa anyamata ndi yofunika kwambiri. Pochita ntchito yogwira ntchito ya testosterone, yomwe imatulutsidwa ndi zovuta za kugonana kwa anyamata, ziwalo zoberekera zakunja zimayamba kupanga - mbolo ndi phokoso. Ngati akuphwanya ntchitoyi, hermaphroditism ikhoza kuwonetsedwa.
Kodi amayi amamva bwanji pa masabata 12 a mimba?
Pa nthawi yomwe ali ndi mimba komanso kukula kwa mwana, mayi wodwala ayenera kupindula kuchokera pa 1.8 mpaka 3.6 makilogalamu. Mlingo wa kulemera kwalemera ndi pakati pa 300 ndi 400 magalamu pa sabata. Mukamalemba zolemera kwambiri, muyenera kuchepetsa chiwerengero cha zakudya zopatsa pake (maswiti, makeke, halva, etc.).
Amayi ambiri amada nkhaŵa za maonekedwe a mawangawa pamaso, pamutu, pachifuwa, komanso pooneka ngati mzere wandiweyani wochokera ku phokoso kupita ku pubis. Komabe, simuyenera kudandaula, izi ndizowonekera, ndipo posachedwapa adzabadwanso.
Mphungu pa masabata 12 yapambana moyo wa embryonic ndipo patapita milungu 12 imatchedwa mwana. Mu nkhani yathu, mayi wamtsogolo adzapeza zambiri zothandiza kwa iyemwini, kuti adziwe bwino za mwana wake wam'tsogolo.