Ukuru hwemucheche zvakanyanya kunotsamira pakuita kuti kuendeswa kuchaitika sei, saka kuverenga kuyerwa kwema fetus kune vamwe vanaamai munguva yemberi inova inonyanya kukoshesa. Vachizvidzivirira-gynecologists vanoshandisa mazano akasiyana-siyana anokubvumira kuti uverenge kuyerwa kwechiyero che fetus kubva kumavhiki makumi maviri nemaviri . Izvo zvinofanira kuonekwa kuti nhamba yehuwandu hwakadaro haina kuenzana, sezvo inotenderera pane zvakasiyana-siyana zvezvinhu, kusanganisira maitiro eatomical maamai, chiyero che amniotic fluid, nzvimbo ye fetus mubereki, nezvimwe zvakadaro.
Maitiro ekugadzirisa uremu:
- OZH x VDM
Muchirevo ichi, hutsika hukuru ndedumbu remuviri uye kukwirira kwehumi hwe uterine fundus. Semuenzaniso, kana pamasvondo makumi maviri nemasere mimba yepamu inenge masendimita 84 uye chikamu chechipiri chika 32 cm, ipapo kukosha kwema fetus ndeye 2688. Zvakakosha kudzokororazve zvakare kuti migumisiro yezviyero izvi ndeyekuti, uye kukanganisa kunokwanisa kusvika kusvika 200-300 g.
- (OZH + VDM) / 4 x 100
Iyi shanduro inokubvumirawo kuti uverenge uremu hwe fetus panguva yekuzvitakura. Nokuda kweizvi, zviratidzo zviviri (mimba dzomukati uye kukwirira kwehumi hwemuviri pasi) zvinofanira kuiswa, zvakakamurwa nevana uye zvinowanikwa nezana. Nokudaro, nokuda kwezvikamu zvepamuviri, uremu hwemucheche uchava 2900 g.
- (VDM - 12 kana 11) x 155
Chirongwa chechitatu chinoratidza kuti ungaverenga sei kuwanda kwehutachiwana hwomukomana, uchifunga nezvezvinhu zvemuviri wemukadzi. Maererano neshoko raSolovyov, imwe nhamba inodzingwa kubva pakiratidziro yekumira kwakakwirira kwechibereko chechibereko (12 - kana rutivi rwemudzimai wechikadzi rwuri kupfuura 12 cm, 11 - kana rishoma), uye ipapo nhamba inowanikwa ne 155. Somugumisiro, pamuenzaniso uyu uremu hwemucheche huchava 3100 kana 3255 gramu zvichienderana nehutano hwemuviri wemangwana amai.
Kusarudza kwekurema kwe fetus ne ultrasound
Nyaya yakarurama kupfuura dzose inogona kuwanikwa kana tikaverenga kuyerwa kwe fetus ne ultrasound. Ultrasound kuongororwa inokubvumira kuti usarudze kwete uremu hwemwana chete, asi mutsamba wehukuru hwomunhu mumwe nomumwe kusvika pakubata pamuviri. Kuti averenge kuyerwa kwema fetus kwemavhiki , kune chiyeuchidzo chakakosha. Kana iwe ukapinda dhidha rose data, unogona kuwana mugumisiro uri pedyo neicho chaihwo.
Mushure mekuverenga nemhando dzakasiyana uye nekufungisisa mitsva ye ultrasound, unogona kuverenga uremu hwakakwana hwemucheche pakuzvarwa. Zvakakosha kuyeuka kuti chimiro chega chega chiri chega, saka kana zvikasa zvakakwirira kana kuti zvishoma kudarika zvinowanzoitika, zvinotanga kusvika pakuvhunduka. Sezvo mutemo, mitemo inogona kunyatsoshandiswa chete kwehafu yekutanga yekuzvitakura, apo fetus isati iri duku, asi mugore rechitatu mhosho inogona kusvika 500 g.