Placental somatomammotropin (lactogen) inosunungurwa panguva yekudzivirira chete neparcenta. Madzimai asiri pamuviri nevarume, hapana hocental lactogen mumutambo. Iyi peptide hormone, yakafanana mukugadzirwa kweprolactin yemucheka wepituitary, asi yakawanda zvikuru. Pasi pemutungamiri waro, kusimwa nekugadzirisa kwemafupa emakumbo ekugadzirwa kwemukaka kunoitika. Uye, kufanana neprolactin, ine simba rinokurudzira pahutumbi hwemashizha. Pasi pesimba relactogen, inogadzira progesterone, iyo inochengetedza kuchengetedza pamuviri kusvikira masvondo makumi matanhatu.
Mumashoko akasiyana ekudzivirira, placenta inobereka racentiki yepenicental muzviyero zvakasiyana:
- inotanga kugadzirirwa kubva vhiki gumi;
- iyo yakawanda inosvika vhiki makumi matatu;
- kusvika masvondo makumi mana anoderera nekuda kwekukwegura kwepa placenta.
Muyero weparcental lactogen panguva yekuzvitakura kweimwe nguva inotsanangurwa nefurafura.
Iko inonzi placental lactogen testay yakaitwa sei?
Nokuda kwekudzidza pamusoro pepencental lactogen, ropa rinotorwa mangwanani, pane chisina chinhu, mudumbu remukadzi ane pamuviri, sezvo 90% yehuwandu hwayo inopinda muropa remukadzi uye 10% chete iri mu fetal fluid. Zviratidzo zvekuongorora:
- kuongororwa kwepentecenta panguva yekuzvitakura (pamwe neesterolol free);
- kuongororwa kwebladder skidding uye chorion carcinoma (inoderera mumwero weparcental lactogen pamatunhu akakwirira echorionic gonadotropin).
Mukana wekufa kwemucheche, pamuviri wakaneta, kuvhara kwemavara, kutora pamuviri, kubata pamuviri kwekurera mwana, kuchera pamuviri gestosis, kuderera mumwero weparticental lactogen kuchaonekwa. Uye kuwedzera kwayo kunogona kuitika kana paine mimba yakawanda , diabetes mellitus (ne thickened placenta), Rh-kupikisana kweamai uye fetus, fetal macrosomia, trophoblast tumor.