Nchụpụ nke ịbịaru mgbe ọ bụ bụ nke ikpeazụ nke ọmụmụ ọmụmụ. Na otú ngwa ngwa na "qualitatively" ọmụmụ nke placenta na membranes ga-ewere ọnọdụ, ahụike nke nwanyi ahụ na mkpa nhicha mgbe a mụsịrị nwa na- adabere.
A na-ekekarị onye nke ọzọ wee mụọ ya n'ime nkeji iri atọ mgbe nwa ahụ gasịrị. Mgbe ụfọdụ, usoro a na-egbu oge ruo awa 1-2. N'okwu a, obstetrician na-ekpebi ihe ịrịba ama nke ịhapụ oge ịbịara.
Ihe ịrịba ama kachasị mkpa nke nkewa bụ:
- Ihe ịrịba ama Schroeder. Mgbe a mụsịrị nwa ahụ, akpanwa na-agba gburugburu ma dị n'etiti etiti ahụ, ala ya dị na ọkwa. Mgbe nkewa, akpanwa etinyere na nkwekọrịta, a kọwaala ala ya n'elu okpokoro ahụ, mgbe mgbe ọ na-ewepụ aka nri.
- Ama nke Dovzhenko. Ọ bụrụ na placenta kewapụrụ onwe ya, mgbe ahụ na-enwe ume miri emi, ụdọ eriri ụdọ adịghị adọta n'ime ikpu.
- Akara nke Alfeld. Kewapụ, placenta na-agbada n'ime akụkụ ala nke akpanwa ma ọ bụ n'ime ikpu. N'okwu a, a na-eji 10-12 cm kwatuo mpempe aka na eriri ụbụrụ.
- Ihe mgbaàmà nke Klein. Nwanyị ahụ na-echegbu onwe ya. Pacenta kewapụrụ site na mgbidi uterine, ma ọ bụrụ na njedebe nke mgbalụ ahụ na-adọtaghị n'ime ikpu.
- Ihe ịrịba ama nke Kyustner-Chukalov. A na-etinye ọnyá nke nkwụ megide akpanwa n'elu pubis, ma ọ bụrụ na ejighi eriri ụbụrụ na-abanye n'ime eriri ọmụmụ, a na-ekepụ placenta.
- Ihe ngosi nke Mikulich-Radetsky. Ikewapụ site na mgbidi ahụ, nke ikpeazụ ga-abanye n'ime ebe a mụrụ nwa, n'oge a, enwere ike ịmalite itinye nrụgide.
- Nbanye nke Hohenbichler. Ọ bụrụ na placenta adịghị kewapụ, ya na contractions nke akpanwa, eriri eriri eriri nke si na ikpu nwere ike ịtụgharị gburugburu ya, ebe ọ bụ na eriri umbilical jupụtara n'ọbara.
A na-achọpụta akara ngosi nke placenta site na akara ngosi 2-3. Ihe kachasi ike bụ Alfeld, Schroeder na Kyustner-Chukalov. Ọ bụrụ na e kewapụrụ ya, a na-enye nne ya ọrụ. Dị ka a na-achị, nke a zuru oke maka ọmụmụ nke placenta na membranes.
Mgbe oge na-egbu oge, ọ dịghị ihe ịrịba ama nke nkewa ya, nke na-agbapụta ya na mpụga ahụ, nhazi akwụkwọ nke ịbịaru oge.