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| format = pdf
| accessdate = 17 Mei 2010
}}</ref> Hormon [[steroid]] paling penting yang diproduksi plasenta adalah [[estrogen]] dan [[progesteron]] yang konsentrasinya meningkat selama kehamilan.<ref>{{en}}{{cite journal
| last = Shanker
| first = Y.Gopi
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== Struktur ==
[[Berkas:Plazenta.png|thumb|250px|right|Gambar skematis plasenta]]
Plasenta manusia memiliki [[diameter]] rata-rata 22 [[cm]], berat rata-rata 470 [[gram]], dan rata-rata tebal (pada bagian tengah plasenta) 2,5 [[cm]].<ref>{{en}}{{cite web
| last = YETTER III
| first = JOSEPH F.
| authorlink =
| coauthors =
| year = 1 Maret 2008
| url = http://www.aafp.org/afp/980301ap/yetter.html
| title = Examination of the Placenta
| format = html
| work =
| publisher = The American Academy of Family Physician
| accessdate = 18 Mei 2010
| accessyear =
| archiveurl =
| archivedate =
| quote =
}}</ref>
<ref>{{en}}{{cite book
|last= Benirschke
|first= Kurt
|authorlink=
|coauthors= Kaufmann, Peter; Baerger, Rebecca
|title= Pathology of the Human Placenta
|year= 2006
|publisher= Springer
|location=
|id=
|page= 13
}}</ref>
== Lihat pula ==
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