The best replacement for placenta is umbilical cord.

The best alternatives to placenta are rated as following:
★★★★★  umbilical cord
★★★★  glutathione
★★★★  collagen
★★★  amniotic sac
★★  placenta previa
★  afterbirth
★  blood clot
★  after birth
★  deer placenta
★  yolk sac
★  stem cell
★  sheep placenta
★  amniotic sack
★  posterior placenta
  amniotic egg
  sac
  cord blood
  chorion
  uterus
  animal placenta
  pre via
  baby heartbeat
  heartbeat

Your alternative for placenta is not listed? Suggest!
Speaking about placenta, one probably shouldn't forget about twins.

Other search terms related to placenta and their ratings are:
★★★★★ twins
★★★ fetus
★ previa
umbilical cord
glutathione
c-section
You have in mind a companion for placenta and it is not yet here? Propose!



Google Trends

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placenta
umbilical cord
glutathione