different between pregnancy vs pseudocyesis

English

From pregnant +? -cy.

pregnancy (countable and uncountable, plural pregnancies)

(countable) The condition of being pregnant.
- 2012, Caroline Davies, Duke and Duchess of Cambridge announce they are expecting first baby (in The Guardian, 3 December 2012)[1]
  News that the duchess is in the "very early stages" of pregnancy with the third-in-line to the throne was officially released after she was taken to the King Edward VII hospital in central London, suffering from hyperemesis gravidarun, very acute morning sickness.
The period of time this condition prevails.
(uncountable) The progression of stages from conception to birth.

pseudo- +? cyesis, from Latin pseudo- + Ancient Greek ?????? (kú?sis).

pseudocyesis (usually uncountable, plural pseudocyeses)

false pregnancy; the appearance of signs and symptoms associated with pregnancy when the person or animal is not pregnant

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