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The chorionic villi receive blood from the embryo by and return it by .
(a)umbilical vein, umbilical artery
(b)renal vein, renal artery
(c)umbilical artery, umbilical vein
(d)coronary artery, coronary vein

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Important Questions on Human Reproduction
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Foetus is matured by secreting hormone.

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ACTH causes the release of corticosteroid hormone from of foetus.

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The foetal hormone accumulate in the mother's blood till they cause

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Reduced progesterone allows the secretion of hormone.

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Skin of newly born baby is blush pink in all human races because

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The first stage of parturition lasts for about

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The second stage (expulsion) of parturition lasts for about

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During second stage of parturition,
