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In females it's target tissue is the [[Corpus_Luteum_Regression_-_Anatomy_%26_Physiology|corpus luteum]] and the oviduct where it helps induce ovulation and the secretion of progesterone from the corpus luteum. PGE<sub>2</sub> also plays an important role during labour where it aids the softening of the cervix and aids stimulation of uterine contractions.
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In females it's target tissue is the cervix (it is a potent cervical dilator), [[Corpus_Luteum_Regression_-_Anatomy_%26_Physiology|corpus luteum]] and the oviduct where it helps induce ovulation and the secretion of progesterone from the corpus luteum. PGE<sub>2</sub> also plays an important role during labour where it aids the softening of the cervix in animals with a soft-type cervix(equine and human) and aids stimulation of uterine contractions. It can thus be used to prepare the tract for parturition.
    
===Human Chorionic Gonadotrophin (hCG)===
 
===Human Chorionic Gonadotrophin (hCG)===