Relaxin (RLN)
Source: It is produced from CL (major source) during pregnancy and important at parturition. It is also in some species from the placenta and uterus.

Functions of relaxin

  • It causes the relaxation of the cervix and vagina at the time of parturition.
  • It affects symphysis pubis.
  • In guinea pigs, it causes the dissolution of symphysis pubis; separation of the symphysis pubis.
  • It causes the relaxation of the birth canal.
  • Parturition is impossible without RLN.

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