Contraceptive pills are very effective with lesser side effects and are well accepted by the female. They work by

  • A

    Inhibiting ovulation

  • B

    Inhibiting implantation

  • C

    They alter the quality of cervical mucus to prevent/retard the entry of sperms

  • D

    All of these

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What is the significance of progesterone-estrogen combination as a contraceptive measure ?

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$A$ : Lactational amenorrhoea is due to high level of prolactin.
$R$ : Prolactin stimulates the release of gonadotropins

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