Mention any two events that are inhibited by the intake of contraceptive pills to prevent pregnancy in humans. 

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Inhibition of Pregnancy: Effects of Contraceptive Pills

1. Introduction to Contraceptive Pills

• Contraceptive pills, commonly known as birth control pills, are hormonal medications designed to prevent pregnancy by inhibiting certain reproductive processes.

2. Events Inhibited by Contraceptive Pills

• Ovulation:

  • Contraceptive pills contain hormones such as estrogen and progestin that suppress the release of eggs from the ovaries.
  • This inhibition of ovulation is a key mechanism in preventing the availability of eggs for fertilization.

• Thickening of Cervical Mucus:

  • Contraceptive pills alter the consistency of cervical mucus, making it thicker.
  • Thicker cervical mucus forms a barrier that hinders the movement of sperm, reducing the likelihood of successful fertilization.

Understanding the Mechanism

1. Suppression of Ovulation

• Preventing Egg Release:
  • Contraceptive pills simulate a state of pregnancy in the body, signaling that ovulation is unnecessary.
  • This prevents the monthly release of eggs, a crucial event for successful conception.

2. Modification of Cervical Mucus

• Creating a Barrier:
  • Contraceptive pills alter the composition of cervical mucus, making it more difficult for sperm to traverse through the cervix.
  • The modification acts as a physical barrier, further preventing the union of sperm and egg.

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