Oral contraceptive pills work by stopping

Correct option is B

The correct answer is indeed (B) ovulation and fertilization.

Explanation:

Oral contraceptive pills primarily prevent pregnancy by targeting both ovulation and fertilization through the following mechanisms:

1. Stopping Ovulation:
• The synthetic hormones in the pill (estrogen and/or progestin) suppress the release of FSH and LH, which are necessary for ovulation.
• Without ovulation, no egg is released for fertilization.
2. Preventing Fertilization:
• Oral contraceptives thicken the cervical mucus, making it difficult for sperm to travel and reach the egg.
• This significantly reduces the chances of fertilization.

Why Other Options Are Incorrect:

• Ovulation: Partially correct, but oral contraceptives also inhibit fertilization by altering cervical mucus.
• Fertilisation and Implantation: Incorrect, as ovulation is also actively prevented.
• Ovulation and Implantation: Incorrect, as implantation is not a primary focus of oral contraceptive pills.