Discuss the mode of action and advantages/disadvantages of hormonal contraceptives.

(D) Hormonal contraceptives function primarily by altering the hormonal balance in the female body to prevent pregnancy.
Mode of Action:
$1$. Hormone-releasing $IUDs$ (e.g.,$Progestasert$,$LNG-20$) make the uterus unsuitable for implantation and the cervix hostile to sperm.
$2$. Progestogens or progestogen-estrogen combinations (as pills,injections,or implants) inhibit ovulation and thicken cervical mucus,preventing sperm entry.
Advantages:
$1$. Highly effective for birth control.
$2$. Emergency contraception: $IUDs$ or hormonal pills used within $72$ hours of unprotected intercourse can prevent pregnancy.
Disadvantages:
$1$. Side effects: May cause nausea,mood swings,or weight gain.
$2$. Tissue damage: Improper insertion of $IUDs$ can cause uterine perforation or bleeding.
$3$. Hormonal imbalance: Long-term use may disrupt the natural endocrine cycle,potentially leading to temporary infertility or menstrual irregularities.
$4$. Allergic reactions: Some individuals may experience sensitivity to the materials or hormones used.