Dr. Shweta decided to add a progestin for 10-12 days each month to estrogen replacement therapy in menopausal women in the gynaecology OPD. Addition of progestin is recommended because the progestin:
**Core Concept**
In menopausal women, estrogen replacement therapy (ERT) can lead to endometrial hyperplasia and increased risk of endometrial cancer due to unopposed estrogen stimulation of the endometrium. Progestins are added to ERT to counteract this effect by providing progesterone-like activity.
**Why the Correct Answer is Right**
The addition of progestin in ERT is recommended to prevent endometrial hyperplasia and cancer by inhibiting the estrogen-induced growth of the endometrium. Progestins work by inducing a decidual reaction in the endometrium, which leads to shedding of the endometrial lining, thereby preventing its overgrowth. This is known as the "progestogenic effect" on the endometrium.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because progestins do not have a direct effect on the cardiovascular system, which is a major concern in ERT.
**Option B:** This option is incorrect because progestins do not have a direct effect on bone metabolism, which is another major concern in postmenopausal women.
**Option C:** This option is incorrect because progestins do not have a direct effect on the risk of breast cancer, which is a concern in ERT.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that the addition of progestin in ERT is recommended for women with an intact uterus to prevent endometrial hyperplasia and cancer. In women with a hysterectomy, progestin is not necessary.
**Correct Answer: C.**