The regimen(s) used for postcoital emergency contraception is/are:

Correct Answer: B

Rationale: Rationale: Levonorgestrel is the recommended emergency contraceptive. Choice A includes ethinylestradiol, which is not needed. Choice C uses Mifepristone, which is not typically used for emergency contraception. Choice D is incorrect because it includes options A and C, which are not recommended. Choice B, Levonorgestrel 0.75 mg taken twice 12 hours apart, is the correct regimen as per guidelines. It provides effective protection against unintended pregnancy without the need for additional unnecessary components.

Correct Answer: C

Rationale: The correct answer is C: First term abortion. Mifepristone is primarily indicated for medical abortion in the first trimester of pregnancy. It works by blocking the hormone progesterone, leading to the detachment of the embryo from the uterine wall. Endometriosis (A) is not a primary indication for mifepristone. Cushing's syndrome (B) is typically treated with medications that lower cortisol levels, not mifepristone. Second term abortion (D) is usually performed through other methods like dilation and curettage, not with mifepristone.

Correct Answer: B

Rationale: The correct answer is B: Dysfunctional uterine bleeding. Progestins are used alone for this indication to help regulate the menstrual cycle without the need for estrogen. In dysfunctional uterine bleeding, the endometrium sheds irregularly due to hormonal imbalances. Progestins can help stabilize the endometrium and control bleeding. A: Threatened abortion - Progestins are not typically used alone for this indication as estrogen may also be needed to support the pregnancy. C: Hormone replacement therapy - Progestins are usually combined with estrogen in hormone replacement therapy to protect the uterine lining. D: Premenstrual tension - Progestins alone are not commonly used for this condition, as estrogen may also play a role in managing premenstrual symptoms.

Correct Answer: C

Rationale: The correct answer is C: Carcinoma breast. Tamoxifen citrate is primarily indicated for the treatment of breast cancer. It is a selective estrogen receptor modulator that helps block the effects of estrogen on breast tissue. This is effective in hormone-receptor-positive breast cancer, helping to reduce the risk of recurrence and improve survival rates. A: Female infertility - Tamoxifen is not indicated for female infertility and can actually cause birth defects. B: Endometrial carcinoma - Tamoxifen use is associated with an increased risk of developing endometrial carcinoma. D: Endometriosis - Tamoxifen is not indicated for the treatment of endometriosis and may worsen the condition. Therefore, the correct answer is C as it aligns with the established use of tamoxifen citrate in the treatment of breast cancer.

Correct Answer: B

Rationale: The correct answer is B: Stimulate FSH and LH release. Progestins act to inhibit FSH and LH release from the pituitary gland, thus preventing ovulation. Progestins also help prevent uterine contractions, maintain the secretory endometrium, and block ovulation. Therefore, stimulating FSH and LH release would be contradictory to the main function of progestins, making it the incorrect choice.