Final answer:
The correct treatment for an ectopic pregnancy, which is suggested by a mass in the adnexa and the absence of an intrauterine pregnancy, is IM methotrexate. This medication helps to absorb the ectopic pregnancy without surgery. Contraceptive methods are not used to treat ectopic pregnancies.
Step-by-step explanation:
A transvaginal ultrasound examination that reveals a mass in the adnexa and no evidence of an intrauterine pregnancy may suggest an ectopic pregnancy, where the embryo implants outside the uterus. In cases where the mass is not causing severe symptoms and the tube has not ruptured, the most appropriate treatment is usually IM methotrexate, an option that helps absorb the pregnancy without the need for surgery.
Methotrexate is a chemotherapy agent that stops rapidly dividing cells, such as those in an ectopic pregnancy. It is important to note that contraceptive methods like combined oral contraceptives, progestin-only pills, or intramuscular medroxyprogesterone acetate are not appropriate treatments for an ectopic pregnancy. Hormonal methods are typically used for contraception or treatment of hormonal imbalances, not for an ectopic pregnancy.