What is the most likely diagnosis for a 30-year-old female presenting with vaginal bleeding, sharp pelvic pain, and a left adnexal mass?

The presentation of vaginal bleeding, sharp pelvic pain, and a left adnexal mass is highly indicative of an ectopic pregnancy. An ectopic pregnancy occurs when a fertilized egg implants outside the uterus, often in a fallopian tube. The symptoms align closely with this diagnosis:

• Vaginal bleeding is common as the ectopic tissue can cause bleeding when it disrupts surrounding structures.

• Sharp pelvic pain often arises from the growing mass or if the ectopic pregnancy ruptures, leading to acute pain and possibly internal bleeding.

• The presence of a left adnexal mass suggests that the ectopic tissue is located in that area, which can be diagnosed through imaging such as an ultrasound.

In contrast, placenta abruptio typically presents in a pregnant woman with abdominal pain and bleeding but is not characterized by an adnexal mass. Pelvic inflammatory disease (PID) can cause pelvic pain and irregular bleeding but is less likely to present with a discrete adnexal mass compared to an ectopic pregnancy. A ruptured ovarian cyst can cause acute pelvic pain and sometimes bleeding, but it usually presents with a more widespread, less localized pain, and may not produce a clear adnexal mass on examination or imaging.

Overall, the combination of symptoms in