A 35-year-old pregnant female is experiencing vaginal spotting and abdominal pain. What should you do based on her symptoms?

When a pregnant female presents with symptoms such as vaginal spotting and abdominal pain, it's crucial to take her condition seriously, as these symptoms can indicate potential complications, such as a miscarriage or placental abruption. Administering high-concentration oxygen and preparing for immediate transport is the most appropriate initial action in this scenario. This approach is justified because it helps to ensure that both the mother and the fetus are receiving adequate oxygenation during a possibly unstable medical situation.

The urgency of immediate transport becomes even more vital with any signs of pregnancy complications, where maternal and fetal monitoring may be required. This decision prioritizes the safety of both the mother and the unborn child, ensuring they receive medical attention as quickly as possible.

In contrast, other options such as providing reassurance, merely monitoring the symptoms, or encouraging rest and fluid intake may not address the potential severity of the situation adequately. Those options can lead to dangerous delays in treatment that could compromise the health of both the mother and the fetus.