single-dose methotrexate 50 mg/m² im is recommended with β‑hcg monitoring on days 4 and 7. lower dose (a) is n

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Hard"Immediate laparotomy"For appropriate candidatessingle-dose methotrexate 50 mg/m² im is recommended with β‑hcg monitoring on days 4 and 7. lower dose (a) is not standard. multi‑day regimens (c) are alternatives but with more toxicity. expectant management (d) is not appropriate with current levels and mass. surgery (e) is for contraindications or instability."

A 28-year-old G2P0 at 7 weeks with confirmed tubal ectopic pregnancy (mass 2.5 cm, β‑hCG 200 mIU/mL) is stable and reliable for follow-up. Preferred medical regimen?

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