Final answer:
The stable/unruptured treatment approach for an ectopic pregnancy < 3.5 cm in diameter with no cardiac issues involves in vivo fertilization or ligation of the fallopian tubes surgically to seal the tubes. Methotrexate can be used in early ectopic pregnancies, and surgical repair is needed if the uterine tube is already ruptured. In vitro fertilization or surgical removal of the obstruction and re-ligation of the fallopian tubes is also an option.
Step-by-step explanation:
The stable/unruptured treatment approach for an ectopic pregnancy < 3.5 cm in diameter with no cardiac issues is to opt for in vivo fertilization or ligation of the fallopian tubes surgically so that the tubes are sealed. Approximately one half of tubal pregnancies resolve spontaneously. In cases where medical intervention is necessary, the embryo's development can be arrested using the drug methotrexate if the ectopic pregnancy is detected early.
However if diagnosis is late and the uterine tube is already ruptured surgical repair is essential. Opting for in vitro fertilization or removal of the obstruction surgically and then re-ligation of the ends of the fallopian tubes is another treatment approach for an ectopic pregnancy.