List five sonographic findings that suggest ectopic pregnancy.

1. No intrauterine gestational sac
2. Complex or solid adnexal mass (representing the ectopic gestation)
3. Blood in the cul-de-sac (if the ectopic pregnancy has ruptured)
4. Tubal ring (a thick-walled cystic mass in the adnexa). If the sac contains a yolk sac or an embryo with cardiac activity, an ectopic pregnancy is definitely present.
5. Single layer of decidua in the endometrium (decidual reaction)