Which of the following present similar to unruptured ectopic pregnancy
Follicular cyst of ovary
Corpus luteum cyst
Polycystic ovary disease
Ovarian torsion
Halban's classical traid:

Delay in normal period followed by spotting
Unilateral pelvic pain 
Small Tender adnexal mass.

This triad is similar to that seen in classic ectopic pregnancy.