title: Twin pregnancy suspected before implantation.
abstract: A case is reported in which the diagnosis of twin pregnancy was suspected by the appearance of 2 follicles on ultrasound examination and by high levels of plasma estradiol and progesterone.
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D010061:Ovulation Detection / Q000379:methods; D011247:Pregnancy; D011258:Pregnancy Tests / Q000379:methods; D011272:Pregnancy, Multiple; D014427:Twins; D014463:Ultrasonography