The fibroid is a tumor that is very frequently encountered in the uterus on both clinical examinations as well as on routine pelvic sonography.
One of the problems with sonography of the early pregnancy is the inability to clearly determine if the gestation sac is intrauterine or extrauterine (ectopic) in nature. This task is even more complicated by the controversies arising from whether the “sac” seen is a true sac or a pseudosac of ectopic pregnancy.
When a graafian follicle ruptures to release an oocyte, it is transformed into a corpus luteum. The corpus luteum is lined by a layer of granulose cells which rapidly become vascularized; some of these thin-walled vessels can rupture. This causes bleeding into the corpus luteum, resulting in the formation of a hemorrhagic cyst of the ovary.