1. Most probable diagnosis is benign bilateral dermoid cysts (differential diagnosis: haemorrhagic corpus luteum, endometrioma and mucinous cystadenoma).
   
2. Complex ovarian masses that contain both cystic and solid components are mostly dermoid cysts. The cysts themselves are usually solitary, spherical or ovoid, and echogenic. They contain a solid area of hair and calcified material along with 'buttery' sebum which tends to layer anteriorly due to its lower specific gravity. Sonographic diagnosis of dermoid cysts has 84% sensitivity and 90% specificity.
   
3. ^{Infertility is caused by disturbance of ovulation.}
4. The best method for removing dermoid cysts is by laparoscopic ovarian cystectomy. Preservation of the ovary should be the aim of surgery and a thorough lavage of the peritoneal cavity is mandatory.
5. The prognosis for subsequent fertility is very good.

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