What are the stages of development of ovarian cancer?

According to FIGO classification:

Stage I - tumor limited to one or both ovaries
. IA - cancer involves one ovary, capsule intact, no tumor on ovarian surface, no malignant cells in ascites or peritoneal washings
. IB - involves both ovaries, capsule intact, no tumor on ovarian surface; washing and ascites negative
. IC - tumor limited to ovaries with any characteristic of the following: rupture of the capsule on the ovary surface, positive peritoneal washings
Stage II - pelvic extension or existence of implantation.
. IIA - extension on the uterus or fallopian tubes; negative washings
. IIB - extension to other pelvic structures; negative washings
. IIC - extension of the basin with positive peritoneal washings
Stage III - microscopic peritoneal implants outside the pelvis, or limited to the pelvis with extension into the small intestine or omentum
. IIIA - microscopic peritoneal metastases pelvis
. IIIB - macroscopic peritoneal metastases pelvis under 2 cm in size
. IIIC - peritoneal metastases pelvis> 2 cm or lymph node metastases (metastases, para-aortic lymph nodes are considered as regional lymph nodes)
Stage IV - metastatic to the liver or outside the peritoneal cavity.