Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the mypractis domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /var/www/vhosts/minimallyinvasivegynecology.com/httpdocs/wp-includes/functions.php on line 6260

Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the wordpress-seo domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /var/www/vhosts/minimallyinvasivegynecology.com/httpdocs/wp-includes/functions.php on line 6260

Notice: Function _load_textdomain_just_in_time was called incorrectly. Translation loading for the jetpack domain was triggered too early. This is usually an indicator for some code in the plugin or theme running too early. Translations should be loaded at the init action or later. Please see Debugging in WordPress for more information. (This message was added in version 6.7.0.) in /var/www/vhosts/minimallyinvasivegynecology.com/httpdocs/wp-includes/functions.php on line 6260
Functional ovarian cyst Michael L. Nimaroff, M.D. - North Shore University Hospital OB-GYN Associates

Make an Appointment516.472.5700

Health Library

Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Functional ovarian cyst

A functional ovarian cyst is a fluid-filled sac that forms on the ovary. A sac normally forms during ovulation to hold a maturing egg. Usually, the sac goes away after the egg is released. But if a mature egg is not released or if the sac reseals after releasing the egg, the sac can swell up with fluid. This forms a functional ovarian cyst.

Most of these cysts do not cause symptoms and they go away by themselves. Some cause mild pain. Others can cause severe pain when they rupture or bleed.

Current as of: May 1, 2026

Author: WebMD Ignite Staff
Clinical Review Board
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

Current as of: May 1, 2026

Author: WebMD Ignite Staff

Clinical Review Board
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.