https://www.geneith.com/2019/12/ovarian-cyst-and-pregnancy-meaning.html
Every pregnant woman should have an ovarian cyst which is known as corpus luteum (cyst of pregnancy). It is this cyst that produces the hormone Progesterone. This hormone prevents miscarriage as it thickens the walls of the uterus in preparation to hold the fertilized egg.

Hence, without the corpus luteum, most pregnancies would end in miscarriages.

Ovarian cysts are fluid-filled sacs or pockets in an ovary and majority of them may also disappear without treatment within few months.

The ones that are usually associated with the hormonal imbalance during menstrual cycle are known as functional cysts and they occur in about one out of four women. Majority of ovarian cysts won’t affect your pregnancy at all.

For instance, when it comes to a corpus luteum cyst, chances are it will go away on its own.

Other types of cysts can continue to grow during pregnancy, and in some cases cause pain, but even in those cases, such cysts usually don’t cause problems for the pregnancy. Other types of ovarian cysts may include:

· Dermoid cysts. These can contain tissue, such as hair, skin or teeth, because they form from embryonic cells. They're rarely cancerous.
· Cystadenomas. These develop on the surface of an ovary and might be filled with a watery or a mucous material.
· Endometriomas. These develop as a result of a condition in which uterine endometrial cells grow outside your uterus. Some of the tissue can attach to your ovary and form a growth.

To be sure that an ovarian cyst doesn’t impact your pregnancy, and/or to monitor any existing cysts, your practitioner will schedule regular ultrasounds to keep an eye on your ovaries.
An ovarian cyst ultrasound will track the size and condition of any cyst to make sure it doesn’t grow or change in any way that may make it worrisome. Some women develop less common types of cysts that a doctor finds during a pelvic exam. Cystic ovarian masses that develop after menopause might be cancerous (malignant). That's why it's important to have regular pelvic exams.

Ovarian cysts usually does not produce any symptoms, however, some of the under listed symptoms may occur especially with large or ruptured cyst.
· Lower abdominal or pelvic pain. This may be intermittent, or can be severe, sudden, and sharp.

· Irregular menstrual periods

· Chronic pelvic pain or low back pain throughout the menstrual cycle

· Pain or pressure with urination or bowel movement
Some complications associated with ovarian cysts that are not common include:
· Ovarian torsion. Cysts that enlarge can cause the ovary to move, increasing the chance of painful twisting of your ovary (ovarian torsion). Symptoms can include an abrupt onset of severe pelvic pain, nausea and vomiting. Ovarian torsion can also decrease or stop blood flow to the ovaries.
· Rupture. A cyst that ruptures can cause severe pain and internal bleeding. The larger the cyst, the greater the risk of rupture. Vigorous activity that affects the pelvis, such as vaginal intercourse, also increases the risk.
Although there's no way to prevent ovarian cysts, regular pelvic examinations help ensure that changes in your ovaries are diagnosed as early as possible as this will ensure that the cyst does not affect the pregnancy negatively.
https://www.geneith.com/2019/12/ovarian-cyst-and-pregnancy-meaning.html