Ovarian Cyst Types: Hemorrhagic Cyst vs Simple Cyst vs Corpus Luteum Cyst
You have an ultrasound report that says “ovarian cyst,” and then comes a confusing word next to it: simple, hemorrhagic, corpus luteum. Is one worse than the others? Will it go away? Does it affect your chances of getti…
Samarth IVF team
Updated 23 Oct 2026 8 min read
You have an ultrasound report that says “ovarian cyst,” and then comes a confusing word next to it: simple, hemorrhagic, corpus luteum. Is one worse than the others? Will it go away? Does it affect your chances of getting pregnant? Here is what these three terms mean, how they differ, and how to read your own report with less worry.
What Is an Ovarian Cyst?
The Reassuring Basics
An ovarian cyst is a fluid-filled sac on or inside an ovary. Most are functional cysts, which form as a normal part of the monthly cycle. They are common, usually harmless, and most disappear by themselves within a few cycles. The three types in your report are all functional, or closely related to them.
The Difference at a Glance
| Type | What it is | How it looks on ultrasound | What usually happens |
|---|---|---|---|
| Simple cyst | A thin-walled sac filled with clear fluid | Smooth thin wall, completely clear inside, no solid parts | Often painless. Usually disappears in a few cycles; larger ones are rechecked |
| Corpus luteum cyst | A cyst that forms from the follicle after the egg is released | Thicker wall, may have some internal echoes, ring of blood flow around it | Seen after ovulation or in early pregnancy. Usually resolves on its own in weeks |
| Hemorrhagic cyst | A functional cyst that has bled inside, often a corpus luteum cyst | Lace-like or web-like pattern, or a clot with no blood flow inside it | May cause sudden one-sided pain. Usually shrinks within weeks; rarely ruptures |
General descriptions only. Your own report and your doctor's examination are what count.
Simple Cyst
"Simple" is an ultrasound word, not a diagnosis. It means the cyst looks uncomplicated: a thin wall, clear fluid, and nothing solid inside. Many simple cysts are follicles that grew a little larger than usual and didn't release an egg. Small simple cysts usually need no treatment at all, and a repeat scan is often enough to confirm that they've gone. Simple cysts are very rarely a cause for concern in women who still have periods.
Corpus Luteum Cyst
After an egg is released, the empty follicle turns into a temporary gland called the corpus luteum, which makes progesterone. Normally it shrinks after about two weeks if there is no pregnancy. Sometimes it fills with fluid and becomes a cyst. This is why corpus luteum cysts show up in the second half of the cycle, and in early pregnancy, when the corpus luteum is supporting the pregnancy until the placenta takes over. They are also common after ovulation induction and IVF cycles. Most are harmless and disappear on their own.
Hemorrhagic Cyst
A hemorrhagic cyst is a functional cyst with bleeding inside it, most often a corpus luteum cyst. The blood gives it that lace-like, web-like or clot-filled look on ultrasound. Many cause no symptoms, but some cause sudden pain on one side of the lower abdomen, which can be sharp. They usually shrink and resolve by themselves, and a follow-up scan after several weeks confirms it. Rarely, a hemorrhagic cyst can rupture and bleed into the abdomen, or the ovary can twist (torsion), which needs urgent care.
Reading Your Report: Other Terms You May See
- Complex cyst. — A cyst with solid or thick parts. It needs a closer look, but many complex cysts are still benign, including hemorrhagic cysts.
- Size. — Reported in centimetres. Larger cysts are watched more closely, and the risk of twisting or rupture rises with size.
- O-RADS score. — Some reports add a risk category. Low scores (1 and 2) mean the cyst is almost certainly benign.
- Polycystic ovaries. — This is not a cyst at all. It describes many small follicles, usually linked to PCOS.
Cysts That Behave Differently
Not every cyst is functional. These types don't usually disappear on their own and are managed differently:
Endometrioma
endometriosis and fertility
.
A "chocolate" cyst linked to endometriosis. It can affect fertility. See
Dermoid cyst
A cyst containing tissue such as fat or hair. It is usually benign but does not go away without treatment.
Cystadenoma
A cyst that grows from the surface cells of the ovary. It can become large and may need removal.
Complex or suspicious cyst
One with solid areas, thick walls or internal blood flow. It needs specialist assessment.
Symptoms to Know About
Most cysts cause no symptoms and are found by chance. When they do, you may notice:
- A dull ache, heaviness or bloating in the lower abdomen.
- Pain on one side, sometimes sudden and sharp.
- Pain during intercourse or bowel movements.
- Irregular periods or spotting.
Seek urgent care for sudden severe abdominal pain, pain with fever or vomiting, dizziness or fainting, or pale, clammy skin. These can be signs of rupture or torsion.
How Are Ovarian Cysts Managed?
- Watch and wait — Most functional cysts are simply monitored. A repeat ultrasound after a few weeks, or after your next period, confirms whether the cyst has gone.
- Pain relief — Your doctor can advise on safe options for discomfort.
- Hormonal medicines — Sometimes used to prevent new functional cysts forming, though they don't shrink an existing one.
- Surgery — Usually keyhole surgery, reserved for cysts that are large, persistent, suspicious, causing torsion, or bleeding significantly. The aim is to preserve healthy ovarian tissue wherever possible.
Avoid "cyst-dissolving" powders, herbs and online remedies. There is no reliable evidence that they work, and they can delay proper care.
Do Ovarian Cysts Affect Fertility or Pregnancy?
Functional cysts, whether simple, corpus luteum or hemorrhagic, don't usually affect fertility, and they often occur in women who conceive easily. A corpus luteum cyst in early pregnancy is common and usually harmless. Cysts linked to endometriosis, or very large or repeated cysts, may matter more.
If you are having fertility treatment, a cyst found on your baseline scan may delay the start of a cycle, because some cysts produce hormones. Your doctor will decide whether to wait for it to settle or to treat it. See OHSS for why ovaries are monitored during stimulation, and how female infertility is diagnosed . If egg reserve is a worry, see ovarian reserve testing explained .
Questions to Ask Your Doctor
- Which type of cyst do I have, and what size is it?
- Does it look benign, and does my report include a risk score?
- When should I have a repeat scan?
- Is there anything I should avoid, such as strenuous exercise?
- Does it affect my plans to conceive, or my treatment plan?
- Which symptoms should make me come back straight away?
Common Myths About Ovarian Cysts
| Instead of | Try |
|---|---|
| Assuming every ovarian cyst is dangerous or is cancer. | Knowing that most cysts in women who still have periods are functional and benign, and resolve on their own. |
| Believing cysts always need surgery. | Remembering that most are only monitored. Surgery is for specific situations. |
| Thinking "hemorrhagic" means a bleeding disorder or something serious. | Understanding that it simply means there is some blood inside the cyst, which usually settles by itself. |
| Confusing PCOS with ovarian cysts. | Knowing that polycystic ovaries have many small follicles, not true cysts, and PCOS is a hormonal condition. |
| Trying herbal powders or home remedies to dissolve a cyst. | Getting a proper scan and a doctor's advice. Most functional cysts settle without any remedy. |
The three words on your report sound alarming, but they are usually descriptions of a normal cycle at work. A clear scan, a follow-up and a conversation with your doctor are usually all that is needed.
Frequently Asked Questions
What is the difference between a hemorrhagic cyst and a simple cyst?
A simple cyst is a thin-walled sac of clear fluid with nothing inside it. A hemorrhagic cyst is a functional cyst that has bled inside, so on ultrasound it looks lace-like or contains a clot. Both usually resolve on their own.
Is a corpus luteum cyst dangerous?
Usually not. It forms from the follicle after ovulation and normally disappears within weeks. It is also common in early pregnancy. Rarely, it can bleed, rupture or cause the ovary to twist, which causes sudden severe pain and needs urgent care.
Do hemorrhagic cysts go away on their own?
Yes, most do. They typically shrink and disappear within several weeks, and a follow-up ultrasound confirms it. Larger or persistent cysts, or those causing severe pain, may need further assessment or treatment.
How long does a hemorrhagic cyst take to heal?
Most resolve within about six to twelve weeks, and a repeat scan after that time usually shows it has gone. Your doctor will advise the right timing for your follow-up.
Can an ovarian cyst affect pregnancy or fertility?
Functional cysts, such as simple, corpus luteum and hemorrhagic cysts, don’t usually affect fertility. Cysts linked to endometriosis, or very large or repeated cysts, can matter more and should be assessed by a specialist.
Can I have IVF if I have an ovarian cyst?
Often yes, but a cyst found before stimulation may delay the start of the cycle, because some cysts produce hormones. Your doctor will decide whether to wait for it to settle or to treat it first.
This article is for general education only and is not a substitute for a medical consultation. Suitability and response to any treatment vary between individuals.
