Most ovarian cysts don’t prevent pregnancy. The small, fluid-filled cysts that form during a normal menstrual cycle (called functional cysts) typically resolve on their own within one to three cycles and rarely interfere with conception. The cysts that do affect fertility fall into a few specific categories, and understanding which type you have is the single most important step toward getting pregnant.
Which Cysts Actually Affect Fertility
Your ovaries naturally produce small cyst-like structures every month as part of ovulation. These functional cysts, including follicular cysts and corpus luteum cysts, are part of the process that releases an egg. They almost always disappear without treatment and don’t require any intervention to conceive. Simple cysts under 6 cm carry less than a 1% risk of being anything concerning, and even larger simple cysts (up to 10 cm) that aren’t causing symptoms can be monitored with ultrasound since most resolve on their own.
The types that can interfere with getting pregnant include:
- PCOS-related cysts: Polycystic ovary syndrome affects 5 to 10% of women of reproductive age. The ovaries produce excess androgens (male hormones), which causes many small follicles to develop but prevents any single egg from maturing and releasing. This disrupts ovulation, the most fundamental requirement for conception.
- Endometriomas: Sometimes called “chocolate cysts,” these form when tissue similar to the uterine lining grows on or inside the ovary. They can damage surrounding egg-containing tissue and create inflammation that affects egg quality and implantation.
- Dermoid cysts (teratomas): These are benign growths that don’t typically affect fertility unless they grow large enough to displace normal ovarian tissue or cause the ovary to twist.
- Cystadenomas: Fluid-filled cysts that develop on the ovary’s surface. Like dermoids, they usually only become a fertility concern if they’re large or symptomatic.
If your doctor found a cyst on ultrasound, the first question to ask is what type it is. That answer determines everything that follows.
How PCOS Disrupts Conception
PCOS is the most common cyst-related cause of infertility, and it works through several overlapping mechanisms. The excess androgens produced by the ovaries prevent follicles from fully maturing, so eggs aren’t released on a regular schedule. Many women with PCOS have irregular or absent periods, which is the most obvious sign that ovulation isn’t happening consistently.
Beyond the ovulation problem, PCOS affects the uterine lining itself. Without regular ovulation, the body doesn’t produce adequate progesterone. This means the endometrium is continuously exposed to estrogen without progesterone’s balancing effect, which reduces the lining’s receptivity to a fertilized egg. Even when ovulation does occur, implantation can be harder.
Insulin resistance plays a significant role too. Between 50 and 70% of women with PCOS have some degree of insulin resistance, where the body produces extra insulin to compensate. That excess insulin acts almost like an additional hormonal signal to the ovaries, further driving androgen production and worsening cyst formation. This is why blood sugar management is such a central part of PCOS treatment for fertility.
Lifestyle Changes That Improve Your Odds
For women with PCOS specifically, diet and exercise changes can be as effective as medication. A randomized controlled trial of 150 overweight women with PCOS found that an anti-inflammatory diet combined with physical activity for 12 weeks improved menstrual regularity and led to spontaneous pregnancies. The participants lost about 7% of their body weight, and the results were comparable to those achieved with metformin, a medication commonly prescribed for PCOS-related infertility.
A separate trial of 76 women with PCOS found that combining a low-glycemic-index diet with treatment before and during pregnancy cut the miscarriage rate in half, from 40% to 20%. Low-glycemic eating means choosing foods that don’t spike blood sugar quickly: whole grains over refined carbs, pairing carbohydrates with protein or fat, and emphasizing vegetables, legumes, and nuts.
These findings point to a practical starting strategy if you have PCOS and want to conceive: focus on reducing inflammation and improving insulin sensitivity through food choices and regular movement. Even modest weight loss (5 to 10% of body weight) can restart ovulation in some women. This doesn’t mean weight loss is necessary for everyone with PCOS, but for those who are overweight, it’s one of the most evidence-backed approaches available.
When Surgery Helps and When It Hurts
Surgery to remove ovarian cysts is sometimes necessary, but it comes with a real tradeoff for fertility. Cyst removal (cystectomy) reduces your ovarian reserve, which is the pool of eggs your ovaries have available. Researchers measure this through a hormone called AMH, and studies show AMH drops significantly after surgery.
Endometriomas cause the most damage during removal. Because these cysts don’t have a clear capsule separating them from normal ovarian tissue, surgeons inevitably strip away some healthy tissue along with the cyst. AMH levels drop by about 54% one week after endometrioma removal. By three months, levels recover somewhat but don’t return to baseline, indicating some permanent loss of egg supply. Dermoid cysts fare better: AMH recovers to about 83% of pre-surgery levels by three months.
This doesn’t mean surgery should be avoided when it’s needed. Surgical removal is generally recommended when a cyst is large, growing on repeated imaging, causing significant pain, or raising concern for malignancy (features like thick internal walls, solid components, or increased blood flow on ultrasound). For women with deep endometriosis who want to conceive, surgery can be effective. One study of 74 women who had endometriosis surgery found that 50% became pregnant within three years. Of those pregnancies, 43% happened naturally and 57% used assisted reproductive technology. Across the broader research, pregnancy rates after endometriosis surgery range from 34 to 84.5%.
The key consideration is timing. If you’re planning to conceive, discuss with your doctor whether a cyst truly needs removal now or whether it’s safe to try getting pregnant first, particularly if your cyst is stable and not causing symptoms.
Tracking Ovulation With Cysts
If your cysts aren’t blocking ovulation, the standard approach to getting pregnant applies: timing intercourse to your fertile window. But cysts can make ovulation tracking trickier. PCOS in particular can cause irregular cycles, making calendar-based predictions unreliable.
Ovulation predictor kits that measure the luteinizing hormone (LH) surge in urine work for many women with cysts, though women with PCOS sometimes have chronically elevated LH levels that can cause misleading results. In that case, tracking basal body temperature (a slight rise confirms ovulation after it happens) or monitoring cervical mucus changes can provide additional confirmation. Some women find that combining multiple tracking methods gives a clearer picture.
If you’ve been tracking for several months and can’t identify a consistent ovulation pattern, that’s useful information to bring to your doctor. It may mean you need medication to trigger ovulation, which is the most common first-line fertility treatment for women with PCOS.
Medical Treatments for Ovulation
When lifestyle changes alone aren’t enough to restore regular ovulation, fertility medications can help. For PCOS, the typical first step is an oral medication that stimulates the ovaries to mature and release an egg. Your doctor may also recommend an insulin-sensitizing medication if blood sugar issues are contributing to the problem, since improving insulin resistance can restore ovulation on its own in some cases.
For endometriomas, the decision between surgery and going directly to IVF depends on cyst size, your age, your AMH levels, and whether you have other fertility factors at play. Younger women with good ovarian reserve may benefit from surgical removal before trying to conceive, while women with lower reserves might be better served by proceeding straight to IVF to preserve as many eggs as possible.
The timeline matters more than many women realize. If you’re under 35, most doctors recommend trying for 12 months before escalating treatment. If you’re 35 or older, that window shortens to 6 months. But if you already know you have a cyst type that affects fertility, there’s no reason to wait before having a conversation about your options. Getting baseline bloodwork, including AMH and hormone levels, gives you and your doctor a clearer picture of where you stand and how urgently to act.