Anovulatory cycle: what it means when you do not ovulate

Menstrual cycles can vary from person to person, and occasional changes are often nothing to worry about. However, if ovulation does not happen regularly, it can affect both your cycle and your ability to conceive. This is called anovulation, or an anovulatory cycle. Anovulation is common and is linked to around 30% of infertility cases. Because you may still bleed even when you have not ovulated, it is not always obvious when it is happening. Understanding the signs of anovulation can help you better recognise patterns in your cycle, identify possible hormone imbalances, and know when to seek further support.

Table of Contents

• What is an anovulatory cycle?

• How to recognise and manage anovulatory cycles

• Common causes of anovulatory cycles

• Understanding your cycle and next steps

• Frequently asked questions about anovulatory cycles

What is an anovulatory cycle?

Anovulation, also called an anovulatory cycle, occurs when an ovary does not release an egg during the menstrual cycle.

Ovulation is the release of an egg from the ovary. In a typical 28-day menstrual cycle, it often happens around day 14, although the exact timing can vary from person to person. The released egg can be fertilised by sperm, which may lead to pregnancy.

Source: Cleveland Clinic, 2026; Cleveland Clinic, 2024 

How to recognise and manage anovulatory cycles

It is not always easy to tell whether you have ovulated just by looking at your period. Some people bleed regularly even when ovulation has not occurred, while others may notice irregular, delayed, very light, or unusually heavy bleeding.

Ways to better understand your cycle include tracking:

• Cycle length and whether it changes from month to month

• Bleeding patterns (e.g  spotting, heavy bleeding, or missed periods)

• Cervical mucus changes (e.g. clear, stretchy)

• Basal body temperature

• Watch out for other symptoms

Possible signs of an anovulatory cycle include:

• Irregular periods

• Very heavy periods

• Very light periods

• Not getting periods

• No egg white cervical mucus

• Irregular basal body temperature

Source: Cleveland Clinic, 2024 

Common causes of anovulatory cycles

Anovulatory cycles can happen for many reasons. Sometimes they are temporary and linked to lifestyle or short-term changes. In other cases, they may be related to an underlying health condition. Common causes include:

1. Hormonal imbalance
   Anovulation is usually caused by an imbalance in one or more hormones involved in ovulation, especially gonadotropin-releasing hormone, follicle-stimulating hormone, and luteinising hormone. Other hormones, such as testosterone and prolactin, can also interfere with ovulation.

2. High androgen levels
   Androgens include hormones such as testosterone, androsterone, and androstenedione. If androgen levels are too high, the follicles in the ovaries may stay small instead of maturing and releasing an egg. This can be linked to polyendocrine metabolic ovarian syndrome, obesity, adrenal gland issues, pituitary gland disorders such as Cushing’s syndrome or acromegaly, and certain medications such as anabolic steroids.

3. Pituitary gland dysfunction
   The pituitary gland produces luteinising hormone and follicle-stimulating hormone, both of which are needed for ovulation. If the pituitary gland does not release enough of these hormones, ovulation may not occur. This can happen due to very low body weight, long-term excessive or intense exercise, Sheehan’s syndrome, a pituitary gland tumour, or pituitary gland damage.

4. High prolactin levels
   Prolactin is mainly involved in breast milk production, but high prolactin levels can suppress luteinising hormone and follicle-stimulating hormone. This can prevent ovulation. Causes include breastfeeding, a prolactinoma, pituitary gland damage, kidney, liver, or thyroid illness, and certain medications such as psychotropic drugs, narcotics, ulcer medicines, and medicines for elevated stomach acid.

5. Underactive thyroid (hypothyroidism)
   Low thyroid hormone levels can increase prolactin production. Since prolactin suppresses the hormones needed for ovulation, hypothyroidism can lead to anovulation. Possible causes include Hashimoto’s thyroiditis, thyroid surgery, radiation therapy, and certain medications such as lithium.

6. Low gonadotropin-releasing hormone levels
   Gonadotropin-releasing hormone is produced by the hypothalamus and helps trigger the release of luteinising hormone and follicle-stimulating hormone. If GnRH levels are too low, the body may not produce enough of these ovulation-related hormones. Damage to the hypothalamus can cause low GnRH levels.

Source: Cleveland Clinic, 2024 

Understanding your cycle and next steps

Understanding whether you are ovulating can give you valuable information about your menstrual health, hormone balance, and fertility. One irregular cycle does not necessarily mean something is wrong, but repeated anovulatory cycles are worth paying attention to.

Homed-IQ’s home tests can be a helpful first step if you want more insight into your hormones from home. Test results can help you understand what may be happening in your cycle and support a more informed conversation with a healthcare provider. 

Frequently asked questions about anovulatory cycles

What are the complications of anovulation?

• Infertility: Not ovulating can make it difficult to become pregnant.

• Amenorrhea: This means not having regular menstrual periods.

• Hormonal imbalances: These may cause symptoms such as weight gain, hair loss, or acne.

• Endometrial hyperplasia: Without enough progesterone, the uterine lining may become too thick.

• Osteoporosis: Low oestrogen levels can weaken bones over time.

• Cardiovascular risk: Hormonal changes may increase the risk of conditions linked to heart disease, such as insulin resistance or diabetes.

Source: Cleveland Clinic, 2024 

Can you still get your period if you do not ovulate?

Technically, you cannot have a true menstrual period without ovulating, because menstruation follows ovulation when an egg is not fertilised.

However, you can still bleed without ovulating. This is called anovulatory bleeding or abnormal uterine bleeding, and it may feel like a period but does not follow a normal ovulatory cycle.

Source: Cleveland Clinic, 2024 

Do anovulatory cycles affect fertility?

Yes. Anovulation is common and accounts for about 30% of infertility cases.

Source: Cleveland Clinic, 2024