What Is the Luteal Phase? Symptoms, Hormones & What Happens Before Your Period

What Is the Luteal Phase?

The luteal phase is the part of your menstrual cycle that begins after ovulation and ends when your next period starts. During this time, progesterone rises to prepare the uterus for a possible pregnancy, and you may notice symptoms such as breast tenderness, bloating, mood changes, fatigue or cravings.

It is the second half of the menstrual cycle and can look slightly different from person to person.

Understanding the luteal phase can make it easier to recognise changes in your body and understand why you may feel different in the days before your period.

If you're trying to understand your entire cycle, our [Complete Period Guide] can help you understand what happens at each stage.

When Does the Luteal Phase Start?

The luteal phase begins after ovulation.

During ovulation, an egg is released from the ovary. After the egg is released, the follicle that contained it changes into a structure called the corpus luteum.

The corpus luteum produces progesterone, a hormone that helps prepare the lining of the uterus for a potential pregnancy.

If pregnancy doesn't occur, progesterone levels eventually fall. This hormonal change triggers the shedding of the uterine lining, which is your period.

What Happens During the Luteal Phase?

Several hormonal and physical changes happen during this phase.

Progesterone increases

Progesterone is the main hormone associated with the luteal phase. It helps maintain the uterine lining and prepares the body for a possible pregnancy.

Body temperature may rise

After ovulation, progesterone can cause a small increase in basal body temperature.

People who track their basal temperature may notice this change after ovulation.

The uterine lining stays prepared

The lining of the uterus continues developing in preparation for a fertilised egg.

If pregnancy does not happen, hormone levels decline and menstruation begins.

What Are Common Luteal Phase Symptoms?

Luteal phase symptoms can vary widely.

Some people notice very little change, while others experience several physical and emotional symptoms before their period.

Common symptoms include:

• Bloating

• Breast tenderness

• Fatigue

• Food cravings

• Headaches

• Mood changes

• Irritability

• Acne

• Changes in appetite

• Constipation

• Feeling more tired than usual

These symptoms can overlap with PMS because PMS occurs during the later part of the menstrual cycle, often during the luteal phase.

If mood changes, cramps or other symptoms become difficult to manage every month, it can help to keep track of them alongside your cycle.

How Long Does the Luteal Phase Last?

The luteal phase commonly lasts around 12–14 days, although there can be natural variation between individuals and from one cycle to another.

Unlike the follicular phase, which can vary considerably in length, the luteal phase tends to be more consistent for many people.

If your cycles are irregular, however, predicting ovulation and the exact length of your luteal phase can be more difficult.

Why Do You Feel Different Before Your Period?

Hormonal changes are one of the main reasons you may notice physical and emotional changes before your period.

After ovulation, progesterone rises. Later, if pregnancy does not occur, progesterone and estrogen levels fall.

These changes can affect several systems in the body, which may explain symptoms such as bloating, breast tenderness, headaches, tiredness and mood changes.

This is also why tracking your cycle can be useful. You may start noticing that certain symptoms appear at roughly the same point every month.

Is the Luteal Phase the Same for Everyone?

No. Menstrual cycles naturally vary between individuals, and the length and symptoms of the luteal phase can vary as well.

Stress, hormonal conditions, illness, medications and other factors can influence menstrual cycles.

A single shorter or longer cycle doesn't necessarily indicate a problem.

Can You Get Pregnant During the Luteal Phase?

Pregnancy is most likely to occur around ovulation because the egg is available for fertilisation for a limited period.

Once ovulation has occurred, the fertile window is generally closing.

However, because it can be difficult to know exactly when ovulation occurred without tracking it, relying only on calendar dates isn't a reliable way to prevent pregnancy.

When Should You Talk to a Doctor?

You don't necessarily need medical attention simply because your luteal phase feels different from someone else's.

However, speak with a healthcare professional if you experience persistent or severe symptoms, major changes in your menstrual cycle, unusually heavy bleeding, severe pain or symptoms that interfere with your daily life.

If your periods have become consistently irregular, it is also worth discussing the change with a doctor.

Frequently Asked Questions

What is the luteal phase?

The luteal phase is the part of the menstrual cycle that occurs after ovulation and before the next period. During this stage, progesterone rises and prepares the uterus for a possible pregnancy.

What are the most common luteal phase symptoms?

Common symptoms include bloating, breast tenderness, fatigue, cravings, headaches, acne and mood changes. Not everyone experiences symptoms, and their intensity can vary from cycle to cycle.

How long is the luteal phase?

The luteal phase often lasts around 12–14 days, although individual variation is normal. The length can also differ depending on the timing of ovulation and other factors affecting the menstrual cycle.

Why do I feel tired during the luteal phase?

Hormonal changes after ovulation may contribute to tiredness and changes in energy levels. If fatigue is severe, persistent or affecting your daily activities, it's worth discussing it with a healthcare professional.

Is the luteal phase before your period?

Yes. The luteal phase begins after ovulation and ends when your next period starts. This means the days immediately before your period are part of the luteal phase.