Libido changes across your menstrual cycle

Desire doesn't stay flat through the month for most people. Hormones move through predictable phases, and each one tends to affect desire differently.

• Follicular phase: estrogen rises steadily.
• Ovulation: estrogen peaks just before ovulation. A 2019 meta-analysis pooling data from more than 7,500 women found that sexual behavior with partners, and risk recognition, both ran higher in this phase ( [2]).
• Luteal phase: progesterone takes over, and for some people that shift brings less interest in sex along with more sensitivity to stress ( [4]).

Not every study finds the same swing. A secondary analysis of a placebo-controlled trial in 171 regularly cycling women found only small, non-significant differences in sexual function, well-being and mood across the follicular, ovulation and luteal phases ( [1]).

The hormone pattern is real on average, but it doesn't predict your own month reliably.

Ovulation tends to be the high point for desire in studies that find a cycle effect at all. The late luteal phase, the days right before your period, tends to be the low point. Below is roughly how the four phases compare.

Phase	What's happening hormonally	Typical pattern in desire	Strength of evidence
Menstrual	Estrogen and progesterone both low	Often lower, highly individual	Limited
Follicular	Estrogen rising	Often rising toward mid-cycle	Moderate
Ovulation	Estrogen peaks, slight rise in testosterone	Often highest, more interest in partners	Moderate, from pooled studies ( [2])
Luteal	Progesterone rises then falls	Often lower, tied to stress and mood	Mixed ( [1], [4])

For more on what's shifting hormone by hormone, see menstrual cycle hormones, phase by phase and the 4 phases of the menstrual cycle.

Three hormones do most of the work.

• Estrogen: generally supports interest in sex and vaginal lubrication, and peaks right before ovulation.
• Progesterone: rises through the luteal phase and tends to work against that effect, linked to lower desire for many people.
• Testosterone: present in small amounts, nudges up around ovulation too and may add to the rise some people feel.

Mood and stress play a part too, separate from hormones alone.

A 68-woman study that tracked daily ratings for 75 days found that sociability's drop came before changes in mood symptoms, while stress sensitivity's rise both preceded and followed those mood changes ( [4]).

That suggests a dip in desire before your period is tangled up with rising stress sensitivity and mood changes, which the study found move together rather than in one clear direction.

Progesterone's rise and fall across the luteal phase both seem to play a part in flatter desire, though the research doesn't pin down which matters more.

For a day-by-day breakdown, see how your menstrual cycle affects your mood.

A lower sex drive in the week before your period can be ordinary PMS. It can also be a flattened mood from PMDD, or it can be about your relationship and have little to do with hormones at all.

The same trial that found little hormone effect on sexual function found that relationship status mattered more. Women in stable relationships scored better on sexuality measures than single women (p < 0.001), regardless of cycle phase ( [1]).

A cycle pattern doesn't make a real relationship problem imaginary. If low desire only shows up the week before your period and eases once it starts, hormones are probably part of the picture. If it's there most of the month, or it comes with a fight that keeps repeating, the cycle isn't the whole story.

Read more about what's happening in your body and mood during the luteal phase.

Rating something daily, rather than recalling it later, gives a more reliable picture. That's the approach researchers recommend for studying the cycle ( [3]).

1. Note your cycle day each morning, or use the cycle phase calculator to estimate where you are.
2. Rate your interest in sex most days, from 0 (none) to 3 (strong), without judging the number.
3. Add one line about stress, sleep or an argument, since those move desire too.
4. After two or three cycles, compare your ratings to the menstrual cycle hormone chart.

A pattern usually shows up by the second or third cycle. Your own chart tells you more than any average ever will.