Does your sex drive change through your menstrual cycle?

Your libido, phase by phase

What the research says

A study that measured hormones in saliva every day across one to two cycles found that day-to-day desire went up with estradiol (a form of estrogen) and down with progesterone. The fall in desire from mid-cycle to the luteal phase was explained by rising progesterone. Testosterone didn't add much once those two were accounted for. Other studies have found similar mid-cycle peaks, though not in everyone.

From an evolutionary angle, a peak around ovulation makes sense: it's when pregnancy is most likely. That's also why fertile days need extra care if you don't want to get pregnant.

Why your pattern might look different

• Hormonal contraception that stops ovulation flattens the natural swings, so the monthly peak often fades.
• PMS and PMDD: tiredness, bloating and low mood in the luteal phase can push desire down further.
• Stress and sleep often outweigh hormones.
• Relationship context: feeling close, safe and unrushed matters as much as biology.
• Antidepressants, especially SSRIs, can lower libido.
• Perimenopause and postpartum bring their own big shifts.

Know your pattern, not the textbook

Tracking libido with mood for two or three cycles shows your real rhythm. Some people peak right before their period; see why do I feel horny before my period. Lulu's fertile window is an estimate to understand your cycle, not contraception.

Using it in a relationship

Differences in desire are one of the most common sources of tension for couples. Seeing that a dip is cyclical ("it's my luteal week") can take the personal sting out of it for both of you. Some couples share cycle info so the non-menstruating partner understands what's going on; see PMS and relationships.