Frustration may appear as a result of these issues and because many of them lead to painful sexual intercourse, many women prefer not having sex at all. Acetylcholine  Sex hormone levels and the menstrual cycle[ edit ] A woman's desire for sex is correlated to her menstrual cycle , with many women experiencing a heightened sexual desire in the several days immediately before ovulation ,  which is her peak fertility period, which normally occurs two days before until two days after the ovulation. Testosterone is one of the hormones controlling libido in human beings.
In the week following ovulation, the testosterone level is the lowest and as a result women will experience less interest in sex. Environmental stress, such as prolonged exposure to elevated sound levels or bright light , can also affect libido. Some people want to have sex every day, or more than once a day; others once a year or not at all.
Also, women commonly lack sexual desire in the period immediately after giving birth. A sexual desire disorder is more common in women than in men. On the other hand, a reduced libido is also often iatrogenic and can be caused by many medications, such as hormonal contraception , SSRIs and other antidepressants , antipsychotics , opioids and beta blockers.
In contrast, a female's libido increases slowly during adolescence and peaks in her mid-thirties.
The 13th day is generally the day with the highest testosterone levels.