Ovulation is 4 days early

Normally, a woman's menstrual cycle is 28 days, but sometimes they come a few days early or late. Recently, a study showed that a woman's menstrual cycle may be affected by a number of factors, one of which is changes in hormone levels.

Researchers studied a group of women whose average menstrual cycle was 28 days, but four of them ovulated early. During the course of the study, the researchers measured the women's hormone levels and found that four of the women's hormone levels were four days earlier than average.

Researchers believe that this change in hormone levels may be caused by certain factors, such as work stress, diet, lifestyle, etc. They speculate that this change may have some impact on women's fertility.