Why is ovulation a few days early?

First, the onset of puberty can advance ovulation. Puberty is the period of time before humans enter adulthood, usually starting around the age of 10. The arrival of puberty causes changes in hormonal levels, making a woman's menstrual cycle unstable and causing ovulation to occur earlier.

Secondly, stress may also lead to early ovulation. Research shows that chronic stress may affect a woman's hormone levels, causing ovulation to occur earlier. Chronic stress may cause elevated cortisol levels in women, inhibiting egg cell growth and maturation.

In addition, diet and lifestyle can also affect the advancement of ovulation. For example, a long-term diet lacking adequate protein and calcium may cause a woman's menstrual cycle to be erratic, causing ovulation to occur earlier. In addition, long-term smoking and drinking may also affect a woman's menstrual cycle, leading to early ovulation.

Finally, genetic factors may also influence early ovulation. Some genetic factors may cause instability in a woman's menstrual cycle, causing ovulation to occur earlier.

Overall, the early days of ovulation can be caused by a variety of factors. Whether it is the arrival of puberty, stress, diet and lifestyle, or genetic factors, it may have an impact on a woman's menstrual cycle, causing ovulation to occur earlier.