According to the American Pregnancy Association, a woman ovulates between day 11 and day 21 of her menstrual cycle. The days of a woman's period are included in this count. The day that a woman ovulates depends on the length and regularity of her menstrual cycle. Mayo Clinic explains that an average menstrual cycle lasts between 21 and 35 days.
The American Pregnancy Association explains that women can pay attention to their bodies for symptoms that are common during ovulation. Symptoms of ovulation include change in cervical mucus, cervical position and cervical firmness. Pain on one side of the abdomen, spotting, increased sex drive, breast sensitivity, abdominal bloating, heightened sense of smell and changes in the basal body temperature are also symptoms of ovulation.
Parents magazine explains that several factors can influence ovulation and fertility. Body fat levels that are 10 to 15 percent above or below normal ranges can cause ovulation to occur at different times during the menstrual cycle. Hormonal imbalances can increase or decrease the length of the menstrual cycle and lead to irregular ovulation. Other conditions such as lupus, diabetes, rheumatoid arthritis, stress, drinking alcohol, smoking tobacco, taking medication or exposure to environmental hazards can alter ovulation and menstrual cycle length.