If a person has her period on the 30th, her menstrual cycle is 28 days. This means that every two weeks her cycle will repeat itself. At this time, a woman's body begins to prepare for pregnancy and enters ovulation.

Women can determine when they are ovulating by taking their temperature or looking at their cervical mucus. An increase in body temperature usually occurs during ovulation and the cervical mucus becomes clear, transparent and sticky.

During ovulation, a woman's body undergoes a series of changes that help ensure that sperm can meet the egg. Women may experience fatigue, headaches, or breast discomfort; these reactions are usually temporary.

If a woman wants to get pregnant, it's best to have sex during her ovulation period. Having sex can help ensure that sperm and egg meet and increase your chances of pregnancy.