Science

• Females are estimated to have around 1-2 million oocytes at birth, but by puberty only 300,000 remain
• Ovulation phase usually occurs around day 12 to 19 of the menstrual cycle (midway through the cycle)
• Luteal phase begins after ovulation and lasts from day 15 to the 28th day of the cycle
• Corpus luteum produces progesterone temporarily and disappears if fertilization doesn't happen
• Dysmenorrhea is the feeling of discomfort or pain and cramps experienced around the time of menstruation