The carat (ct) is a unit of mass equal to 200 mg (0.2 g; 0.007055 oz) and is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, and soon afterwards in many countries around the world.
Depending on your cycle length the most fertile days in the cycle varies: If you have 28 days between periods ovulation typically happens on day 14, and the most fertile days are days 12, 13, and 14. If you have longer cycles, say 35 days between periods, ovulation happens on day 21 and the most fertile days are days 19, 20, and 21.
If your cycle is shorter than 28 days or your period is longer than five days, you are likely to be fertile during your period. It depends on personal situation. For a woman who has 6 days of period and 28 days of menstrual cycle, the ovulation is usually 7â8 days after last day of period. That means 7 days after the period, she becomes fertile. The situation varies from people to people.