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.
Fertile days in your menstrual cycle occur around the time of ovulation, when your ovaries release a mature egg for fertilization. If you are trying to get pregnant, it is important to plan sex during your most fertile days. Fertile Days in Menstrual Cycles. Fertile days vary from woman-to-woman, depending on the length and regularity of her menstrual cycles. Women are most fertile during ovulation, when a woman releases an egg to be fertilized.