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. read more
There are two phases to the menstrual cycle- the follicular phase in which an egg is matured for release, and the luteal phase which prepares the endometrium for a pregnancy. read more
14 days. This is very consistent in a fertile woman regardless of the total length of a cycle. read more