My period started june 28. when will i ovulate? ttc

If cycle 28d-July 11: The ave. Adult menstrual cycle varies bet. 28 and 35 days in length. Ovulation occurs when there is a surge in lh hormone. This most consistently occurs 14 days before the onset of the next cycle. Best way to approximate ovulation is to substract 14 days from when you would expect the onset of your next period. If your cycles ave 28 days, then next cycle due 7-25, minus 14 d = july 11ovulation!