I am 31 years old. my menstruation cycle was in aug-19th, sept-13th and oct-6th. is my cycle regular. when will i ovulate. when can i conceive. ?

Mid cycle: Women usually ovulate in the middle of their cycle. It depends on your cycle length. You're describing your cycles as less than 28 days. Thus you probably are ovulating on day #12 or #13 with day #1 being when your start your period. I recommend you have intercourse days #10-14.

Ovulation kit: Quick and dirty way to find out when you're most fertile.