Hello, I am new, this is my first post so please excuse if this was asked already,but I am trying for baby number 4 and I have a question about cycles. See my son from my first marriage is 19 and then I have a 3 year old (in october) and an 11 month old. My cycle for my whole life was 28 days. On time never any issues. However after my last baby was born, my period is now 26 days one month and 30 the next. How do I tell when I am ovulating if just going by dates? We want to baby dance a few days before ovulation but I have no idea when that is now and does this mean I will have trouble getting pregnant? BTW I am 39, thanks in advance for all who answer.