Can I ovulate as early as c8 even my cycle length is rang from 35 to 39 days?

Thanks for your question, Sophal.  We'd be happy to help.  Are you using our opk's that have a pink cap or a purple cap?  If you're using our Advanced opk's with the purple cap, did you see a flashing smiley or a solid smiley?  

Hi Karen, thank for your respond. I used the pink cap. I received only one peak smiling face. That was the only one smiling face ( peak). Is it possible that I can ovulate that early? because my normal cycle length is between 35 to 39 days

Thanks for the info, Sophal.  Ovulation typically occurs between 12-16 days before the start of your next cycle.  May I ask if you're taking any fertility medications?

Karen, I am not on any kind of medications. Except the prenatal vitamins.

Thanks for writing back, Sophal.  We'd like to chat with you by phone.  Are you in the US?

Karen, sure I am in us

Hi Sophal, we'd be happy to give you a call tomorrow, or you can call us tomorrow when it's convenient for you.  Our toll-free number is 1-800-321-3279, and we're open from 8:30-5:00pm Eastern time.  When calling, please mention reference #FB396.  If you'd like us to call you tomorrow, please let us know what time to call, and which time zone you're in.  We look forward to chatting with you!