Quick OPK question?

[superbaby]

Day 13 yesterday (usually ovulate day16-18) and have a v faint line on OPK - do I have to wait until line is same/darker than test line before an indication of O in 24-36 hours?

[abeckaj]

yes. The line has to be as dark or darker than the control line. When it is getting darker you might want to test a few times a day as some peoples surges are short and you could miss it.

[wantagirl]

I am new to using opk's to but I did use them this month. Mine started very light for 2 days and then on the 3rd test it became much darker so I would say yes you should wait for it to be darker to know if it is positive or not. I would say you will see it gradually get darker in the next day or two. It wouldn't hurt to start bd'ing now though because sperm can live for 3 to even 7 days in the right conditions.