I agree that the photos seem to be taken too far away from the strips to be able to properly determine the ratio between the test and control line but I am not sure which app is being used so I am not sure of the instructions given there.
Just like
@Lulu Goss I use Premom and they have quite specific instructions on how to take the photo as well as (imo) clear instructions which makes my life easier. I'll attach photos from my last cycle and current cycle of using OPKs, I had to change the lightbulb in my bathroom between cycles so you can also see the difference in lighting, although it's only a difference of a soft and warm light and I saw that this had little to no effect on my photos of the test strips.
Some people have a sudden surge of LH and some people have a gradual surge, I fall into the latter category which you can see from my tests as well. But the only way I was able to see this was by testing at around the same time every day and twice a day as I was nearing my potential fertile period. I'd recommend testing twice a day as well until you have more knowledge about your own cycle so you know when you are usually reaching your fertile period x
You'll also see that between two cycles my fertile periods take place under different days of the cycle, your body isn't a machine so you might ovulate later than you might expect. Just keep testing, I know it can be frustrating, I only calm down once I see my high and peak levels
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