Luteinizing Hormone is released in the morning, so pls try to use D仔 during around noon time. It won't be able to detect from the first urine after wake up. also, test at nite will be too late as well. It's the info. my hb searched from internet.
I had a +ve reading tdy b4 10am, I tried last month also b4 12am.
Good Luck! Hope yr son will have bro/sis to play with soon.