ovulation kits are simple chemistry wrapped in maximum anxiety. the strip detects lh — the hormone that surges a day or so before an egg releases. read right, five strips are plenty.
when to start
count back 17 days from your usual cycle length and start testing around then — for a 28-day cycle, that's about day 11. one strip a day, same time each day.
the rules that save strips
· test between 10am and 8pm — the surge often misses first-morning urine.
· go easy on water for two hours before; a diluted sample fades every line.
· read at 5 minutes, in good light. lines that appear after 10 minutes don't count.
the trap everyone falls into
a faint test line is NOT positive. lh is always present at low levels — most strips show something. the kit is positive only when the test line is as dark as (or darker than) the control line. what you're watching for isn't a line — it's a trend: faint, clearer, strong, then suddenly as-dark-as-control. that jump is the surge.
when the surge shows
ovulation usually follows within a day or so. the fertile days are the surge day and the day or two after — and the two or three days before it, which is why the trend matters more than the single positive.
what the app does with it
mark each strip in efertility — even the negatives — and the intensity bars draw your trend, test by test. on a surge, her ring's golden window re-anchors to her actual biology instead of a calendar guess. estimates support planning; they are never contraception.