Know Your Window.
Zero Stress, Just Science.
Conception isn't about stressful spreadsheets or obsessive temperature charts. Understand your body's natural 6-day fertile window with gentle biological precision.
The Two Biomarkers Your Body Gives You
Your body leaves clear physiological clues every single month. Helomi translates them into simple, actionable daily insights.
1. Cervical Fluid (The Biological Shield)
Outside your fertile window, cervical mucus is thick or acidic to block bacteria. In the 3–5 days before ovulation, estrogen surges, turning your fluid into clear, stretchy, egg-white consistency that nourishes sperm.
2. Basal Body Temperature (BBT Shift)
After ovulation, the ruptured follicle becomes the corpus luteum, secreting progesterone. Progesterone acts on your hypothalamus, raising your resting body temperature by 0.3°C–0.5°C until your next period.
Simulate Your Ovulation Date
Adjust your cycle parameters below to see your personalized conception probability timeline.
Fertility Questions & Answers
How long is the true fertile window in each menstrual cycle?
The biological fertile window lasts approximately 6 days: the 5 days leading up to ovulation plus the day of ovulation itself. This is because healthy sperm can survive inside fertile cervical mucus for up to 5 days, while the released egg survives for roughly 12 to 24 hours after ovulation.
How do I know I am actually ovulating if my period is irregular?
Helomi tracks two key secondary biomarkers: Cervical Mucus and Basal Body Temperature (BBT). When estrogen rises prior to ovulation, cervical fluid becomes clear, slippery, and stretchy (like raw egg whites). Following ovulation, progesterone causes a sustained rise in resting morning body temperature by 0.3°C to 0.5°C.
Can I use Helomi for natural family planning / natural conception?
Yes. Helomi calculates your dynamic conception probability curve, highlighting your peak 3-day optimal window without causing emotional exhaustion or clinical stress. We also offer pre-conception nutrition plans and direct booking with fertility gynaecologists.