
Cycle and fertility
Fertile window, ovulation and body signs, without unrealistic promises.
ExploreUnderstand your cycle, organize your next steps and find responsible answers for this moment full of hope.

Short paths, clear language and a next step whenever it makes sense.
Create your free account to take your stage with you and continue on the website or in the app.
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EstimateEstimate your fertile window from your average cycle length.
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FreeSee your gestational age and estimated due date.
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EstimateFind a likely window based on your estimated due date.
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A–ZSearch names by meaning, origin, theme and letter.
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GuideHow to recognize the first signs of pregnancy
UnderstandImplantation: what it is and when it may happen
AvailableCalculate your estimated fertile window
PlanningHow to prepare your body for pregnancy: a doable start
GuideWhen the positive doesn't come: how to cope with anxiety while trying to conceive
GuideTrying to conceive after 40: fertility, self-care and when to seek help
GuideEndometriosis: symptoms, diagnosis, treatment and its link to fertilityNilu is independent and free. If it helped you, support it once with any amount from R$ 1 via Pix and help more families use the tools and content.