Calculadora de Ovulação
Preveja seus dias mais férteis e sua janela de ovulação.
Data de Ovulação
a-
Planeje a gravidez com precisão
A ovulação geralmente ocorre 14 dias antes do início da próxima menstruação. Os dias mais férteis são os 5 dias anteriores ao dia da ovulação, incluindo este.
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Estimating Your Fertile Window and Ovulation Day
Visão Geral
Ovulation is when an ovary releases an egg, and the days around it are the most fertile of the cycle. This calculator estimates your likely ovulation day and fertile window from your last period and cycle length, in your browser. It is a guide, not a contraception or fertility guarantee.
Como usar (passo a passo)
- 1
Enter your last period date
The first day of your most recent period.
- 2
Enter your cycle length
The average number of days from one period to the next.
- 3
Read your fertile window
The tool highlights the estimated ovulation day and surrounding fertile days.
Como Funciona
Ovulation typically occurs about 14 days before the next period starts, so the tool counts backward from your estimated next period based on cycle length. The fertile window spans roughly the five days before ovulation plus the ovulation day itself, because sperm can survive several days. Cycle variability means these are estimates; ovulation tests or temperature tracking add precision.
Quando usar
Identifying the days most likely for conception. Understanding your cycle for family planning. Tracking your fertile window alongside other signs.
Perguntas Frequentes
Calendar estimates are not reliable contraception because ovulation timing varies. Use a proven contraceptive method if preventing pregnancy is the goal.
Notas Importantes
Fertility-window predictions are estimates and are not a reliable form of contraception or medical advice. Cycles vary — consult a qualified healthcare provider for family-planning or fertility guidance.