The fertile window is roughly the 5 days before ovulation plus the day of ovulation itself. Ovulation typically happens around 12–14 days before your next period in a regular cycle.
Are safe days a reliable form of contraception?
🤰 Pregnancy
Calendar-based safe-day estimates are useful for awareness but not highly reliable on their own, especially with irregular cycles. For dependable contraception, condoms, hormonal methods, or an IUD are recommended.