Fertile window
The fertile window is the span of days in your menstrual cycle when having unprotected sex can result in pregnancy. It includes the five days before ovulation and the day of ovulation itself, because sperm can survive in the reproductive tract for up to five days. For a typical 28-day cycle this window falls roughly between days 10 and 15, but the exact timing shifts with cycle length. Tracking cervical mucus changes, basal body temperature, or using an ovulation predictor kit can help you identify your personal fertile window more accurately than calendar counting alone.
What This Means for You
Understanding Fertile window is an important part of your preconception journey. When you are trying to conceive, knowing terms like this helps you track your cycle accurately and communicate with your doctor or fertility specialist.
Explore our Trying to Conceive hubGood to Know
The fertile window is an estimate based on predicted ovulation, not a guaranteed fertility signal. Women with irregular cycles may benefit from using multiple tracking methods together for a clearer picture.
Related Terms
Source: https://www.pregnancybirthbaby.org.au/glossary-of-pregnancy-and-labour
Always consult your healthcare provider for personalised advice.
Free Tools for Singapore Parents
Put your knowledge into action with our free calculators and trackers.