fertile window
nounUK /ˈfɜː.taɪl ˈwɪn.dəʊ/
US /ˈfɝː.t̬əl ˈwɪn.doʊ/
The few days each month when a woman is most likely to get pregnant.
Her doctor helped her figure out her fertile window to plan a pregnancy.
OTHER MEANINGS
2. In fertility tracking apps, the highlighted days predicted by an algorithm as the best chance to conceive.
The app marked three days as her fertile window based on past cycles.
3. A period of time favorable for growth or success in a broader sense.
Spring is the fertile window for planting new crops.
4. The span in a breeding season when animals can successfully mate.
Researchers observed the fertile window of the endangered birds.