wēi​xiǎn​qī

critical period

危险期 危險期 wēi​xiǎn​qī
critical period
A period of time marked by danger or high risk; particularly the time during an illness or emergency when a patient's survival is uncertain.
fertile period
The time in a woman's menstrual cycle when conception is most likely to occur, often referred to in the context of natural family planning.

Frequency

Movie subtitles
0.390 per million appears in 0% of films
Written text
0.712 per million

Sources