WordNet
n. the time in the menstrual cycle when fertilization is most likely to be possible (7 days before to 7 days after ovulation) [syn: fertile phase]
Usage examples of "fertile period".
However, all these bird species differ from us in that ovula-tion is advertised, female receptivity and the sex act are mostly confined to the fertile period around ovulation, sex is not recreational, and economic cooperation between pairs is slight or nonexistent.
Now, the fertile period in females is short, just six years, and the maximum number of children she can produce is three.
We might search your germ plasm throughout your entire fertile period and never come across two gametes that could be combined in this combination.
Between Botany days and the elapse of time on the Catteni trip, she couldn't figure out if she was in a fertile period or not.