Fecundity is synonymous with fertility; it means the capacity to produce numerous offspring.
Fecundity is being fertile.

In theory, you can't since you got your period which means that the zygote did not settle or the ovule was never fecundate. However, this is kinda weird since there is, for all women (and girls) exactly 14 days between the release of the ovule and the start of the period.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 4 words with the pattern FE-----TE. That is, nine letter words with 1st letter F and 2nd letter E and 8th letter T and 9th letter E. In alphabetical order, they are:

fecundate

fertigate

festinate

feuillete

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 9 words with the pattern F-C-----E. That is, nine letter words with 1st letter F and 3rd letter C and 9th letter E. In alphabetical order, they are:

faceplate

facsimile

factitive

factorage

factorise

factorize

feculence

fecundate

focusable

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 3 words with the pattern F---ND--E. That is, nine letter words with 1st letter F and 5th letter N and 6th letter D and 9th letter E. In alphabetical order, they are:

farandine

farandole

fecundate