The thing that differentiates bleeding due to implantation and bleeding due to periods is theimplantation bleeding color as explained above. Implantation Bleeding vs. Period. There is little difference between menstruation and implantation bleeding to begin with and the first couple of days can be very confusing.
Ducks can spend a week laying eggs.. the timer for hatching does not begin until they actually begin to sit or brood.. Fertile eggs can be laid and sit and be fine with no mom on them. as long as they dont freeze.
We have a mama duck that layed some eggs up in the eaves of our barn ( very hard place to get to ) last year... we think two of them hatched because we found two baby chicks in the yard ( there was another nest by the pond though but we think the babies came from the ones in the barn ) - but the rest of the eggs never hatched even though she sat on ...