The following information gathered from http://www.schaferhund.com
This calendar is from her L litter in 2006.
Wed 2 Nov 2005 First day of mating.
48 hours after the first mating the bitch should be mated again. Subsequent matings occurring over a period of time enhance the chances of fertilization taking place. The spermatozoa migrate up through the cervix.
Thu 3 [...]