In the various families and towns I have looked at for my family in Tarnopol and Stanislawow for just about every set of parents for whom I have found marriage records and records for the births of their children the marriage record is dated prior to the birth dates of the children, as one would generally expect. However, in a handful of towns I have found quite a few situations where records for numerous children of one set of parents pre-date the record for the marriage of the parents. This, so far has been limited to the towns of Tłuste/Touste and Jezierzany and possibly Zalozce.
I am curious if the reason for this is that these were very small towns and the marriage registration may have occured significantly after the actual marriage- religious or otherwise- occured because either the town did not begin registering until later or the family moved to a bigger town and registered a previous marriage.
It seems unlikely that a set of parents in those types of communities in that era would have had multiple children out of wedlock??