Pregnancy data of the seven gestations.

No. = number of the respective pregnancies; ID of the respective queen; given is the real parturition date and the date which was predicted from the reference data from the preceding pregnancies, also the time interval between successive pregnancies (numbers in brackets are the interval after founding the colony); exams = number of ultrasonographic examinations per pregnancy; res = number of embryonic resorptions detected in ultrasonographic exams; em = initial minimal number of embryos before resorption; LS = litter size; sex = sexratio of the offspring; % = survival rate.