This pilot study demonstrates the use of multiphasic analysis of non-return data to study effects of inbreeding on conception rate, calving rate and calving rate given conception when only non-return data is available. The results indicate that inbreeding of the cow mainly affects late embryonic mortality while inbreeding of the embryo mainly affects foetal mortality. However, interpretation of...

The relationship between previous use of oral contraceptives (OCs) and postdatism was investigated in 1496 women attending an antenatal clinic in a 7-month period in 1981. Postdatism was defined as spontaneous labor and delivery 14 or more days beyond the expected date of delivery as calculated by Naegele's rule (i.e., 9 months plus 1 week from the last menstrual period). 186 of the women rep...

Vinkler A., E. Kudlac, A. J ii'icek: Some Factors Influencing the Results of Conception in Cows and Heifers in Estrus Synchronized by the Synthetic Analogue of PGF2<x Cloprostenol. Acta vet. Brno, 51, 1982: 81-89. A study of the contribution of the breeding bull, the work of the operator and the influence of the size of the synchronized group on the conception rate in breeding cows after a firs...

The aim of this study was to investigate the effects of catalase and pre-freezing equilibration during ram sperm cryopreservation on motility and membrane and acrosomal integrity of frozen-thawed semen, as well as conception rate following laparoscopic timedinsemination. Semen was collected from four mature Dorper rams, pooled and diluted in Tris egg-yolk extender basic solution (CON), or this ...