01557naa a2200253 a 450000100080000000500110000800800410001910000210006024501340008126000090021552007970022465000240102165000180104565000270106365000100109065000170110065000100111765000170112765000270114465000310117165300120120270000160121477300730123015212722023-05-05       1966    bl uuuu     u00u1 u    #d1 aROWSON, L. E. A.  aEmbryo transfer in the sheepbthe significance of synchronizing oestrus in the donor and recipient animal.h[electronic resource]  c1966  aAbstract: Morulae and blastocysts obtained from ewes 5, 7 and 9 days after oestrus were transferred to 120 recipients whose oestrous cycles were either synchronized or \m=+-\2 or 3 days out ofphase relative to the onset of oestrus in the donors. When synchronization was exact 75% of all recipients became pregnant. A high proportion of pregnancies were, in general, also obtained where the onset ofoestrus in the recipient differed from that of the donor by \m=+-\2days. With a difference of \m=+-\3 days, however, only 8 % of ewes became pregnant. The survival of 5-day morulae transferred to 7-day recipients was lower than when 9-day blastocysts were transferred to 11-day recipients. The results are discussed with reference to possible factors associated with early embryonic mortality.  aEmbryonic mortality  aEstrous cycle  aEstrus synchronization  aSheep  aCiclo Estral  aOvino  aReprodução  aSincronização do Cio  aTransferência de Embrião  aOestrus1 aMOOR, R. M.  tJournal Reproduction Fertilitygv. 11, n. 2, p. 207-212, Apr., 1966.