Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2008.1750.1753AissiA. SlimaniC. 1220081113Ultrasonographic examinations of 10 pregnant bitches
with known breeding dates were made on successive days to establish the
identifiable characteristics of pregnancy. Subsequent serial examinations
were made to sonographically characterize normal canine prenatal development
based about the first mating. The initial detection of the fetal and extra-fetal
structures were as follows: gestational sac at day 17.88 ±1.13
(16-21); zonary placenta in the uterine wall at day 23.70 ±0.78
(23-25); embryo initial detection at day 22.80 ±1.03 (21-24); heartbeat
at day 23.0 ±0.94 (22-24); yolk sac membrane at day 24.8 ±0.78
(24-26); amnionic membrane at day 26.81 ±0.60 (26-28); fetal movement
at day 30.40 ±1.64 (28-32); stomach at day 33.40 ±1.07 (32-35);
urinary bladder at day 34.90 ±1.19 (33-37); skeleton at day 35.10
±0.73 (34-36).]]>Aissi, A., N. Alloui, C. Slimani and S. Touri,20087607611Bang, S.K. and H.S. Chang,20078289293Boyd, J.S., J.P. Renton, M.J. Harvey, D.A. Nickson, P.D. Eckersall and J.M. Ferguson,199347101105Concannon, P., T. Tsutsui and V. Shille,200157169179England, G.C.W. and E.W. Allen,199031321323England, G.C.W. and D.J. Porter,199031324329England, G.C.W. and A.E. Yeager,199347107117Holst, P.A. and R.D. Phemister,197435401406Luvoni, G.C. and A. Grioni,200041292294Luvoni, G.C. and M. Beccaglia,2006412732Moriyoshi, M., Y. Waki, T. Nakao and K. Kawata,199658443445Kang, B.K., H.S. Choi, C.H. Son, C.R. Shin, D.H. Seo and I.C. Park,199714279286Ko, J.S., B.S. Kim, S.A. Lee, Y.T. Cho, J.P. Kim, K.S. Oh, S.H. Kim, J.T. Kim, I.C. Park, Y.H. Kim and C.H. Son,2004212934Pharr, J.W. and K. Post,1992333540Son, C.H., K.A. Jeong, J.H. Kim, I.C. Park, S.H. Kim and C.S. Lee,200163715721Yeager, A.E. and P.W. Concannon,199034655665Yeager, A.E., H.O. Mohammed, V. Meyers-Wallen, L. Vannerson and P.W. Concannon,199253342351