
TY  - JOUR
A1  - Tilbrook, AJ 
A1  - Pearce, DT 
T1  - Time Required for Spermatozoa to Remain in the Vagina of the Ewe to Ensure Conception
JF  - Australian Journal of Biological Sciences
JO  - Aust. Jnl. Of Bio. Sci.
Y1  - 1986
VL  - 39
IS  - 3
SP  - 305
EP  - 310
KW  - 
UR  - https://doi.org/10.1071/BI9860305 
N2  - Oestrous ewes (N = 202) were inseminated with O· I ml of semen containing 500 X 106 motile spermatozoa and the spermatozoa were flushed from their vaginae either immediately or 0'25, 0'5, I, 2, 4 and 8 h after insemination. Pregnancy was determined by returns to service and laparoscopy. Some ewes became pregnant (l0' 71 %) after spermatozoa had been flushed from the vagina only seconds after insemination and about 40% of ewes became pregnant after spermatozoa had been in the vagina for 15 min. Maximum conception (55%) was achieved when spermatozoa had been in the vagina for at least 2 h. It was concluded that the losses of spermatozoa that occur from the vagina will not influence the chance of a ewe conceiving because sufficient spermatozoa to ensure a normal conception move up the reproductive tract before large losses from the vagina take effect. 
ER  -

