title: The effect of the stage of the oestrous cycle and exogenous sex steroids on the transport of starch grains through the genital tract of the ewe, a preliminary study.
abstract: The starch grain test was studied in two ewes to determine the effect of the stage of the oestrous cycle on their transport through the Fallopian tubes. There was very little difference when the test was performed at oestrus or day 10 of the oestrous cycle. Bilateral ovariectomy had very little effect on the transport of starch grains. When progesterone in oil was administered by intramuscular injection to a bilaterally ovariectomised ewe and an intact ewe there was a marked increase in the number of grains which were recovered. Oestradiol benzoate in oil delayed the recovery of grains and reduced their numbers.
authors.affiliation: Department of Surgery and Obstetrics, The Royal Veterinary College, Hawkshead House, Hawkshead Lane, North Mymms, Hatfield, Herts, U.K.
authors.forename: B M
authors.initials: BM
authors.lastname: Kessy
authors.forename: D E
authors.initials: DE
authors.lastname: Noakes