DIRECTIONAL FLOW OF FALLOPIAN TUBE SECRETION IN THE EWE AT ONSET OF THE BREEDING SEASON

摘要: The secretion of fluid in the Fallopian tube is greatest about oestrus and diminishes during luteal phase cycle (e.g. Perkins, Goode, Wilder & Henson, 1965). Cannulation both ends ewe volumetric collection has shown that most flowed through ampullar orifice, but there was marked increase flow tubo-uterine junction 4 days after onset (Bellve McDonald, 1968). With ovariectomized injected with oestrogen, peak preceded end (McDonald Bellve, 1969). mechanism which prevents a similar premature surge isthmic intact pre-ovulatory period, when oestrogen dominance (Moore, Barrett, Brown, Schindler, Smith Smyth, 1969) obscure, progesterone from corpus luteum previous ovulation may have regulatory r\l=o^\le.Nevertheless, spayed sequentially treated not effectively restricted relative to transition anoestrous season breeding convenient time at examine direction animal occurs absence `waning' luteum. Six, 5-year-old, Romney ewes were used March April 1967, ensuring laparotomy no corpora lutea initially present ovaries. Vaginal smears taken daily, stained assessed by method Robinson Moore (1956) for evidence ovarian activity. Insertion cannulae into (ampullar) uterine (isthmic) each daily tubai as described Bellve McDonald (1968). Fluid collected until approach third ovulatory period (second oestrus) season, slaughtered ovaries recovered. Each set showed two distinct generations their morphological appearance indicated they result ovulations judged changes seen vaginal fluctuations output fluid. first usually unaccompanied