Monitoring vaginal electrical resistance, follicular waves, and hormonal profile during oestrous cycle in the transition period in Bangladeshi sheep

1. Baird D.T., Campbell B.K., Mann G.E., McNeilly A.S.: Inhibin and estradiol in the control of FSH secretion in the sheep. J Reprod Fertil 1991, 43, 125–138.Search in Google Scholar

2. Baird D.T., Land R.B., Scaramuzzi R.J., Wheeler A.G.: Endocrine changes associated with luteal regression in the ewe; the secretion of ovarian estradiol, progesterone and androstenedione and uterine prostaglandin F2α throughout the oestrous cycle. J Endocrinol 1976, 69, 275–286.10.1677/joe.0.0690275Search in Google Scholar

3. Baird D.T.: Pulsatile secretion of LH and ovarian estradiol during the follicular phase of the sheep estrous cycle. Biol Reprod 1978, 18, 359–364.10.1095/biolreprod18.3.359Search in Google Scholar

4. Bartlewski P.M., Beard A.P., Cook S.J., Chandolia R.K., Honaramooz A., Rawlings N.C.: Ovarian antral follicular dynamics and their relationships with endocrine variables throughout the oestrous cycle in breeds of sheep differing in prolificacy. J Reprod Fertil 1999, 115, 111–124.10.1530/jrf.0.1150111Search in Google Scholar

5. Bartlewski P.M., Beard A.P., Cook S.J., Rawlings N.C.: Ovarian follicular dynamics during anoestrous in ewes. J Reprod Fertil 1998, 113, 275–285.10.1530/jrf.0.1130275Search in Google Scholar

6. Bister J.L., Noel B., Perrad B., Mandiki S.N., Mbayahaga J., Paquay R.: Control of ovarian follicles activity in the ewe. Domest Anim Endocrinol 1999, 17, 315–328.10.1016/S0739-7240(99)00047-8Search in Google Scholar

7. Cahill L.P., Mauleon P.: A study of the population of primordial and small follicles in the sheep. J Reprod Fertil 1981, 61, 201–206.10.1530/jrf.0.0610201Search in Google Scholar

8. Campbell B.K., Scaramuzzi R.J., Webb R.: Control of antral follicle development and selection in sheep and cattle. J Reprod Fertil 1995, 49, 335–350.Search in Google Scholar

9. Campbell L.B.K., Mann G.E., McNeilly A.S., Baird D.T.: The pattern of ovarian inhibin, estradiol and androstenedione secretion during the estrous cycle of the ewe. J Endocrinol 1990, 127, 227–235.10.1210/endo-127-1-227Search in Google Scholar

10. Duggavathi R., Bartlewski P.M., Barrett D.M.W., Rawlings N.C.: Use of high-resolution transrectal ultrasonography to assess changes in numbers of small ovarian follicles and their relationships to the emergence of follicular waves in cyclic ewes. Theriogenology 2004, 60, 495–610.10.1016/S0093-691X(03)00041-4Search in Google Scholar

11. Evans A.C., Duffy P., Hynes N., Boland M.P.: Waves of follicle development during the estrous cycle in sheep. Theriogenology 2000, 53, 699–715.10.1016/S0093-691X(99)00268-XSearch in Google Scholar

12. Fehring R.J.: A comparison of the ovulation method with the CUE ovulation predictor in determining fertile period. J Am Acad Nurse Pract 1997, 8, 461–466.10.1111/j.1745-7599.1996.tb00604.x9305046Search in Google Scholar

13. Findlay J.K., Clarke I.J. Robertson D.M.: Inhibin concentrations in ovarian and jugular venous plasma and the relationship of inhibin with follicle-stimulating hormone and luteinizing hormone during the ovine estrous cycle. Endocrinology 1990, 126, 528–35.10.1210/endo-126-1-5282104590Search in Google Scholar

14. Fortune J.E.: Follicular dynamics during the bovine estrous cycle: a limiting factor in improvement of fertility? Anim Reprod Sci 1993, 33, 111–125.10.1016/0378-4320(93)90110-DSearch in Google Scholar

15. Ginther O.J., Kot K., Wiltbank M.C.: Associations between emergence of follicular waves and fluctuations in FSH concentrations during the estrous cycle in ewes. Theriogenology 1995, 43, 689–703.10.1016/0093-691X(94)00074-5Search in Google Scholar

16. Gupta K.A., Purohit G.N.: Use of vaginal electrical resistance (VER) to predict estrus and ovarian activity, its relationship with plasma progesterone and its use for insemination in buffaloes. Theriogenology 2001, 56, 235–245.10.1016/S0093-691X(01)00559-3Search in Google Scholar

17. Hasan M., Miah M.A.H., Rosy T.A., Jha P.K., Juyena N.S.: Serum testosterone concentration in surgically castrated Black Bengal bucks. The Bangladesh Veterinarian 2016, 33, 71–77.10.3329/bvet.v33i2.36460Search in Google Scholar

18. Kennedy D.: Sheep Reproduction Basics and Conception Rates. OMAF factsheet, Queen’s Printer for Ontario, Ontario, Canada 2012. www.omafra.gov.on.ca/english/livestock/sheep/facts/12-037.htmSearch in Google Scholar

19. Lyimo Z.C., Nielen M., Ouweltjes W., Kruip T.A., van Eerdenburg F.J.: Relationship among estradiol cortisol and intensity of estrous behavior in dairy cattle. Theriogenology 2000, 53, 1783–1795.10.1016/S0093-691X(00)00314-9Search in Google Scholar

20. McNeilly A.S.: Changes in FSH and the pulsatile secretion of LH duiring the delay in oestrous induced by treatments of ewes with bovine follicular fluid. J Reprod Fertil 1984, 72, 165–172.10.1530/jrf.0.0720165Search in Google Scholar

21. Menegatos J., Chadio S., Kalogiannis T., Kouskoura T., Kouimtzis S.: Endocrine events during the periestrous period and the subsequent estrous cycle in ewes after estrus synchronization. Theriogenology 2003, 59, 1533–1543.10.1016/S0093-691X(02)01205-0Search in Google Scholar

22. Ravindra J.P., Rawlings N.C., Evans A.C., Adams G.P.: Ultrasonographic study of ovarian follicular dynamics in ewes during the oestrous cycle. J Reprod Fertil 1994, 101, 501–509.10.1530/jrf.0.10105017932387Search in Google Scholar

23. Schrick F.N., Surface R.A., Pritchard J.Y., Dailey R.A., Townsend E.C., Inskeep E.K.: Ovarian structures during the estrous cycle and early pregnancy in ewes. Biol Reprod 1993, 49, 1133–1140.10.1095/biolreprod49.5.11338286581Search in Google Scholar

24. Seekallu S.V., Toosi B.M., Duggavathi R., Barrett D.M.W., Davies K.L., Waldner C., Rawlings N.C.: Ovarian antral follicular dynamics in sheep revisited: comparison among estrous cycles with three or four follicular waves. Theriogenology 2010, 73, 670–680.10.1016/j.theriogenology.2009.11.00720034659Search in Google Scholar

25. Souza C.J., Campbell B.K., Baird D.T..: Follicular dynamics and ovarian steroid secretion in sheep during the follicular and early luteal phases of the estrous cycle. Biol Reprod 1997, 56, 483–488.10.1095/biolreprod56.2.483Search in Google Scholar

26. Souza C.J., Campbell B.K., Baird D.T.: Follicular waves and concentrations of steroids and inhibin A in ovarian venous blood during the luteal phase of the oestrous cycle in ewes with an ovarian autotransplant. J Endocrinol 1998, 156, 563–572.10.1677/joe.0.1560563Search in Google Scholar

27. Tasal I., Ataman M.B., Aksoy M., Kaya A., Karaca F., Tekeli T.: Estimation of early pregnancy by electrical resistance values of vaginal mucosa in cows and heifers. Rev Med Vet 2005, 15, 691–694.Search in Google Scholar

28. Vinoles C., Forsberg M., Banchero G., Rubianes E.: Effect of long-term and short-term progestagen treatment on follicular development and pregnancy rate in cyclic ewes. Theriogenology 2001, 55, 993–1004.10.1016/S0093-691X(01)00460-5Search in Google Scholar

29. Zieba D.A., Murawski M., Wierzchos E.: Pattern of follicular development during the oestrous cycle of prolific Olkuska sheep. Arch Tierzucht 2001, 44, 203–212.Search in Google Scholar

30. Zohara B.F., Azizunnesa, Islam M.F., Alam M.G.A., Bari F.Y.: Exfoliative vaginal cytology and serum progesterone during the estrous cycle of indigenous ewes in Bangladesh. J In Vitro Fert Embryo Transf 2014, 29, 183–188.10.12750/JET.2014.29.2.188Search in Google Scholar