Natural vs synchronized estrus: determinants of successful pregnancy in ewes using frozen-thawed Suffolk semen |
Rahman, Md. Mahbubur
(Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University)
Naher, Nazmun (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) Isam, Md. Mofijul (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) Hasan, Moinul (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) Naznin, Farhana (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) Bhuiyan, Mohammad Musharraf Uddin (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) Bari, Farida Yeasmin (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) Juyena, Nasrin Sultana (Department of Surgery and Obstetrics, Faculty of Veterinary Science, Bangladesh Agricultural University) |
1 | Bhuiyan AKFH. 2006. Livestock genetic resources in Bangladesh: Preservation and Management. International conference on livestock services, Chinese Academy of Agricultural Science 16-20. |
2 | DLS. 2019. Livestock Economy at a Glance 2018-2019. Directoate of Livestock Services, Ministry of Fisheries and Livestock, Government of the People's Republic of Bangladesh. Available at https://dls.portal.gov.bd/sites/default/files/files/dls.portal.gov.bd/page/ee5f4621_fa3a_40ac_8bd9_898fb8ee4700/Updated%20Livestock%20Economy%20%20%282018-2019%29.doc. |
3 | Donovan A, Hanrahan JP, Kummen E, Duffy P, Boland MP. 2004. Fertility in the ewe following cervical insemination with fresh or frozen-thawed semen at a natural or synchronised oestrus. Anim. Reprod. Sci. 84:359‐368. DOI |
4 | Fehring RJ. 1996. A comparison of the ovulation method with the CUE ovulation predictor in determining the fertile period. J. Am. Acad. Nurse Pract. 8:461‐466. DOI |
5 | Fukui Y, Kohno H, Okabe K, Katsuki S, Yoshizawa M, Togari T, Watanabe H. 2010. Factors affecting the fertility of ewes after intrauterine insemination with frozen-thawed semen during non-breeding season. J. Reprod. Dev. 56:460-466. DOI |
6 | Ginther OJ, Gastal EL, Gastal MO, Beg MA. 2005. Regulation of circulating gonadotropins by the negative effects of ovarian hormones in mares. Biol. Reprod. 73:315‐323. DOI |
7 | Gonzalez A, Murphy BD, Foote WC, Ortega E. 1992. Circannual estrous variations and ovulation rate in Pelibuey ewes. Small Rumin. Res. 8:225-232. DOI |
8 | Gupta KA and Purohit GN. 2001. 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 56:235‐245. DOI |
9 | Halbert GW, Dobson H, Walton JS, Sharpe P, Buckrell BC. 1990. Field evaluation of a technique for transcervical intrauterine insemination of ewes. Theriogenology 33:1231-1243. DOI |
10 |
Hackett AJ and Hidiroglou M. 1983. Effects of PMSG on progesterone levels in ewes treated with fluorogestone acetate or prostaglandin F2 |
11 | Harun-Or-Rashid M, Sarkar AK, Hasan MMI, Hasan M, Juyena NS. 2019. Productive, reproductive, and estrus characteristics of different breeds of buffalo cows in Bangladesh. J. Adv. Vet. Anim. Res. 6:553‐560. DOI |
12 | Hill JR, Thompson JA, Perkins NR. 1998. Factors affecting pregnancy rates following laparoscopic insemination of 28,447 Merino ewes under commercial conditions: a survey. Theriogenology 49:697‐709. DOI |
13 | Horoz H, Kasikci G, Ak K, Aklan S, Sonmez C. 2003. Controlling the breeding season using melatonin and progestagen in Kivircik ewes. Turk. J. Vet. Anim. Sci. 27:301-305. |
14 | Leethongdee S, Khalid M, Bhatti A, Ponglowhapan S, Kershaw CM, Scaramuzzi RJ. 2007. The effects of the prostaglandin E analogue Misoprostol and follicle-stimulating hormone on cervical penetrability in ewes during the peri-ovulatory period. Theriogenology 67:767‐777. DOI |
15 | Kershaw CM, Scaramuzzi R, Pitsillides AA, Wheeler-Jones CPD, McGowan MR, Khalid M. 2005. Changes in the cervical extracellular matrix of the sheep during the oestrous cycle. In: Biennial Joint Meeting of the UK Fertility Societies, Programme and Abstract Book, University of Warwick, Coventry UK, pp. 54. |
16 | Kusakari N, Ohara M, Mori Y. 1995. Seasonal variation in the timing of estrous behavior, LH surge and ovulation following the treatment with progesterone and PMSG in Suffolk ewes. J. Reprod. Dev. 41:249-254. DOI |
17 | Kusina NT, Tarwirei, Hamudikuwanda H, Agumba G, Mukwena J. 2000. A comparison of the effects of progesterone sponges and ear implants, PGF2alpha, and their combination on efficacy of estrus synchronization and fertility of Mashona goat does. Theriogenology 53:1567‐1580. DOI |
18 | Kwon DJ, Im SK, Kim H, Lee HK, Song KD. 2017. Estrus synchronization and pregnancy rate using ovsynch method in Uganda dairy farms. J. Emb. Trans. 32:159-163. DOI |
19 | Langford GA, Marcus GJ, Batra TR. 1983. Seasonal effects of PMSG and number of inseminations on fertility of progestogen-treated sheep. J. Anim. Sci. 57:307‐312. DOI |
20 | Lim HJ and Yoon HB. 2018. Investigation of relation between the ovulation confirmation and conception rate in dairy cattle. J. Emb. Trans. 33:55-59. DOI |
21 | Noakes DE. 2001. Normal oestrous cycles. In: Noakes DE, Parkinson TJ, England GCW, Arthur GH. (Eds.), Arthur's Veterinary Reproduction and Obstetrics. Saunders, London, pp. 3. |
22 | Rashidi M and Cedden F. 2013. Trans-cervical artificial insemination in ewes during out of breeding season. Maced. J. Anim. Sci. 3:143-146. |
23 | Rezac P. 2008. Potential applications of electrical impedance techniques in female mammalian reproduction. Theriogenology 70:1‐14. DOI |
24 | Salamon S and Maxwell WMC. 1995. Frozen storage of ram semen II. Causes of low fertility after cervical insemination and methods of improvement. Anim. Reprod. Sci. 38:1-36. DOI |
25 | Talukder MRI, Hasan M, Rosy TA, Bari FY, Juyena NS. 2018. Monitoring vaginal electrical resistance, follicular waves, and hormonal profile during oestrous cycle in the transition period in Bangladeshi sheep. J. Vet. Res. 62:571‐579. DOI |
26 | Windsor DP. 1995. Factors influencing the success of transcervical insemination in Merino ewes. Theriogenology 43:1009‐1018. DOI |
27 | Theodosiadou E, Amiridis GS, Tsiligianni T. 2014. Relationship between electrical resistance of cervical mucus and ovarian steroid concentration at the time of artificial insemination in ewes. Reprod. Biol. 14:234‐237. DOI |
28 | Timurkan H and Yildiz H. 2005. Synchronization of oestrus in Hamadani ewes. The use of different PMSG doses. Bull. Vet. Inst. Pulawy. 49:311-314. |
29 | Tsiligianni T. 2017. Induction of oestrus in ewes of the rare Greek breeds Skopelos, Zakynthos, Kymi- electrical resistance of cervical mucous. J. Hellenic Vet. Med. Soc. 65:23-30. DOI |
30 | Yenikoye A. 1984. [Annual variations in estrual behavior, rate and possibilities for ovulation in Peulh ewes from Niger]. Reprod. Nutr. Dev. 24:11-19. French. DOI |
31 | Bartlewski PM, Beard AP, Cook SJ, Chandolia RK, Honaramooz A, Rawlings NC. 1999. Ovarian antral follicular dynamics and their relationships with endocrine variables throughout the oestrous cycle in breeds of sheep differing in prolificacy. J. Reprod. Fertil. 115:111‐124. DOI |
32 | Arroyo LJ, Gallegos-Sanchez J, Villa-Godoy A, Berruecos JM, Perera G, Valencia J. 2007. Reproductive activity of Pelibuey and Suffolk ewes at 19 degrees north latitude. Anim. Reprod. Sci. 102:24‐30. DOI |
33 | Barsuren E, Kim SH, Lee HJ, Yoon JT. 2019. Effect of embryo transfer seven days after artificial insemination with sexed and conventional semen from superovulated cattle. J. Anim. Reprod. Biotechnol. 34:106-110. DOI |
![]() |