[Abecia J.A., Forcada F., Palacín I. (2008). Effect of exogenous melatonin on the ovary, the embryo and the establishment of pregnancy in sheep. Animal, 2: 399-404.10.1017/S1751731107001383]Search in Google Scholar
[Abecia J.A., Forcada F., González-Bulnes A. (2012). Hormonal control of reproduction in small ruminants. Anim. Reprod. Sci., 130: 173-179.10.1016/j.anireprosci.2012.01.011]Search in Google Scholar
[Aharoni Y., Brosh A., Ezra E. (2000). Prepartum photoperiod effect on milk yield and composition in dairy cows. J. Dairy Sci., 83: 2779-2781.10.3168/jds.S0022-0302(00)75174-5]Search in Google Scholar
[Al-Katanani Y.M., Webb D.W., Hansen P.J. (1999). Factors affecting seasonal variation in 90 day non-return rate to first service in lactating Holstein cows in a hot climate. J. Dairy Sci., 82: 2611-2615.10.3168/jds.S0022-0302(99)75516-5]Search in Google Scholar
[Andreu-Vázquez C., Garcia-Ispierto I., López-Gatius F. (2012a). Photoperiod length and the estrus synchronization protocol used before AI affect the twin pregnancy rate in dairy cattle. Theriogenology, 78: 1209-1216.10.1016/j.theriogenology.2012.05.014]Search in Google Scholar
[Andreu-Vázquez C., Garcia-Ispierto I., Ganau S., Fricke P.M., López-Gatius F. (2012b). Effects of twinning on the subsequent reproductive performance and productive lifespan of high-producing dairy cows. Theriogenology, 78: 2061-2070.10.1016/j.theriogenology.2012.07.027]Search in Google Scholar
[Anwar M.J., Muhammad B.Y., Bader A.A., Abdulghani M., Mahmood D., Haider Mohammed. (2015). An insight into the scientific background and future perspectives for the potential uses of melatonin. Egypt. J. Basic Appl. Sci., 2: 139-152.10.1016/j.ejbas.2015.05.003]Search in Google Scholar
[Aoki M., Kimura K., Suzuki O. (2006). Influence of feeding regime on timing of parturition in beef cattle and the relationship of vaginal temperature to parturition. Anim. Sci. J., 77: 290-299.10.1111/j.1740-0929.2006.00351.x]Search in Google Scholar
[Arendt J. (1998). Melatonin and the pineal gland: influence on mammalian seasonal and circadian physiology. Rev. Reprod., 3: 13-22.10.1530/ror.0.0030013]Search in Google Scholar
[Auldist M.J., Turner S.A., McMahon C.D., Prosser C.G. (2007). Effects of melatonin on the yield and composition of milk from grazing dairy cows in New Zealand. J. Dairy Res., 74: 52-57.10.1017/S0022029906002160]Search in Google Scholar
[Barash H., Silanikove N., Shamay A., Ezra E. (2001). Interrelationships among ambient temperature, day length and milk yield in dairy cows under a Mediterranean climate. J. Dairy Sci., 84: 2314-2320.10.3168/jds.S0022-0302(01)74679-6]Search in Google Scholar
[Batıoglu A.S., Sahin U., Gürlek B., Oztürk N., Unsal E. (2012). The efficacy of melatonin administration on oocyte quality. Gynecol. Endocrinol., 28: 91-93.10.3109/09513590.2011.589925]Search in Google Scholar
[Bazer F.W., First N.L. (1983). Pregnancy and parturition. J. Anim. Sci., 57(Suppl. 2): 425-460.]Search in Google Scholar
[Bilbo S.D., Dhabhar F.S., Viswanathan K., Saul A., Yellon S.M., Nelson R.J. (2002). Short day lengths augment stress-induced leukocyte trafficking and stress-induced enhancement of skin immune function. PNAS, 99: 4067-4072.10.1073/pnas.062001899]Search in Google Scholar
[Bosc M.J., Duchamp G., Rodas E. (1988). Effect of inversion of the light-dark cycle on foaling time during the day in domestic horses. Ann. Zootech., 37: 111-116.10.1051/animres:19880205]Search in Google Scholar
[Brand J.M., Frohn C., Cziupka K., Brockmann C., Kirchner H., Luhm J. (2004). Prolactin triggers pro-inflammatory immune responses in peripheral immune cells. Eur. Cytokine Netw., 15: 99-104.]Search in Google Scholar
[Bubenik G.A. (2008). Thirty four years since the discovery of gastrointestinal melatonin. J. Physiol. Pharmacol., 59: 33-51.]Search in Google Scholar
[Cardinali D.P., Rosner J.M. (1971). Metabolism of serotonin by the rat retina “in vitro”. J. Neurochem., 18: 1769-1770.10.1111/j.1471-4159.1971.tb03752.x]Search in Google Scholar
[Carrillo-Vico A., Calvo J.R., Abreu P., Lardone P.J., García-Mauriño S., Reiter R.J., Guerrero J.M. (2004). Evidence of melatonin synthesis by human lymphocytes and its physiological significance: possible role as intracrine, autocrine, and/or paracrine substance. FASEB J., 18: 537-539.10.1096/fj.03-0694fje]Search in Google Scholar
[Cavallari de Castro F., Leal C.L., Roth Z., Hansen P.J. (2019) Effects of melatonin on production of reactive oxygen species and developmental competence of bovine oocytes exposed to heat shock and oxidative stress during in vitro maturation. Zygote, 27: 180-186.10.1017/S0967199419000236]Search in Google Scholar
[Cavestany D., El-Whishy A.B., Foote R.H. (1985). Effect of season and high environmental temperature on fertility of Holstein cattle. J. Dairy Sci., 68: 1471-1478.10.3168/jds.S0022-0302(85)80985-1]Search in Google Scholar
[Claustrat B., Brun J., Chazot G. (2005). The basic physiology and pathophysiology of melatonin. Sleep Med. Rev., 9: 11-24.10.1016/j.smrv.2004.08.001]Search in Google Scholar
[Crowe M.A. (2008). Resumption of ovarian cyclicity in post-partum beef and dairy cows. Reprod. Domest. Anim., 43 (Suppl. 5): 20-28.10.1111/j.1439-0531.2008.01210.x]Search in Google Scholar
[Dahl G.E., Petitclerc D. (2003). Management of photoperiod in the dairy herd for improved production and health. J. Anim. Sci., 81 (Suppl 3): 11-17.10.2527/2003.81suppl_311x]Search in Google Scholar
[Dahl G. E., Buchanan B.A., Tucker H.A. (2000). Photoperiodic effects on dairy cattle: A review. J. Dairy Sci., 83: 885-893.10.3168/jds.S0022-0302(00)74952-6]Search in Google Scholar
[Dahl G.E., Tao S., Thompson I.M. (2012). Lactation biology symposium: effects of photoperiod on mammary gland development and lactation. J. Anim. Sci., 90: 755–760.10.2527/jas.2011-4630]Search in Google Scholar
[Dardente H., Lomet D., Robert V., Pellicer-Rubio M. (2106). Seasonal breeding in mammals: From basic science to applications in back. Theriogenology, 86: 324-332.10.1016/j.theriogenology.2016.04.045]Search in Google Scholar
[De Rensis F., Garcia-Ispierto I., López-Gatius F. (2015). Seasonal heat stress: Clinical implications and hormone treatments for the fertility of dairy cows. Theriogenology, 84: 659-666.10.1016/j.theriogenology.2015.04.021]Search in Google Scholar
[De Rensis F., López-Gatius F., García-Ispierto I., Morini G., Scaramuzzi R.J. (2017). Causes of declining fertility in dairy cows during the warm season. Theriogenology, 91: 145-153.10.1016/j.theriogenology.2016.12.024]Search in Google Scholar
[Druckmann R., Druckmann, M.A. (2005). Progesterone and the immunology of pregnancy. J. Steroid Biochem. Mol. Biol. 97: 389-396.10.1016/j.jsbmb.2005.08.010]Search in Google Scholar
[Echternkamp S.E., Roberts A.J., Lunstra D.D., Wise T., Spicer L.J. (2004). Ovarian follicular development in cattle selected for twin ovulations and births. J. Anim. Sci., 82: 459-471.10.2527/2004.822459x]Search in Google Scholar
[El-Raey M., Geshi M., Somfai T., Kaneda M., Hirako M., Abdel-Ghaffar A.E., Sosa G.A., El-Roos M.E., Nagai T. (2011). Evidence of melatonin synthesis in the cumulus oocyte complexes and its role in enhancing oocyte maturation in vitro in cattle. Mol. Reprod. Dev., 78: 250-262.10.1002/mrd.21295]Search in Google Scholar
[Evans N.M., Hacker R.R. (1989). The chronobiological manipulation of time of calving behaviour of dairy cattle. Can. J. Anim. Sci., 69: 857-863.10.4141/cjas89-098]Search in Google Scholar
[Forde N., Beltman M.E., Lonergan P., Diskin M., Roche J.F., Crowe M.A. (2011). Oestrous cycles in Bos Taurus cattle. Anim. Reprod. Sci., 124: 163-169.10.1016/j.anireprosci.2010.08.025]Search in Google Scholar
[Garbayo J.M., Serrano B., Lopez-Gatius F. (2008). Identification of novel pregnancy-associated glycoproteins (PAG) expressed by the peri-implantation conceptus of domestic ruminants. Anim. Reprod. Sci., 103, 120-134.10.1016/j.anireprosci.2006.12.002]Search in Google Scholar
[García-Ispierto I., López-Gatius F., Bech-Sabat G., Santolaria P., Yániz J.L., Nogareda C., De Rensis F., López-Béjar M. (2007). Climate factors affecting conception rate of high producing dairy cows in northeastern Spain. Theriogenology, 67: 1379-1385.10.1016/j.theriogenology.2007.02.009]Search in Google Scholar
[Garcia-Ispierto I., Lopez-Gatius F., Almeria S., Yániz J., Santolaria P., Serrano B., Bech-Sàbat G., Nogareda C., Sulon J., de Sousa N.M., Beckers J.F. (2009). Factors affecting plasma prolactin concentrations throughout gestation in high producing dairy cows. Domest. Anim. Endocnology, 36: 57-66.10.1016/j.domaniend.2008.10.004]Search in Google Scholar
[García-Ispierto I., Abdelfatah A., López-Gatius F. (2013). Melatonin treatment at dry-off improves reproductive performance postpartum in high-producing dairy cows under heat stress conditions. Reprod. Domest. Anim., 48: 577-583.10.1111/rda.12128]Search in Google Scholar
[Hansen P.J. (1985). Seasonal modulation of puberty and the post-partum anestrus in cattle: a review. Liv.. Prod. Sci., 12: 309-327.10.1016/0301-6226(85)90131-9]Search in Google Scholar
[Hansen P.J. (2019). Reproductive physiology of the heat-stressed dairy cow: implications for fertility and assisted reproduction. Anim. Reprod., 16: 497-507.10.21451/1984-3143-AR2019-0053]Search in Google Scholar
[Hansen P.J., Kamwanja L.A., Hauser E.R. (1983). Photoperiod influences age at puberty of heifers. J. Anim. Sci., 57: 985-992.10.2527/jas1983.574985x]Search in Google Scholar
[Hardeland R., Cardinali D.P., Srinivasan V., Spence D.W., Brown G.M., Pandi-Perumal SR. (2011). Melatonin-A pleiotropic, orchestrating regulator molecule. Prog. Neurobiol., 93: 350-384.10.1016/j.pneurobio.2010.12.004]Search in Google Scholar
[Hashiyada Y. (2017). The contribution of efficient production of monozygotic twins to beef cattle breeding. J. Reprod. Dev., 63: 527-538.10.1262/jrd.2017-096]Search in Google Scholar
[Hedlund L.M., Lischko M., Rollag M.D., Niswender G.D. (1977). Melatonin: daily cycle in plasma and cerebrospinal fluid in calves. Science, 195: 686-687.10.1126/science.841305]Search in Google Scholar
[Itoh M.T., Ishizuka B., Kuribayashi Y., Amemiya A., Sumi Y. (1999). Melatonin, its precursors, and synthesizing enzyme activities in the human ovary. Mol. Human Reprod., 5: 402-408.10.1093/molehr/5.5.402]Search in Google Scholar
[Kavita, Phogat J.B., Pandey A.K., Balhara A.K., Ghuman S.S., Gunwant P. (2018). Effects of melatonin supplementation prior to Ovsynch protocol on ovarian activity and conception rates in anestrous Murrah buffalo heifers during out of breeding season. Reprod. Biol., 18: 161-168.10.1016/j.repbio.2018.03.001]Search in Google Scholar
[Kooijman R., Hooghe-Peters E.L., Hooghe R. (1996). Prolactin, growth hormone, and insulin-like growth factor-1 in the immune system. Adv. Immunol., 63: 377–454.10.1016/S0065-2776(08)60860-3]Search in Google Scholar
[Korf H.W. (2018). Signaling pathways to and from the hypophysial pars tuberalis, an important center for the control of seasonal rhythms. Gen. Comp. Endocrinol., 258: 236-243.10.1016/j.ygcen.2017.05.011]Search in Google Scholar
[Kumar A., Mehrotra S., Singh G., Maurya V.P., Narayanan K., Mahla A.S., Chaudhari R.K., Singh M., Soni Y.K., Kumawat B.L., Dabas S.K., Srivastava N. (2016). Supplementation of slow-release melatonin improves recovery of ovarian cyclicity and conception in summer anestrous buffaloes (Bubalus bubalis). Reprod. Domest. Anim., 51: 10-17.10.1111/rda.12639]Search in Google Scholar
[Labèrnia J., López-Gatius F., Santolaria P., Hanzen C., Laurent Y., Houtain J.Y. (1998). Influence of calving season on the interactions among reproductive disorders of dairy cows. Anim. Sci., 67: 387-393.10.1017/S1357729800032781]Search in Google Scholar
[Lacasse P., Vinet C.M., Petitclerc D. (2014). Effect of prepartum photoperiod and melatonin feeding on milk production and prolactin concentration in dairy heifers and cows. J. Dairy Sci., 97: 3589-3598.10.3168/jds.2013-7615]Search in Google Scholar
[Lanoix D., Beghdadi H., Lafond J., Vaillancourt C. (2008). Human placental trophoblasts synthesize melatonin and express its receptors. J. Pineal Res., 45: 50–60.10.1111/j.1600-079X.2008.00555.x]Search in Google Scholar
[Lanoix D., Lacasse A.A., Reiter R.J., Vaillancourt C. (2013). Melatonin: the watchdog of villous trophoblast homeostasis against hypoxia/reoxygenation-induced oxidative stress and apoptosis. Mol. Cell Endocrinol., 38: 35–45.10.1016/j.mce.2013.07.010]Search in Google Scholar
[Le Cozler Y., Lollivier V., Lacasse P., Disenhaus C. (2008). Rearing strategy and optimizing first-calving targets in dairy heifers: a review. Animal, 2: 1393-1404.10.1017/S1751731108002498]Search in Google Scholar
[Lerner A.B., Case J.D., Takahashi Y., Lee T.H., Mori W. (1958). Isolation of Melatonin, the pineal gland factor that lightens melanocytes. J. Am. Chem. Soc., 80: 2587.10.1021/ja01543a060]Search in Google Scholar
[Lerner A.B., Case J.D., Heinzelmann R.V. (1959). Structure of melatonin. J. Am. Chem. Soc., 81: 6084-6085.10.1021/ja01531a060]Search in Google Scholar
[Liggins G.C. (1982). The fetus and birth. In: Reproduction in Mammals: 2. Embryonic and Fetal Development. Austin CR, Short RV. (eds). Cambridge University Press, Cambridge, UK, pp. 115-141.]Search in Google Scholar
[Lincoln D.W, Porter D.G. (1976). Timing of the photoperiod and the hour of birth in rats. Nature, 260: 780-781.10.1038/260780a0]Search in Google Scholar
[Lincoln G.A. (1982). The pineal gland. In: Reproduction in Mammals: 3. Hormonal Control of Reproduction. Austin CR, Short RV. (eds). Cambridge University Press, Cambridge, UK, pp. 52-75.10.1017/CBO9781139167727.006]Search in Google Scholar
[López-Gatius F. (2003). Is fertility declining in dairy cattle? A retrospective study in northeastern Spain. Theriogenology, 60: 89-99.10.1016/S0093-691X(02)01359-6]Search in Google Scholar
[López-Gatius F., Garcia-Ispierto I. (2010). Ultrasound and endocrine findings that help to assess the risk of late embryo/early foetal loss by non-infectious cause in dairy cattle. Reprod. Domest. Anim., 45(Suppl 3): 15-24.10.1111/j.1439-0531.2010.01620.x]Search in Google Scholar
[López-Gatius F., Hunter R.H.F. (2018a). Fertility, fecundity and the creative instinct. J. Gynecol. Obstet. Hum. Reprod., 47: 581-582.10.1016/j.jogoh.2018.09.007]Search in Google Scholar
[López-Gatius F., Hunter R.H.F. (2018b). Puncture and drainage of the subordinate follicles at timed artificial insemination prevents the risk of twin pregnancy in dairy cows. Reprod. Domest. Anim., 53: 213-216.10.1111/rda.13094]Search in Google Scholar
[López-Gatius F., Hunter R.H.F. (2019). Preventing twin pregnancies in dairy cattle, turning the odds into reality. Liv. Sci., 229: 1-3.10.1016/j.livsci.2019.09.004]Search in Google Scholar
[López-Gatius F., Hunter R.H., Garbayo J.M., Santolaria P., Yaniz J., Serrano B., Ayad A., De Sousa N.M., Beckers J.F. (2007). Plasma concentrations of pregnancy-associated glycoprotein-1 (PAG-1) in high producing dairy cows suffering early fetal loss during the warm season. Theriogenology, 67: 1324-1330.10.1016/j.theriogenology.2007.02.004]Search in Google Scholar
[López-Gatius F., Andreu-Vázquez C., Mur-Novales R., Cabrera V.E., Hunter R.H.F. (2017). The dilemma of twin pregnancies in dairy cattle. A review of practical prospects. Liv. Sci., 197: 121-126.10.1016/j.livsci.2017.01.001]Search in Google Scholar
[López-Gatius F., Garcia-Ispierto I., Serrano-Pérez B., Balogh O.G., Gabor G., Hunter R.H.F. (2019). Luteal activity following follicular drainage of subordinate follicles for twin pregnancy prevention in bi-ovular dairy cows. Res. Vet. Sci., 124: 439-443.10.1016/j.rvsc.2019.05.006]Search in Google Scholar
[Lowman B.G., Hankey M.S., Scott N.A., Deas D.W., Hunter E.A. (1981). Influence of time of feeding on time of parturition in beef cows. Vet. Rec., 109: 557–559.]Search in Google Scholar
[Makarechian M. (1984). Factors influencing time of parturition in range beef cattle. Can. Vet. J., 25: 450-452.]Search in Google Scholar
[Maldonado M.D., Murrillo-Cabezas F., Terron M.P., Flores L.J., Tan D.X., Manchester L.C., Reiter R.J. (2007). The potential of melatonin in reducing morbidity-mortality after craniocerebral trauma. J. Pineal Res., 42: 1–11.10.1111/j.1600-079X.2006.00376.x]Search in Google Scholar
[Malpaux B., Viguie C., Skinner D.C., Thiery A.C., Pelletier J., Chemineau P. (1996). Seasonal breeding in sheep: mechanism of action of melatonin. Anim. Reprod. Sci., 42: 109-117.10.1016/0378-4320(96)01505-9]Search in Google Scholar
[Markusfeld O., Galon N., Ezra E. (1997). Body condition score, health, yield and fertility in dairy cows. Vet. Rec., 141: 67-72.10.1136/vr.141.3.67]Search in Google Scholar
[Marques T.C., da Silva Santos E.C., Diesel T.O., Leme L.O., Martins C.F., Dode M., Alves B.G., Costa F., de Oliveira E.B., Gambarini M.L. (2018). Melatonin reduces apoptotic cells, SOD2 and HSPB1 and improves the in vitro production and quality of bovine blastocysts. Reprod. Domest. Anim., 53: 226-236.10.1111/rda.13097]Search in Google Scholar
[McCord C.P., Allen F.P. (1917). Evidences associating pineal gland function with alterations in pigmentation. J. Exp. Zool., 23: 207-224.10.1002/jez.1400230108]Search in Google Scholar
[Mercier E., Salisbury G.W. (1947a). Seasonal variations in hours of daylight associated with fertility level of cattle under natural breeding conditions. J. Dairy Sci., 30: 747-756.10.3168/jds.S0022-0302(47)92395-3]Search in Google Scholar
[Mercier E., Salisbury G.W. (1947b). Fertility level in artificial breeding associated with season, hours of daylight, and the age of cattle. J. Dairy Sci., 30: 817-826.10.3168/jds.S0022-0302(47)92405-3]Search in Google Scholar
[Milczarek R., Hallmann A., Sokolowska E., Kaletha K., Klimek J. (2010). Melatonin enhances antioxidant action of alpha-tocopherol and ascorbate against NADPH- and iron-dependent lipid peroxidation in human placental mitochondria. J. Pineal Res., 49: 149–155.10.1111/j.1600-079X.2010.00779.x]Search in Google Scholar
[Mitchell J.A., Yochim, J.M. (1970). Influence of environmental lighting on duration of pregnancy in the rat. Endocrinology, 87: 472-48010.1210/endo-87-3-4725463818]Search in Google Scholar
[Mohawk J.A., Green C.B., Takahashi J.S. (2012). Central and peripheral circadian clocks in mammals. Annu. Rev. Neurosci., 35: 445-462.10.1146/annurev-neuro-060909-153128]Search in Google Scholar
[Morini G., Pitella M., Poli A., De Rensis F. (2018). Effect of melatonin administration prior to calving on milk secretion in the next lactation in dairy cows. Veterin. Stan., 49: 85-89.]Search in Google Scholar
[Nakamura Y., Tamura H., Takayama H., Kato H. (2003). Increased endogenous level of melatonin in preovulatory human follicles does not directly influence progesterone production. Fertil. Steril., 80: 1012–1016.10.1016/S0015-0282(03)01008-2]Search in Google Scholar
[Newbold J.A., Chapin L.T., Zinn S.A., Tucker H.A. (1991). Effects of photoperiod on mammary development and concentration of hormones in serum of pregnant dairy heifers. J. Dairy Sci., 74: 100-108.10.3168/jds.S0022-0302(91)78149-6]Search in Google Scholar
[Ott T.L. (2019). Symposium review: Immunological detection of the bovine conceptus during early pregnancy. J. Dairy Sci., 102: 3766-3777.10.3168/jds.2018-15668]Search in Google Scholar
[Pandi-Perumal S.R., Srinivasan V., Maestroni G.J.M., Cardinali D.P., Poeggeler B., Hardeland, R. (2006). Melatonin: nature’s most versatile biological signal? FEBS J., 273: 2813-2838.10.1111/j.1742-4658.2006.05322.x]Search in Google Scholar
[Papis K., Poleszczuk O., Wenta-Muchalska E., Modlinski J.A. (2007). Melatonin effect on bovine embryo development in vitro in relation to oxygen concentration. J. Pineal Res., 43: 321-326.10.1111/j.1600-079X.2007.00479.x]Search in Google Scholar
[Peter A.T., Vos P.L.A.M., Ambrose D.J. (2009). Postpartum anestrus in dairy cattle. Theriogenology, 71: 1333-1342.10.1016/j.theriogenology.2008.11.012]Search in Google Scholar
[Peters R.R., Chapin L.T., Emery R.S., Tucker H.A. (1980). Growth and hormonal response of heifers to various photoperiods. J. Anim. Sci., 51: 1148-1153.10.2527/jas1980.5151148x]Search in Google Scholar
[Pevet P., Klosen P., Felder-Schmittbuhl M.P. (2017). The hormone melatonin: Animal Studies. Best Pract. Res. Clin. Endocrinol. Metab., 31: 547-559.10.1016/j.beem.2017.10.010]Search in Google Scholar
[Prendergast B.J., Wynne-Edwards K.E.,Yellon S.M., Nelson R.J. (2002). Photorefractoriness of immune function in male Siberian hamsters (Phodopus sungorus). J. Neuroendocrinol., 14: 318-329.10.1046/j.1365-2826.2002.00781.x]Search in Google Scholar
[Raghupathy R. (1997). Th-1 immunity is incompatible with successful pregnancy. Immunol. Today, 18: 478-482.10.1016/S0167-5699(97)01127-4]Search in Google Scholar
[Reiter R.J. (1980). The pineal and its hormones in the control of reproduction in mammals. Endocrine Rev., 1: 109–131.10.1210/edrv-1-2-109]Search in Google Scholar
[Reiter R.J. (1991). Pineal melatonin: cell biology of its synthesis and of its physiological interactions. Endocrine Rev., 12: 151-180.10.1210/edrv-12-2-151]Search in Google Scholar
[Reiter R.J., Fraschini F. (1969). Endocrine aspects of the mammalian pineal gland: a review. Neuroendocrinology, 5:219-255.10.1159/000121862]Search in Google Scholar
[Rossdale P.D., Short R.V. (1967). The time of foaling of thoroughbred mares. J. Reprod. Fert., 13: 341-343.10.1530/jrf.0.0130341]Search in Google Scholar
[Roth Z. (2017). Effect of heat stress on reproduction in dairy cows: insights into the cellular and molecular responses of the oocyte. Annu. Rev. Anim. Biosci., 5: 151-170.10.1146/annurev-animal-022516-022849]Search in Google Scholar
[Sakaguchi K., Itoh M.T., Takahashi N., Tarumi W., Ishizuka B. (2013). The rat oocyte synthesizes melatonin. Reprod. Fertil. Dev., 25: 674–682.10.1071/RD12091]Search in Google Scholar
[Sartori R., Prata A.B., Figueiredo A.C.S., Sanches B.V., Pontes G.C.S., Viana J.H.M., Pontes J.H., Vasconcelos J.L.M., Pereira M.H.C., Dode M.A.N., Monteiro Jr P.L.J., Baruselli P.S. (2016). Update and overview on assisted reproductive technologies (ARTs) in Brazil. Anim. Reprod., 13: 300-312.10.21451/1984-3143-AR873]Search in Google Scholar
[Schuller L.K., Burfeind O., Heuwieser W. (2014). Impact of heat stress on conception rate of dairy cows in the moderate climate considering different temperature-humidity index thresholds, periods relative to breeding, and hot load indices. Theriogenology, 81: 1050-1057.10.1016/j.theriogenology.2014.01.029]Search in Google Scholar
[Sharpe P.H., Gifford D.R., Flavel P.F., Nottle M.B., Armstrong D.T. (1986). Effect of melatonin on postpartum anestrus in beef cows. Theriogenlogy, 26: 621-629.10.1016/0093-691X(86)90169-X]Search in Google Scholar
[Stevenson J.S. (1989). Relationship among climatological variables and hourly distribution of calvings in Holsteins fed during the late afternoon. J. Dairy Sci., 72: 2712-2717.10.3168/jds.S0022-0302(89)79414-5]Search in Google Scholar
[Svennersten-Sjaunja K., Olsson K. (2005). Endocrinology of milk production. Domest. Anim. Endocrinol., 29: 241-258.10.1016/j.domaniend.2005.03.006]Search in Google Scholar
[Sweetman W.J. (1950). Artificial breeding in Alaska and the effect of extra light during short winter days. J. Dairy Sci., 33: 391-392.]Search in Google Scholar
[Takada L., Junior A.M., Mingoti G.Z., Balieiro J.C., Cipolla-Neto J., Coelho L.A. (2012). Effect of melatonin on DNA damage of bovine cumulus cells during in vitro maturation (IVM) and on in vitro embryo development. Res. Vet. Sci., 92: 124-127.10.1016/j.rvsc.2010.11.004]Search in Google Scholar
[Tamarkin L., Baird C.J., Almeida O.F. (1985). Melatonin: a coordinating signal for mammalian reproduction? Science, 227: 714-720.10.1126/science.38818223881822]Search in Google Scholar
[Tamura H., Takasaki A., Taketani T., Tanabe M., Kuzuka F., Lee L., Tamura I., Maekawa R., Asada H., YamagataY., Sugino N. (2013). Melatonin as a free radical scavenger in the ovarian follicle. Endocr. J. 60: 1–13.10.1507/endocrj.EJ12-0263]Search in Google Scholar
[Wallace R.M., Pohler K.G., Smith M.F., Green J.A. (2015). Placental PAGs: Gene origins, expression patterns, and use as markers of pregnancy. Reproduction, 149: R115-R126.10.1530/REP-14-0485]Search in Google Scholar
[Wang F., Tian X., Zhou Y., Tan D., Zhu S., Dai Y., Liu G. (2014) Melatonin improves the quality of in vitro produced (IVP) bovine embryos: Implications for blastocyst development, cryotolerance, and modifications of relevant gene expression. PLoS ONE, 9: e93641.10.1371/journal.pone.0093641397358624695534]Search in Google Scholar
[Wetterberg L. (1999). Melatonin and clinical application. Reprod. Nutr. Dev., 39: 367-382.10.1051/rnd:19990309]Search in Google Scholar
[Wolfenson D., Roth Z. (2019). Impact of heat stress on cow reproduction and fertility. Anim. Front., 9: 32-38.10.1093/af/vfy027]Search in Google Scholar
[Woo M.M.M.,Tai C.J., Kang S.K., Nathwani P.M., Pang S.F., Leung P.C.K. (2001). Direct action of melatonin in human granulosa-luteal cells. J. Clin. Endocrinol. Metab. 86: 4789–4797.10.1210/jcem.86.10.7912]Search in Google Scholar
[Yarney T.A., Rahnefeld G.W., Parker R.J., Palmer W.M. (1982). Hourly distribution of time of parturition in beef cows. Can. J. Anim. Sci., 62: 597–605.10.4141/cjas82-069]Search in Google Scholar
[Zoli A.P., Guibault L.A., Delahaut P., Benitez Ortiz W., Beckers, J.F. (1992). Radioimmunoassay of a bovine pregnancy-associated glycoprotein in serum: Its application for pregnancy diagnosis. Biol. Reprod., 46: 83-92.10.1095/biolreprod46.1.83]Search in Google Scholar