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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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.
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
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
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
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
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
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
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.
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
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
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
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
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
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
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
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
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.
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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