Nutritional supplementation and artificial reproductive technique (ART) outcomes
A. J. Kermack A B C D E and N. S. Macklon B C DA Centre for Human Development, Stem Cells and Regeneration, Faculty of Medicine, University of Southampton, Duthie Building (MP808), Southampton General Hospital, Tremona Road, Southampton, Hampshire, SO16 6YD, UK.
B Academic Unit of Human Development and Health, Developmental Origins of Health and Disease (DOHaD), University of Southampton, Mailpoint 887, Institute of Developmental Sciences Building, Southampton General Hospital, Tremona Road, Southampton, Hampshire, SO16 6YD, UK.
C Complete Fertility Centre, Department of Obstetrics and Gynaecology, Princess Anne Hospital, Coxford Road, Southampton, Hampshire, SO16 5YA, UK.
D National Institute for Health Research, Southampton Biomedical Research Centre (in Nutrition), Southampton Centre for Biomedical Research, Southampton General Hospital, Mail Point 218, Tremona Road, Southampton, Hampshire SO16 6YD, UK.
E Corresponding author. Email: alexandra.kermack@uhs.nhs.uk
Reproduction, Fertility and Development 27(4) 677-683 https://doi.org/10.1071/RD14304
Submitted: 22 August 2014 Accepted: 27 February 2015 Published: 7 April 2015
Abstract
Approximately one in six couples suffer from subfertility, and many seek treatment with artificial reproductive technologies (ART). Despite improvements in laboratory techniques and ovarian stimulation, ongoing pregnancy rates per cycle remain at ~25%. Couples wanting to improve their chances may turn to adjuvant therapies, such as nutritional supplements. There is growing evidence that periconceptional nutritional status is a key determinant of fertility and long-term health of the offspring, and a lucrative market has developed to meet the demand based on these benefits. However, the practice of routine dietary supplementation before and during IVF treatment has not been subject to well-powered prospective randomised trials. In this article, the potential roles of specific nutritional supplements in the context of improving IVF outcomes are reviewed and an assessment is made of the evidence base supporting their clinical use in this context. Finally, current research needs in the field are outlined.
Additional keywords: embryo, in vitro fertilisation, nutrition, vitamin.
References
Agrawal, R., Burt, E., Gallagher, A. M., Butler, L., Venkatakrishnan, R., and Peitsidis, P. (2012). Prospective randomized trial of multiple micronutrients in subfertile women undergoing ovulation induction: a pilot study. Reprod. Biomed. Online 24, 54–60.| Prospective randomized trial of multiple micronutrients in subfertile women undergoing ovulation induction: a pilot study.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XmtFeisg%3D%3D&md5=89e9e10d3f19d8e371e7e2f053ce4c0dCAS | 22138521PubMed |
Anifandis, G. M., Dafopoulos, K., Messini, C. I., Chalvatzas, N., Liakos, N., Pournaras, S., and Messinis, I. E. (2010). Prognostic value of follicular fluid 25-OH vitamin D and glucose levels in the IVF outcome. Reprod. Biol. Endocrinol. 8, 91.
| Prognostic value of follicular fluid 25-OH vitamin D and glucose levels in the IVF outcome.Crossref | GoogleScholarGoogle Scholar | 20667111PubMed |
Attaman, J. A., Toth, T. L., Furtado, J., Campos, H., Hauser, R., and Chavarro, J. E. (2012). Dietary fat and semen quality among men attending a fertility clinic. Hum. Reprod. 27, 1466–1474.
| Dietary fat and semen quality among men attending a fertility clinic.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38Xmt1Sltbk%3D&md5=b909f3d057e0c1341fd98c7bd73f1e7bCAS | 22416013PubMed |
Bentivoglio, G., Melica, F., and Cristoforoni, P. (1993). Folinic acid in the treatment of human male infertility. Fertil. Steril. 60, 698–701.
| 1:STN:280:DyaK2c%2FgvFOktA%3D%3D&md5=61079baff77cc1460725500c28c09663CAS | 8405528PubMed |
Blomberg Jensen, M., Bjerrum, P. J., Jessen, T. E., Nielsen, J. E., Joensen, U. N., Olesen, I. A., Petersen, J. H., Juul, A., Dissing, S., and Jorgensen, N. (2011). Vitamin D is positively associated with sperm motility and increases intracellular calcium in human spermatozoa. Hum. Reprod. 26, 1307–1317.
| Vitamin D is positively associated with sperm motility and increases intracellular calcium in human spermatozoa.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXms1ajurk%3D&md5=bf0ed1955ff30da316148e32f44b0244CAS | 21427118PubMed |
Boxmeer, J. C., Smit, M., Weber, R. F., Lindemans, J., Romijn, J. C., Eijkemans, M. J., Macklon, N. S., and Steegers-Theunissen, R. P. (2007). Seminal plasma cobalamin significantly correlates with sperm concentration in men undergoing IVF or ICSI procedures. J. Androl. 28, 521–527.
| Seminal plasma cobalamin significantly correlates with sperm concentration in men undergoing IVF or ICSI procedures.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2sXosVymurY%3D&md5=7cd2ab250041e8f2c680270bd962077eCAS | 17287458PubMed |
Boxmeer, J. C., Brouns, R. M., Lindemans, J., Steegers, E. A., Martini, E., Macklon, N. S., and Steegers-Theunissen, R. P. (2008). Preconception folic acid treatment affects the microenvironment of the maturing oocyte in humans. Fertil. Steril. 89, 1766–1770.
| Preconception folic acid treatment affects the microenvironment of the maturing oocyte in humans.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXosVSrurw%3D&md5=32d1fc05847d8ed8441ba0d3a5a59e42CAS | 17923130PubMed |
Boxmeer, J. C., Macklon, N. S., Lindemans, J., Beckers, N. G., Eijkemans, M. J., Laven, J. S., Steegers, E. A., and Steegers-Theunissen, R. P. (2009). IVF outcomes are associated with biomarkers of the homocysteine pathway in monofollicular fluid. Hum. Reprod. 24, 1059–1066.
| IVF outcomes are associated with biomarkers of the homocysteine pathway in monofollicular fluid.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1MXksFejtbc%3D&md5=f9e9a650a03f4d9f564747a5f0af05a5CAS | 19221098PubMed |
Cheang, K. I., Baillargeon, J.-P., Essah, P. A., Ostlund, R. E., Apridonize, T., Islam, L., and Nestler, J. E. (2008). Insulin-stimulated release of D-chiro-inositol–containing inositolphosphoglycan mediator correlates with insulin sensitivity in women with polycystic ovary syndrome Metabolism 57, 1390–1397.
| Insulin-stimulated release of D-chiro-inositol–containing inositolphosphoglycan mediator correlates with insulin sensitivity in women with polycystic ovary syndromeCrossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXhtFekt73M&md5=c740aeda4aec36b79160eb9a1b5cb9beCAS | 18803944PubMed |
Cicek, N., Eryilmaz, O. G., Sarikaya, E., Gulerman, C., and Genc, Y. (2012). Vitamin E effect on controlled ovarian stimulation of unexplained infertile women. J. Assist. Reprod. Genet. 29, 325–328.
| Vitamin E effect on controlled ovarian stimulation of unexplained infertile women.Crossref | GoogleScholarGoogle Scholar | 22302530PubMed |
Ciotta, L., Stracquadanio, M., Pagano, I., Carbonaro, A., Palumbo, M., and Gulino, F. (2011). Effects of myo-inositol supplementation on oocyte’s quality in PCOS patients: a double blind trial. Eur. Rev. Med. Pharmacol. Sci. 15, 509–514.
| 1:STN:280:DC%2BC3Mnnt1Oiuw%3D%3D&md5=c984f09194cb0d93462436b4e98c8db6CAS | 21744744PubMed |
Crha, I., Hruba, D., Ventruba, P., Fiala, J., Totusek, J., and Visnova, H. (2003). Ascorbic acid and infertility treatment. Cent. Eur. J. Public Health 11, 63–67.
| 1:CAS:528:DC%2BD3sXmtVKqur4%3D&md5=2ce30a80a181bff5601dd0eae0467d86CAS | 12884545PubMed |
Dobson, R. (2002). Data on IVF clinics show wide variation in success rate. BMJ 325, 460.
| Data on IVF clinics show wide variation in success rate.Crossref | GoogleScholarGoogle Scholar | 12211226PubMed |
Fuse, H., Kazama, T., Ohta, S., and Fujiuchi, Y. (1999). Relationship between zinc concentrations in seminal plasma and various sperm parameters. Int. Urol. Nephrol. 31, 401–408.
| Relationship between zinc concentrations in seminal plasma and various sperm parameters.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD3cXptVehsw%3D%3D&md5=d87257cfec71f4aa6fd46679ce85c478CAS | 10672961PubMed |
Gerli, S., Papaleo, E., Ferrari, A., and Di Renzo, G. C. (2007). Randomized, double blind placebo-controlled trial: effects of myo-inositol on ovarian function and metabolic factors in women with PCOS. Eur. Rev. Med. Pharmacol. Sci. 11, 347–354.
| 1:STN:280:DC%2BD2sjjvV2gtg%3D%3D&md5=c2d818f831fd9eb589b864ac084269b8CAS | 18074942PubMed |
Grajecki, D., Zyriax, B. C., and Buhling, K. J. (2012). The effect of micronutrient supplements on female fertility: a systematic review. Arch. Gynecol. Obstet. 285, 1463–1471.
| The effect of micronutrient supplements on female fertility: a systematic review.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38Xls12itLw%3D&md5=58630706e8237d319114a1b6ea689c2eCAS | 22302137PubMed |
Greco, E., Iacobelli, M., Rienzi, L., Ubaldi, F., Ferrero, S., and Tesarik, J. (2005). Reduction of the incidence of sperm DNA fragmentation by oral antioxidant treatment. J. Androl. 26, 349–353.
| Reduction of the incidence of sperm DNA fragmentation by oral antioxidant treatment.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD2MXkvVWjsr8%3D&md5=128a311e695ff11edcab8cfddb337a8bCAS | 15867002PubMed |
Griesinger, G., Franke, K., Kinast, C., Kutzelnigg, A., Riedinger, S., Kulin, S., Kaali, S. G., and Feichtinger, W. (2002). Ascorbic acid supplement during luteal phase in IVF. J. Assist. Reprod. Genet. 19, 164–168.
| Ascorbic acid supplement during luteal phase in IVF.Crossref | GoogleScholarGoogle Scholar | 12036083PubMed |
Hammiche, F., Vujkovic, M., Wijburg, W., de Vries, J. H., Macklon, N. S., Laven, J. S., and Steegers-Theunissen, R. P. (2011). Increased preconception omega-3 polyunsaturated fatty acid intake improves embryo morphology. Fertil. Steril. 95, 1820–1823.
| Increased preconception omega-3 polyunsaturated fatty acid intake improves embryo morphology.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3MXjs1SrurY%3D&md5=f0f7881a8665133f2fc12f742a1f89eaCAS | 21130435PubMed |
Jameson, S. (1976). Effects of zinc deficiency in human reproduction. Acta Med. Scand. Suppl. 593, 1–89.
| 1:STN:280:DyaE2s%2FhvV2muw%3D%3D&md5=ec45526e9b3c8d2d6e1fe9add2688aa2CAS | 1067745PubMed |
Kermack, A. J., Calder, P. C., Houghton, F. D., Godfrey, K. M., and Macklon, N. S. (2014). A randomised controlled trial of a preconceptional dietary intervention in women undergoing IVF treatment (PREPARE trial). BMC Womens Health 14, 130.
| A randomised controlled trial of a preconceptional dietary intervention in women undergoing IVF treatment (PREPARE trial).Crossref | GoogleScholarGoogle Scholar | 25407227PubMed |
Kermack, A. J., and Macklon, N. S. (2014). Vitamin supplement usage in 400 women embarking on in vitro fertilization treatment. In ‘Proceedings of the British Fertility Society Annual Meeting’, 8–9 January 2014, Sheffield. Available at http://www.britishfertilitysociety.org.uk/meetings/2014/annual2014/PDFRepository/BFS%202014%20Final%20Programme%20Text_v7(web).pdf [Verified 12 March 2015]
Ko, E. Y., and Sabanegh, E. S. (2012). The role of over-the-counter supplements for the treatment of male infertility: fact or fiction? J. Androl. 33, 292–308.
| The role of over-the-counter supplements for the treatment of male infertility: fact or fiction?Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhtVOmt77F&md5=e278d83886d889eab021706e1d94ab78CAS | 21597088PubMed |
Landau, B., Singer, R., Klein, T., and Segenreich, E. (1978). Folic acid levels in blood and seminal plasma of normo- and oligospermic patients prior and following folic acid treatment. Experientia 34, 1301–1302.
| Folic acid levels in blood and seminal plasma of normo- and oligospermic patients prior and following folic acid treatment.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaE1MXmtlE%3D&md5=0bf4e9ddbba8ab14e6d91b76bc6301f3CAS | 570119PubMed |
Lisi, F., Carfagna, P., Oliva, M. M., Rago, R., Lisi, R., Poverini, R., Manna, C., Vaquero, E., Caserta, D., Raparelli, V., Marci, R., and Moscarini, M. (2012). Pretreatment with myo-inositol in non polycystic ovary syndrome patients undergoing multiple follicular stimulation for IVF: a pilot study. Reprod. Biol. Endocrinol. 10, 52.
| Pretreatment with myo-inositol in non polycystic ovary syndrome patients undergoing multiple follicular stimulation for IVF: a pilot study.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhvVequrfN&md5=2547c4328bcb3645af11787d1ecab124CAS | 22823904PubMed |
Liu, M., Yin, Y., Ye, X., Zeng, M., Zhao, Q., Keefe, D. L., and Liu, L. (2013). Resveratrol protects against age-associated infertility in mice. Hum. Reprod. 28, 707–717.
| Resveratrol protects against age-associated infertility in mice.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXislOmtbk%3D&md5=ac5f23aed2315fa5148beb8730878597CAS | 23293221PubMed |
McAree, T., Jacobs, B., Manickavasagar, T., Sivalokanathan, S., Brennan, L., Bassett, P., Rainbow, S., and Blair, M. (2013). Vitamin D deficiency in pregnancy: still a public health issue. Matern. Child Nutr. 9, 23–30.
| Vitamin D deficiency in pregnancy: still a public health issue.Crossref | GoogleScholarGoogle Scholar | 23230904PubMed |
Mendiola, J., Torres-Cantero, A. M., Vioque, J., Moreno-Grau, J. M., Ten, J., Roca, M., Moreno-Grau, S., and Bernabeu, R. (2010). A low intake of antioxidant nutrients is associated with poor semen quality in patients attending fertility clinics. Fertil. Steril. 93, 1128–1133.
| A low intake of antioxidant nutrients is associated with poor semen quality in patients attending fertility clinics.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXkvVaqt74%3D&md5=9a3a3c86e866879d5d6dab37116f2217CAS | 19147135PubMed |
Mínguez-Alarcón, L., Mendiola, J., López-Espín, J. J., Sarabia-Cos, L., Vivero-Salmerón, G., Vioque, J., Navarrete-Muñoz, E. M., and Torres-Cantero, A. M. (2012). Dietary intake of antioxidant nutrients is associated with semen quality in young university students. Hum. Reprod. 27, 2807–2814.
| Dietary intake of antioxidant nutrients is associated with semen quality in young university students.Crossref | GoogleScholarGoogle Scholar | 22752607PubMed |
MRC Vitamin Study Research Group (1991). Prevention of neural tube defects: results of the Medical Research Council Vitamin Study. Lancet 338, 131–137.
| Prevention of neural tube defects: results of the Medical Research Council Vitamin Study.Crossref | GoogleScholarGoogle Scholar | 1677062PubMed |
Murto, T., Skoog Svanberg, A., Yngve, A., Nilsson, T. K., Altmae, S., Wanggren, K., Salumets, A., and Stavreus-Evers, A. (2014). Folic acid supplementation and IVF pregnancy outcome in women with unexplained infertility. Reprod. Biomed. Online 28, 766–772.
| Folic acid supplementation and IVF pregnancy outcome in women with unexplained infertility.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXmtlWhsrc%3D&md5=b392de87dea2b817124d397616cb43baCAS | 24745837PubMed |
Nestler, J. E., Jakubowicz, D. J., Reamer, P., Gunn, R. D., and Allan, G. (1999). Ovulatory and metabolic effects of d-chiro-inositol in the polycystic ovary syndrome. N. Engl. J. Med. 340, 1314–1320.
| Ovulatory and metabolic effects of d-chiro-inositol in the polycystic ovary syndrome.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK1MXjtVWqt7c%3D&md5=7b9309ce4190833741bf5dc07461ce91CAS | 10219066PubMed |
Ng, S. C., Karunanithy, R., Edirisinghe, W. R., Roy, A. C., Wong, P. C., and Ratnam, S. S. (1987). Human follicular fluid levels of calcium, copper and zinc. Gynecol. Obstet. Invest. 23, 129–132.
| Human follicular fluid levels of calcium, copper and zinc.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaL2sXkslCrt70%3D&md5=4d7184aa11902034d8b70867abcb03f3CAS | 3583092PubMed |
Ozkan, S., Jindal, S., Greenseid, K., Shu, J., Zeitlian, G., Hickmon, C., and Pal, L. (2010). Replete vitamin D stores predict reproductive success following in vitro fertilization. Fertil. Steril. 94, 1314–1319.
| Replete vitamin D stores predict reproductive success following in vitro fertilization.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3cXhtVyrtLnN&md5=2e50ac7c3e2a2c4ac72ec877b5e12e8fCAS | 19589516PubMed |
Paffoni, A., Ferrari, S., Vigano, P., Pagliardini, L., Papaleo, E., Candiani, M., Tirelli, A., Fedele, L., and Somigliana, E. (2014). Vitamin D deficiency and infertility: insights from in vitro fertilization cycles. J. Clin. Endocrinol. Metab. 99, E2372–E2376.
| Vitamin D deficiency and infertility: insights from in vitro fertilization cycles.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXhvFGhsr%2FE&md5=a190a1518a37d2574455bf08c4640570CAS | 25121462PubMed |
Paszkowski, T., Traub, A. I., Robinson, S. Y., and McMaster, D. (1995). Selenium dependent glutathione peroxidase activity in human follicular fluid. Clin. Chim. Acta 236, 173–180.
| Selenium dependent glutathione peroxidase activity in human follicular fluid.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DyaK2MXlvFKhtbk%3D&md5=6fbf2449a0f650efb2cbdb0405040445CAS | 7554284PubMed |
Polyzos, N. P., Anckaert, E., Guzman, L., Schiettecatte, J., Van Landuyt, L., Camus, M., Smitz, J., and Tournaye, H. (2014). Vitamin D deficiency and pregnancy rates in women undergoing single embryo, blastocyst stage, transfer (SET) for IVF/ICSI. Hum. Reprod. 29, 2032–2040.
| Vitamin D deficiency and pregnancy rates in women undergoing single embryo, blastocyst stage, transfer (SET) for IVF/ICSI.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC2cXhtl2gtbzE&md5=32734181c81cfb2a1c553ae9d7b077ccCAS | 24951484PubMed |
Robbins, W. A., Xun, L., FitzGerald, L. Z., Esguerra, S., Henning, S. M., and Carpenter, C. L. (2012). Walnuts improve semen quality in men consuming a Western-style diet: randomized control dietary intervention trial. Biol. Reprod. 87, 101.
| Walnuts improve semen quality in men consuming a Western-style diet: randomized control dietary intervention trial.Crossref | GoogleScholarGoogle Scholar | 22895856PubMed |
Ronnenberg, A. G., Venners, S. A., Xu, X., Chen, C., Wang, L., Guang, W., Huang, A., and Wang, X. (2007). Preconception B-vitamin and homocysteine status, conception, and early pregnancy loss. Am. J. Epidemiol. 166, 304–312.
| Preconception B-vitamin and homocysteine status, conception, and early pregnancy loss.Crossref | GoogleScholarGoogle Scholar | 17478435PubMed |
Ruder, E. H., Hartman, T. J., Reindollar, R. H., and Goldman, M. B. (2014). Female dietary antioxidant intake and time to pregnancy among couples treated for unexplained infertility. Fertil. Steril. 101, 759–766.
| Female dietary antioxidant intake and time to pregnancy among couples treated for unexplained infertility.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXitVWjsb3L&md5=8314aa66679d914b918d8b403a6ff720CAS | 24355050PubMed |
Rudick, B. J., Ingles, S. A., Chung, K., Stanczyk, F. Z., Paulson, R. J., and Bendikson, K. A. (2014). Influence of vitamin D levels on in vitro fertilization outcomes in donor-recipient cycles. Fertil. Steril. 101, 447–452.
| Influence of vitamin D levels on in vitro fertilization outcomes in donor-recipient cycles.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXhsleiu7zJ&md5=acaad588204027f2f29aebd440bd9cedCAS | 24210230PubMed |
Schmid, T. E., Eskenazi, B., Marchetti, F., Young, S., Weldon, R. H., Baumgartner, A., Anderson, D., and Wyrobek, A. J. (2012). Micronutrients intake is associated with improved sperm DNA quality in older men. Fertil. Steril. 98, 1130–1137e1.
| Micronutrients intake is associated with improved sperm DNA quality in older men.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38Xht1Ojsb%2FE&md5=0b6b5df467d44076218cb0a7b6dcd22bCAS | 22935557PubMed |
Showell, M. G., Brown, J., Clarke, J., and Hart, R. J. (2013). Antioxidants for female subfertility. Cochrane Database Syst. Rev. 8, CD007807.
| 23913583PubMed |
Soltan, M. H., and Jenkins, D. M. (1983). Plasma copper and zinc concentrations and infertility. Br. J. Obstet. Gynaecol. 90, 457–459.
| Plasma copper and zinc concentrations and infertility.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DyaL3s3gsVOisA%3D%3D&md5=bf89c328ce623c5c508bb9128b2a1fa9CAS | 6849847PubMed |
Suleiman, S. A., Ali, M. E., Zaki, Z. M., el-Malik, E. M., and Nasr, M. A. (1996). Lipid peroxidation and human sperm motility: protective role of vitamin E. J. Androl. 17, 530–537.
| 1:CAS:528:DyaK2sXitlKltA%3D%3D&md5=80705ade9b27b0558e098c4024d81973CAS | 8957697PubMed |
Vujkovic, M., de Vries, J. H., Lindemans, J., Macklon, N. S., van der Spek, P. J., Steegers, E. A., and Steegers-Theunissen, R. P. (2010). The preconception Mediterranean dietary pattern in couples undergoing in vitro fertilization/intracytoplasmic sperm injection treatment increases the chance of pregnancy. Fertil. Steril. 94, 2096–2101.
| The preconception Mediterranean dietary pattern in couples undergoing in vitro fertilization/intracytoplasmic sperm injection treatment increases the chance of pregnancy.Crossref | GoogleScholarGoogle Scholar | 20189169PubMed |
Wakefield, S. L., Lane, M., Schulz, S. J., Hebart, M. L., Thompson, J. G., and Mitchell, M. (2008). Maternal supply of omega-3 polyunsaturated fatty acids alter mechanisms involved in oocyte and early embryo development in the mouse. Am. J. Physiol. Endocrinol. Metab. 294, E425–E434.
| Maternal supply of omega-3 polyunsaturated fatty acids alter mechanisms involved in oocyte and early embryo development in the mouse.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BD1cXit1ykur0%3D&md5=7c913b6548daade2b74f8419144253abCAS | 18073322PubMed |
Westphal, L. M., Polan, M. L., and Trant, A. S. (2006). Double-blind, placebo-controlled study of Fertilityblend: a nutritional supplement for improving fertility in women. Clin. Exp. Obstet. Gynecol. 33, 205–208.
| 1:STN:280:DC%2BD2s%2Fhs1Slsg%3D%3D&md5=77c95f619204b38ff5a1e884609e668eCAS | 17211965PubMed |
Wong, W. Y., Merkus, H. M., Thomas, C. M., Menkveld, R., Zielhuis, G. A., and Steegers-Theunissen, R. P. (2002). Effects of folic acid and zinc sulfate on male factor subfertility: a double-blind, randomized, placebo-controlled trial. Fertil. Steril. 77, 491–498.
| Effects of folic acid and zinc sulfate on male factor subfertility: a double-blind, randomized, placebo-controlled trial.Crossref | GoogleScholarGoogle Scholar | 11872201PubMed |