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1. Check JH, Nowroozi K, Chase JS, Vaze M, Joshi S, Baker A: Serum progestagen-associated endometrial protein (PEP) levels in conception versus non-conception cycles following in vitro fertilization embryo transfer. J IVF-ET 7:134-136, 1990.

2. Check JH, Nowroozi K, Chase JS, Nazari A, Callan C: Comparison of luteal-phase support with high- and low-dose progesterone therapy on pregnancy rates in an in vitro fertilization program. J IVF-ET 8:173-175, 1991.

3. Check JH, Nowroozi K, Choe J, Dietterich C: Influence of endometrial thickness and echo patterns on pregnancy rates during in vitro fertilization. Fertil Steril 56:1173-1175, 1991.

4. Check JH, Nowroozi K, Chase JS, Dietterich C: Effect of increased mid-cycle androgen levels following controlled ovarian hyperstimulation during IVF on fertilization/pregnancy rates. Assisted Reproductive Technology/Andrology Supplement III 85-87, 1991.

5. Check JH, Nowroozi K, Chase JS: Comparison of short versus long-term leuprolide acetate-human menopausal gonadotropin hyperstimulation in in vitro fertilization patients. Hum Reprod 7:31-34, 1992.

6. Barnea ER, Check JH, O’Shaughnessy A: Pregnancy rate and outcome of embryo transfer: dorsal lithotomy vs knee-chest position: a randomized prospective study. ARTA 3:59-62, 1992.

7. Coates TE, Check JH, Choe J, Nowroozi K, Lurie D, Callan C: An evaluation of couples with failure of fertilization in vitro. Hum Reprod 7(7):978-981, 1992.

8. Check JH, Nowroozi K, Choe J, Lurie D, Dietterich C: The effect of endometrial thickness and echo pattern on in vitro fertilization outcome in donor oocyte-embryo transfer cycle. Fertil Steril 59:72-75, 1993.

9. Baker AF, Choe JK, Check JH, Hourani CL, Summers DC, Stumpo L: Pregnancy rates using different hormonal stimulations for frozen embryo replacement cycles. ARTA 3:93-95, 1992.

10. Barnea, ER, Choe JK, Peymer M, Check JH: Effect of serum sperm antibodies in women on embryo quality and pregnancy outcome following IVF: A controlled study. ARTA 3:321-325, 1992.

11. Check JH, Lurie D, Dietterich C, Callan C, Baker A: Adverse effect of a homogeneous hyperechogenic endometrial sonographic pattern despite adequate endometrial thickness on pregnancy rates following in vitro fertilization. Hum Reprod 8:1293-1296, 1993.

12. Check JH, Lurie D, Hoover L, Stumpo L, Summers D: Association of higher pregnancy rates with low serum progesterone levels (by RIA) at time of hCG not corroborated when using a non-isotopic immunoassay. J Assist Reprod Genetics 10(5):384-387, 1993.

13. Check JH, Lurie D, Callan C, Baker A, Benfer K: Comparison of the cumulative probability of pregnancy following in vitro fertilization-embryo transfer by infertility factor and age. Fertil Steril 61(2)257-261, 1994.

14. Check JH, Lurie D, Askari HA, Hoover L, Lauer C: The range of subtle rise in serum progesterone levels following controlled ovarian hyperstimulation associated with lower in vitro fertilization pregnancy rates is determined by the source of manufacturer. Euro J Obstet Gynecol Reprod Biol 52:205-209, 1993.

15. Check JH, Kwirenk D, Katsoff D, Press M, Breen E, Baker A: Male:female sex ratio in births resulting from IVF according to swim-up versus Percoll preparation of inseminated sperm. Arch Androl 33:63-65, 1994.

16. Nazari A, Askari HA, Check JH, O’Shaughnessy A: Embryo transfer technique as a cause of ectopic pregnancy in in vitro fertilization. Fertil Steril 60:919-921, 1993.

17. Hoover L, Summers D, Check JH, Nazari A, O’Shaughnessy A: Pregnancies following zona drilling of cryopreserved thawed embryos. Fertil Steril 63:401-403, 1995.

18. Check JH: Uterine receptivity in subjects with ovarian failure. Fertil Steril 55:1208-1209, 1991.

19. Check JH, Katsoff D, Bollendorf A, Callan C: The effect of sera antisperm antibodies in the female partner on in vivo and in vitro pregnancy and spontaneous abortion rates. Amer J Reprod Immun 33:131-133, 1995.

20. Check JH, Dietterich C, Lurie D, Adelson H, O’Shaughnessy A: The relationship of endometrial thickness and sonographic echo pattern to endometriosis in non in vitro fertilization cycle. Gyn/Ob Invest 40:113-116, 1995.

21. Check JH, O’Shaughnessy A, Nazari A, Hoover L: Comparison of efficacy of high dose pure follicle stimulating hormone versus human menopausal gonadotropin for in vitro fertilization. Gynecol Obstet Invest 40:117-119, 1995.

22. Check JH, Lurie D, O’Shaughnessy A, Dietterich C: The relationship of endometriosis to endometrial sonographic studies prior to administration of human chorionic gonadotropin in patients undergoing in vitro fertilization and embryo transfer. Human Reproduction 10 (4):938-941, 1995.

23. Shanis B, Check JH, O’Shaughnessy A, Summers D: Improved pregnancy rates (PRs) in older patients or those with elevated baseline FSH levels with short flare or clomiphene-hMG hyperstimulation protocols. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by A. Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, Szalay, W. Urdl and H. Zech, pages 279-283, Vienna, Austria, April 3-7, 1995.

24. Shanis B, Summers D, Check JH, O’Shaughnessy A, Nazari A: An ultra-short use of leuprolide acetate works as well as longer use to prevent premature luteinization following controlled ovarian hyperstimulation. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by A. Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 273-277, Vienna, Austria, April 3-7, 1995.

25. Sapoznikov V, Check JH, O’Shaughnessy A, Nazari A: The relationship of endometriosis and pre-hCG endometrial sonographic studies in patients undergoing in vitro fertilization embryo transfer (IVF-ET). IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by A. Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 687-691, Vienna, Austria, April 3-7, 1995.

26. Sapoznikov V, Nazari A, Check JH, O’Shaughnessy A: Lowered pregnancy rates seen in IVF patients with a homogeneous hyperechogenic endometrial echo pattern prior to hCG injection. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by A. Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 373-377, Vienna, Austria, April 3-7, 1995.

27. Summers D, Check JH, Nazari A, O’Shaughnessy A, Hoover L: Subtle rise in progesterone (P) at time of human chorionic gonadotropin (hCG) may have more of an adverse effect on the endometrium than the oocyte as determined by a shared oocyte program. IX World Congress on In Vitro fertilization and Assisted Reproduction, Monduzzi Editore, Edited by A. Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 285-289, Vienna, Austria, April 3-7, 1995.

28. Sapoznikov V, Check JH, Nazari A, O’Shaughnessy A: Pregnancy rates (PRs) according to endometrial thickness and echo pattern at time of hCG. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by A. Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 369-372, Vienna, Austria, April 3-7, 1995.

29. Hoover L, O’Shaughnessy A, Nazari A, Check JH: An RIA by Amersham with a low coefficient of variation in the low serum P range associated with better pregnancy rate prognosis with IVF-ET. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by A. Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 255-258, Vienna, Austria, April 3-7, 1995.

30. Shanis B, Katsoff D, Bollendorf A, Summers D, Check JH: Sera antisperm antibodies (ASA) in female partners does not reduce IVF pregnancy rates (PRs). IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 595-599, Vienna, Austria, April 3-7, 1995.

31. Hoover L, Summers D, Check JH, Nazari A, O’Shaughnessy A: Pregnancy after zona drilling of cryopreserved thawed embryos. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 647-650, Vienna, Austria, April 3-7, 1995.

32. Hoover L, O’Shaughnessy A, Check JH, Nazari A: Luteinizing hormone (LH) in follicle stimulating drugs not needed despite long suppression with gonadotropin releasing hormone agonists. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 259-263, Vienna, Austria, April 3-7, 1995.

33. Shanis B, Nazari A, Check JH, Summers D, O’Shaughnessy A: Culture and treatment of mycoplasma /ureaplasma (M/U) infection not found helpful to improve pregnancy rates following IVF. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 727-730, Vienna, Austria, April 3-7, 1995.

34. Summers D, Check JH, Hoover L, O’Shaughnessy A, Nazari A: A 36 hour time of retrieval from human chorionic gonadotropin (hCG) injection may produce better pregnancy rates (PR) than a 34 hour interval. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 291-294, Vienna, Austria, April 3-7, 1995.

35. Hoover L, Summers D, Check JH, Nazari A, O’Shaughnessy A: EIA methods for measuring serum progesterone (P) at time of human chorionic gonadotropin (hCG) not predictive of subsequent pregnancy rates (PR). IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 351-355, Vienna, Austria, April 3-7, 1995.

36. Sapoznikov V, Check JH, Nazari A, O’Shaughnessy A: Deep-fundal rather than mid-fundal placement of embryos increases ectopic but not intrauterine pregnancy rate. IX World Congress on In Vitro Fertilization and Assisted Reproduction, Monduzzi Editore, Edited by A. Aburumieh, E. Bernat, G. Dohr, W. Feichtinger, F. Fischl, J. Huber, E. Muller, S. Szalay, W. Urdl and H. Zech, pages 365-368, Vienna, Austria, April 3-7, 1995.

37. Hoover L, Baker A, Check JH, Lurie D. O’Shaughnessy A: Evaluation of a new embryo-grading system to predict pregnancy rates following in vitro fertilization. Gynecol Obstet Invest, 40:151-157, 1995.

38. Check JH, Hoover L, Nazari A. O’Shaughnessy A, Summers D: The effect of assisted hatching on pregnancy rates following frozen embryo transfer. Fertility & Sterility, 65:254-257, 1996.

39. Check JH, Nazari A, Dietterich C: Comparison of androgen levels in conception vs. non-conception cycles following controlled ovarian stimulation using the luteal phase gonadotropin-releasing hormone agonist protocol. Gynecol Endocrinol, (9):209-214, 1995.

40. Check JH, Baker A, Benfer K, Lurie D, Katsoff D: Transfer of cryopreserved embryos improved pregnancy rates in patients with damage to the functional integrity of the sperm membrane as measured by the hypoosmotic swelling test. Fertility & Sterility 65(6):1241-1244, 1996.

41. Check JH, Nazari A, Kuhn R, Lauer C: Relationship of early follicular phase sera follicle stimulating hormone and luteinizing hormone levels as measured by a radioimmunoassay and an enzyme-linked immunosorbent assay to number of oocytes retrieved. Clinical & Experimental OB/GYN XXIII (2):83-86, 1996.

42. Check JH, Lauer C, Ubelacker L, Kuhn R: Comparison of an enzyme-linked immunosorbent assay vs radioimmunoassay for measuring serum progesterone at low levels. Clinical & Experimental OB/GYN XXIII (2):61-64, 1996.

43. Baker A, Check JH, Lurie D, Hourani C, Hoover LM: Pregnancy achieved with pronuclear-stage embryos that were cryopreserved and thawed twice: a case report. Journal of Assisted Reprod & Genetics 13(9):713-715, 1996.

44. Hoover L, Baker A, Check JH, Lurie D, Summers D: Clinical outcome of cryopreserved human pronuclear stage embryos resulting from intracytoplasmic sperm infection. Fertil Steril 67:621-624, 1997.

45. Check JH, Pesso R, Peymer M: A study to determine whether serum follicle-stimulating hormone can be a marker for ovarian hyperresponse to follicle-maturing drugs for in vitro fertilization. Gynecol Obstet Invest 43:242-244, 1997.

46. Peymer M, Check JH, Choe J, Nazari A: Higher pregnancy rates (PRs) following in vitro fertilization-embryo transfer (IVF-ET) with luteal phase leuprolide acetate (LA)/gonadotropin hyperstimulation regimen if serum estradiol (E2) increases by at least 10% the day after human chorionic gonadotropin (hCG). In: In Vitro Fertilization and Assisted Reproduction, Proceedings of the 10th World Congress of In Vitro Fertilization and Assisted Reproduction. Eds: Gomel V, Leung PCK. Monduzzi Editore. Pgs. 851-854, 1997.

47. Choe J, Check JH, Dietterich C, Lowney M: The measurement of uterine blood flow impedance using the color Doppler sonogram does not help predict lower pregnancy rates (PRs) in women having appropriate endometrial thickness and echo patterns prior to oocyte retrieval. In: In Vitro Fertilization and Assisted Reproduction, Proceedings of the 10th World Congress of In Vitro Fertilization and Assisted Reproduction. Eds: Gomel V, Leung PCK. Monduzzi Editore. Pgs. 797-801, 1997.

48. Summers D, Check JH, Peymer M, Choe J: Pregnancy rates in women older than 43 following in vitro fertilization-embryo transfer (IVF-ET) with assisted ET. In: In Vitro Fertilization and Assisted Reproduction, Proceedings of the 10th World Congress of In Vitro Fertilization and Assisted Reproduction. Eds: Gomel V, Leung PCK. Monduzzi Editore. Pgs. 711-714, 1997.

49. Choe J, Check JH, Kaplan N: Lymphocyte immunotherapy before in vitro fertilization may improve pregnancy rates (PRs) in patients with previous failed cycles. In: In Vitro Fertilization and Assisted Reproduction, Proceedings of the 10th World Congress of In Vitro Fertilization and Assisted Reproduction. Eds: Gomel V, Leung PCK. Monduzzi Editore. Pgs. 905-908, 1997.

50. Choe J, Check JH, Summers D, Peymer M: A comparison of pregnancy rates (PRs) following frozen embryo transfer (ET) in women receiving estrogen in gradually rising doses by use of down regulation of gonadotropin with leuprolide acetate (LA) in the luteal phase. In: In Vitro Fertilization and Assisted Reproduction, Proceedings of the 10th World Congress of In Vitro Fertilization and Assisted Reproduction. Eds: Gomel V, Leung PCK. Monduzzi Editore. Pgs. 837-839, 1997.

51. Check JH, O’Shaughnessy A, Lurie D, Fisher C, Adelson HG: Evaluation of the mechanism for higher pregnancy rates in donor oocyte recipients by comparison of fresh with frozen embryo transfer pregnancy rates in a shared oocyte programme. Hum Reprod 10:3022-3027, 1995.


52. Check JH, Dietterich C, Lurie D, Nazari A, Chuong J: A matched study to determine whether low-dose aspirin without heparin improves pregnancy rates following frozen embryo transfer and/or affects endometrial sonographic parameters. J Assist Reprod Genet 15:579-582, 1998.

53. Choe J, Check JH: Salpingectomy for unilateral hydrosalpinx may improve in vivo fecundity. Gynecol Obstet Invest 48:285-287, 1999.

54. Dietterich C, Check JH, Lurie D, Choe JK: Uterine artery vascular impedance measured by doppler sonography throughout an IVF cycle with ovarian stimulation does not correlate with pregnancy outcome. In: In Vitro Fertilization and Human Reproductive Genetics, Proceedings of the 11th World Congress on In Vitro Fertilization and Human Reproductive Genetics. Monduzzi Editore. Pgs 173-177, 1999.

55. Choe J, Check JH, Perkins S, Summers-Chase D: In vitro fertilization-embryo transfer (IVF-ET) can be successful in women over age 40. In: In Vitro Fertilization and Human Reproductive Genetics, Proceedings of the 11th World Congress on In Vitro Fertilization and Human Reproductive Genetics. Monduzzi Editore. Pgs 223-226, 1999.

56. Dietterich C, Check JH, Lurie D, Choe JK: Preliminary evidence that ovarian stimulation in IVF-ET cycles may lower vascular impedance of the uterine arteries. In: In Vitro Fertilization and Human Reproductive Genetics, Proceedings of the 11th World Congress on In Vitro Fertilization and Human Reproductive Genetics. Monduzzi Editore. Pgs 179-182, 1999.

57. Check M, Summers-Chase D, Check JH, Choe J, Nazari A: Sperm extracted and cryopreserved from testes several hours after death results in pregnancy following frozen embryo transfer: Case report. Arch Androl 43:235-237, 1999.

58. Check JH, Choe JK, Nazari A: Hyperreactio luteinalis despite the absence of a corpus luteum and suppressed serum follicle stimulating concentrations in a triplet pregnancy. Hum Reprod 15:1043-1045, 2000.


59. Summers D, Check JH, Choe J, Hoover L: Assisted embryo hatching improves pregnancy rates (PRs) in women aged 40-43 years. In: In Vitro Fertilization and Assisted Reproduction, Proceedings of the 10th World Congress of In Vitro Fertilization and Assisted Reproduction. Eds: Gomel V, Leung PCK. Monduzzi Editore. Pgs. 909-913, 1997.

60. Check JH, Liss JR: Sera estradiols in women conceiving by in vitro fertilization (IVF) are not lower in aborters who conceived by IVF. In: The First Congress on Controversies in Obstetrics Gynecology & Infertility, International Proceedings Division. Eds. Ben-Rafael Z, Shoham Z. Monduzzi Editore. Pgs.17-20, 1999.

61. Check JH, Dietterich C, Lurie D: Non-homogeneous hyperechogenic pattern 3 days after embryo transfer is associated with lower pregnancy rates. Hum Reprod 15:1069-1074, 2000.

62. Check JH, Choe JK, Katsoff D, Summers-Chase D, Wilson C: Controlled ovarian hyperstimulation adversely affects implantation following in vitro fertilization-embryo transfer. J Assist Reprod Genet 16:416-420, 1999.

63. Check JH, Dietterich C, Lurie D, Nazari A: No evidence of increased uterine vascular impedance with patient ageing following IVF. Hum Reprod 15:1679-1684, 2000.

64. Check JH, Summers D, Nazari A, Choe J: Successful pregnancy following in vitro fertilization-embryo transfer despite imminent ovarian failure. Clin Exp Obst Gyn 27:97-99, 2000.

65. Check JH, Choe JK, Nazari A, Summers-Chase D: Ovarian hyperstimulation can reduce uterine receptivity. A case report. Clin Exp Obst Gyn 27:89-91, 2000.

66. Dietterich C, Check JH, Lurie D, Choe JK, Nazari A: A study to determine if certain sonographic uterine parameters are associated with multiple gestation. Gynecol Obstet Invest 50:242-246, 2000.

67. Check JH, Katsoff D, Brittingham D, Summers-Chase D, Wilson C: Comparable implantation rates with fresh vs frozen embryo transfer suggests that controlled ovarian hyperstimulation has an adverse effect on conception outcome. Clin Exp Obst & Gyn 27:173-175, 2000.

68. Dietterich C, Check JH, Choe JK, Nazari A, Fox F: The presence of small uterine fibroids not distorting the endometrial cavity does not adversely affect conception outcome following embryo transfer in older recipients. Clin Exp Obst Gyn 27:168-170, 2000.

69. Kiefer DG, Check JH: Salpingectomy improves outcome in the presence of a unilateral hydrosalpinx in a donor oocyte recipient. A case report. Clin Exp Obst Gyn 28:71-72, 2001.

70. Check ML, Check JH, Summers-Chase D: A successful pregnancy from zygotes cryopreserved for >9 years: Case Report. Clin Exp Obst Gyn 28:91, 2001.

71. Check JH, Wilson C, Summers-Chase D, Choe JK, Nazari A, Lurie D: Pregnancy rates (PRs) according to embryo cell number at time of embryo transfer (ET). Clin Exp Obst Gyn 28:73-77, 2001.

72. Check JH, Choe JK, Nazari A, Fox F, Swenson K: Fresh embryo transfer is more effective than frozen for donor oocyte recipients but not for donors. Hum Reprod 16:1403-1408, 2001.

73. Check JH, Check ML, Nazari P, Davies E, Choe JK: Presence of LH in gonadotropins associated with higher IVF pregnancy rates when basal serum LH is increased. Clin Exp Obst Gyn 28:102-106, 2001.

74. Lurie D, Check JH, Nazari A, Choe JK, Lee G: Cumulative pregnancy rates after four embryo transfers of either fresh or frozen embryos. Clin Exp Obst Gyn 28:148-152, 2001.

75. Choe JK, Nazari A, Check JH, Summers-Chase D, Swenson K: Marked improvement in clinical pregnancy rates following in vitro fertilization-embryo transfer seen when transfer technique and catheter were changed. Clin Exp Obst Gyn 28:223-224, 2001.

76. Wilson C, Check ML, Check JH, Kiefer D, Choe JK: Recombinant FSH (Especially Gonal-F) may adversely effect the uterine environment. Reprinted from: 12th World Congress on In Vitro Fertilization and Molecular Reproduction, Ed. Anibal A. Acosta, Monduzzi Editore, International Proceedings Division. Pgs. 185-189, 2002.

77. Dietterich C, Check JH, Choe JK, Nazari A, Lurie D: Increased endometrial thickness on the day of human chorionic gonadotropin injection does not adversely affect pregnancy or implantation rates following in vitro fertilization-embryo transfer. Fertil Steril 77:781-786, 2002.

78. Check JH, Nazari P, Check ML, Choe JK, Liss JR: Prognosis following in vitro fertilization-embryo transfer (IVF-ET) in patients with elevated day 2 or 3 serum follicle stimulating hormone (FSH) is better in younger vs older patients. Clin Exp Obst Gyn 29:42-44, 2002.

79. Check JH, Choe JK, Lee G, Dietterich C: The effect on IVF outcome of small intramural fibroids not compressing the uterine cavity as determined by a prospective matched control study. Hum Reprod 17:1244-1248, 2002.

80. Check JH, Nazari P, Check ML, Szekeres-Bartho J, Yuan W: Evidence that the adverse effect of controlled ovarian hyperstimulation on successful pregnancy outcome following embryo transfer may be related to premature trophoblast invasion. Clin Exp Obst Gyn 29:83-86, 2002.

81. Check JH, Kiefer D, Summers-Chase D, Check M, Choe JK: A study to determine if embryo cryopreservation influences the potential of rapidly growing embryos to successfully implant in uterine environments not influenced by controlled ovarian hyperstimulation. Clin Exp Obst Gyn 29:113-114, 2002.

82. Check M, Wilson C, Check JH, Kiefer D, Choe JK: Evidence that exclusive use of Follistim may produce better pregnancy results than the use of Gonal-F following in vitro fertilization (IVF)-embryo transfer (ET). Clin Exp Obst Gyn 29:183-184, 2002.

83. Check JH: The shared donor oocyte program: the advantages and insights it provides in determine etiologic factors of infertility. Clin Exp Obst Gyn 29:229-234, 2002.

84. Check JH, Summers-Chase D, Nazari A, Kiefer D, Swenson K: The importance of number of blastomeres when embryos are transferred in the absence of controlled ovarian hyperstimulation. Clin Exp Obst Gyn 29:257-258, 2002.

85.  Check JH, Swenson K, Summers-Chase D, Choe JK, Yuan W: Effect of transferring frozen-thawed embryos resulting from fertilization of immature oocytes matured one day in culture prior to intracytoplasmic sperm injection (ICSI) on implantation rates. Clin Exp Obst Gyn 30:197-198, 2003.

86  Check JH, Grazianno V, Lee G, Nazari A, Choe JK, Dietterich C: Neither sildenafil nor vaginal estradiol improves endometrial thickness in women with thin endometria after taking oral estradiol in graduating dosages. Clin Exp Obst Gyn 31:99-102, 2004.

87.  Summers-Chase D, Check JH, Swenson K, Yuan W, Brittingham D, Barci H: A comparison of in vitro fertilization outcome by culture media used for developing cleavage-stage embryos. Clin Exp Obst Gyn 31:179-182, 2004.

88.  Check ML, Check JH, Choe JK, Davies E, Kiefer D: Effect of antagonists vs. agonists on in vitro fertilization outcome. Clin Exp Obst Gyn 31:257-259, 2004.

89.  Check JH, Dietterich C, Graziano V, Lurie D, Choe JK: Effect of maximal endometrial thickness on outcome after frozen embryo transfer. Fertil Steril 81:1399-1400, 2004.

90.  Check JH, Choe JK, Katsoff B, Krotec JW, Nazari A: Ectopic pregnancy is not more likely following fresh vs. frozen embryo transfer. Clin Exp Obst Gyn 32:95-96, 2005.

91.  Check JH, Katsoff B, Davies E, Choe JK: No association of serum progesterone (P) levels on the day of human chorionic gonadotropin (hCG) injection and pregnancy outcome following in vitro fertilization-embryo transfer (IVF-ET) in stimulation protocols using ganirelix in patients of an older reproductive age. In:  In Vitro Fertilization and Assisted Reproduction & Genetics.  Proceedings of the 13th World Congress on In Vitro Fertilization and Assisted Reproduction & Genetics.  Monduzzi Editore.  Pgs.  237-239, 2005.

92.  Check JH, Katsoff B, Davies E, Kiefer D: Higher implantation rates using a simplified embryo transfer cryopreservation protocol with one-step removal of cryoprotectant when freezing at the 2 pronuclear stage vs. multi-cell stage. In:  In Vitro Fertilization and Assisted Reproduction & Genetics, Proceedings of the 13th World Congress on In Vitro Fertilization and Assisted Reproduction & Genetics.  Monduzzi Editore.  Pgs. 331-334, 2005.

93.  Katsoff B, Wiesak T, Check JH, Krotec JW, Kiefer D: The effect of the serum progesterone level at the time of human chorionic gonadotropin injection on pregnancy outcome using ovarian hyperstimulation protocols with gonadotropin releasing hormone antagonists on pregnancy rates following embryo transfer. In:  In Vitro Fertilization and Assisted Reproduction & Genetics, Proceedings of the 13th World Congress on In Vitro Fertilization and Assisted Reproduction & Genetics.  Monduzzi Editore.  Pgs 241-243, 2005.

94.  Katsoff B, Check JH, Choe JK, Wilson C: A novel method to evaluate pregnancy rates following in vitro fertilization to enable a better understanding of the true efficacy of the procedure. Clin Exp Obst Gyn 33:213-216, 2005.

95.  Wilson C, Check JH, Summers-Chase D, Swenson K: Successful pregnancies from embryos cryopreserved more than ten years:  two case reports. Clin Exp Obst Gyn 33:79-80, 2006.

96.  Check JH, Summers-Chase D, Yuan W, Horwath D, Wilson C: Effect of embryo quality on pregnancy outcome following single embryo transfer inw omen with a diminished egg reserve. Fertil Steril 87:749-756, 2007.


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