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1 대한생식의학회지 : 제 34 권제 3 호 2007 난소의기능이저하된불임환자에서연령및기저혈중 FSH 수치가체외수정시술의예후에미치는영향에관한연구 관동대학교의과대학제일병원산부인과학교실 유영 김민지 조연진 연명진 안영선 차선화 김혜옥 박찬우김진영 송인옥 궁미경 강인수 전종영 양광문 Age or Basal Serum FSH Levels; Which One is Better for Prediction of IVF Outcomes in Patients with Decreased Ovarian Reserve? Young Yu, Min Ji Kim, Yeon Jean Cho, Myeong Jin Yeon, Young Sun Ahn, Sun Hwa Cha, Hye Ok Kim, Chan Woo Park, Jin Young Kim, In Ok Song, Mi Kyoung Koong, Inn Soo Kang, Jong Young Jun, Kwang Moon Yang Department of Obstetrics and Gynecology, Cheil General Hospital & Women's Healthcare Center, Kwandong University, College of Medicine, Seoul, Korea Objectives: The purpose of this study is to investigate the clinical significance of age and basal serum FSH in predicting the outcomes of in vitro fertilization (IVF) in patients with poor-ovarian response. Methods: From January 2000 to December 2004, 85 second IVF cycles of 85 poor-ovarian response patients under the age of 42 with a back-ground of the first IVF cycles at our infertility center and 5 or less oocytes were retrieved and their basal serum FSH levels of 15~25 miu/ml were enrolled in this study. Exclusion criteria were patients with a male factor for the etiology of infertility and undergoing genetic diagnosis of embryo such as PGD. Flare-up protocol was used for ovarian stimulation in all cases. Results: When we stratified the study groups by patient's age, the younger age group (age < 35, n=35) showed significantly higher implantation rate (19.0% versus 4.0%, p<0.05) and higher ongoing pregnancy rate (100% versus 14.3%, p<0.05) than the older age group (age 35, n=50). And then, when we stratified the study populations by basal serum FSH level, the lower FSH group (basal serum FSH < 20 miu/ml, n=58) showed significantly higher number of retrieved oocytes (4.6±0.7 versus 2.2±0.5, p<0.05) and lower cancellation rate (19.0% versus 55.6%, p<0.05) than higher FSH group (basal serum FSH 20 miu/ml, n=27). Conclusions: In conclusion, it was suggested that the patient's age could predict the IVF outcomes in respect to its potency of pregnancy and ongoing pregnancy. Serum basal FSH levels could predict more accurately the ovarian response of cycle, but not clinical outcomes. [Korean. J. Reprod. Med. 2007; 34(3): ] Key Words: Poor ovarian response, IVF-ET, Age, FSH 최근보조생식술의비약적인발전에도불구하고체외수정시술및배아이식술시행후임신성공율 주관책임자 : 양광문, 우 ) 서울특별시중구묵정동 1-19, 제일병원의학연구소 2 층 Tel: (02) , Fax: (02) ykm2955@yahoo.co.kr 은 30~40% 정도에불과한실정이며, 이는과배란유도에반응이미약한난소기능이저하된환자에서의체외수정후임신성공율이낮은것이전체임신율을증가시키는노력에가장큰장애요인으로작용하고있다. 한편난소반응이저하된군으로

2 난소기능이저하된불임환자에서체외수정시술의예후인자에관한연구 대한생식의학회지 분류할수있는환자는전체불임환자중 9~24% 로조사되며, 1 소위 ' 난소저반응군 ' 으로분류될수있는환자들의가장보편적인기준은체외수정주기의반복적인취소로볼수있지만난자의채취가가능하였다고해도그예후는불량한공통적인특징을갖는다. 2 보통 ' 난소저반응군 ' 은연령증가와연관된생식능력의감소가가장흔하게동반되지만젊은여성에서도드물게관찰되는현상은아니며, 3 젊은여성의경우혈중 FSH의증가가흔히동반되지만일부에서는 FSH의증가를확인할수없으며다른특별한원인없이다양한방법의과배란유도에반복적으로낮은반응을보이는경우도있다. 4,5 이러한성선자극호르몬을이용한과배란에불량한반응을보이는 ' 난소저반응군 ' 의성공적인임신을위한적절한치료는최근불임환자의치료에있어서가장큰과제중의하나로남아있다. 난소기능의저하는여러예측가능한임상결과를초래하는데, 그정도가아주심하지않는경우에서는약제의투여용량을늘리거나방법을바꿀경우난자채취를향상시킬수도있지만, 심한경우성선자극호르몬등의배란유도약제에반응이심하게저하되어있으며이러한경우약제의용량을늘려도잘반응하지않는다. 그동안난소기능이저하된 ' 난소저반응군 ' 에서난소자극에대한효과를증가시키기위한다양한방법들이제안되어왔으며, 과배란유도시사용되는외인성성선자극호르몬의용량을증가시키거나, clomiphene citrate 와 hmg 병용요법, 성선자극호르몬유리호르몬촉진제장기병합요법또는초단기요법, 성선자극호르몬유리호르몬길항제의사용, 성장호르몬의투여등을시도하여왔으나이중어느방법도정상반응군에서관찰되는임상결과에는현저히미치지못하는상태이다. 한편 ' 난소저반응군 ' 을미리진단하기위해서여러보고자들에의해 growth hormone, 6 insulin-like growth factor-i, 7 Müllerian inhibitory substance, 8 inhibin B, 9 antral follicle 숫자, 10 난소용적 11 등의계측등여 러가지방법이제시되어왔으며, 그중현재까지가장보편적으로이용되는방법은혈중 FSH를측정하는방법이지만이는생리주기당변이가많으며해당주기의난소반응을예측하는데민감도와특이도에한계를가지고있다는보고도있다. 12,13 본연구에서저자들은 ' 난소저반응군 ' 으로진단된불임환자에서체외수정시술시그결과의예측인자로서환자의연령과혈중 FSH 수치의중요성및그임상적인의미를알아보고자하였다. 연구대상및방법 1. 연구대상본연구는 2000년 1월부터 2004년 12월까지본원불임센터에서체외수정시술을시행받은환자중이전체외수정시술주기에서획득된난자숫자가 5개이하이며기저호르몬검사상 FSH 농도가 15 miu/ml 이상으로난소기능이저하된불임환자 85 명의 85 체외수정시술주기를연구대상으로하였다. 연구대상은연령이 42세이하이고기저 FSH 농도가 25 miu/ml 이하이며불임의원인이여성요인에있는경우, 체외수정시술시행의적응증이수정란의유전적검사즉착상전유전진단이아닌경우, 모든경우에있어체외수정을위한과배란유도의방법은단기요법 (flare-up protocol) 을사용한경우로제한하였다. 동일한연구대상군을연령및혈중기저 FSH 농도등두가지기준에의해각각두군으로분류하였는데, 연령에따라 35세미만군 (N=35) 및 35세이상군 (N=50) 과기저혈중 FSH 농도에기준하여 20 miu/ml 미만군 (N=58) 및 20 miu/ml 이상군 (N=27) 으로분류하여분류기준이동일한두군사이의획득난자숫자, 이식배아숫자, 임신율, 착상률, 주기취소율, 지속임신율등의체외수정시술의결과를각각비교분석하였다

3 제 34 권제 3 호, 2007 유영 김민지 조연진 연명진 안영선외 9 인 2. 연구방법 1) 단기요법에의한과배란유도방법 (flare-up protocol) 월경주기 2~3일째부터 GnRH agonist (Suprefact, Hoechest, Germany) 를매일피하주사하였으며월경주기 3일째부터 gonadotropin (Puregon, Organon, Netherland) 6 ample (300 IU) 을매일투여하였다. 생리 7~8일째부터초음파검사및혈중 estradiol 농도를측정하였으며우성난포의직경이 18 mm 이상인경우 hcg 10,000 IU를근육주사하였고투여당일혈중 estradiol을측정하였다. 2) 난자채취 hcg 투여 36시간후질식초음파를이용한경질난자채취방법을통해난포액을채취하였다. 채취된난포액은난포액수집용기에흡입후배양접시에옮겨담아해부현미경으로난자의존재여부를확인하고난자의형태및성숙정도를확인하였다. 3) 배아의자궁내이식정상적으로수정된배아에서난할을관찰하였으며난자채취 2~3일에양질의배아를골라복식초음파및이식도관을이용하여환자의자궁내에이식하였다. 4) 임신및지속임신의판정체외수정시술후임신여부는배아이식 9일후혈청내 β-hcg를측정하여그수치가 5 miu/ml 이상시임신으로판정하였다. 지속임신은난자채취 3주후시행한경질초음파상임신낭이발견되고이후임신 20주이상임신이지속된경우로정의하였다. 5) 체외수정및배아이식술주기의취소체외수정시술해당생리주기 7~8일에경질초음파검사상 10 mm 이상의원시난포가발견되지않고혈청 estradiol 농도가 50 pg/ml 이하인경우해당체외시술주기를취소하였으며, 난자채취에실패한경우및난자채취후배아이식에적절한배아의형성에실패한경우도체외수정시술취소주기에포함하였다. 6) 결과분석후향적으로의무기록분석을시행하였으며, 연구결과에대한통계학적분석은 SPSS를사용하여실시하였다. 프로그램은 student's t-test를이용하였으며, p-value가 0.05 이하인경우통계학적유의성이있는것으로판정하였다. 결과 1. 연구대상군의임상적인특징및체외수정시술결과연구대상군의평균연령은 36.1세였고월경주기 2~3일에측정한평균기저혈중 FSH 농도는 18.8 miu/ml이며과배란유도에사용된성선자극호르몬의양은평균 3145 IU였고 hcg 투여당일검사한혈중 estradiol 농도는평균 851 pg/ml였다. 한편채취된난자의평균수는 4.0개이었으며수정후획득한양질의배아수는평균 1.0개이었고평균배아이식숫자는 3.0개였다. 체외수정시술결과전체 85주기중 26주기에서배아이식에이르지못하고주기가취소되어전체의주기취소율은 30.6% 였으며주기가취소되지않고진행된 59주기중 16주기에서임신에성공하여이식주기당임신율은 27.1% (16/59) 를보였고체외수정시작주기당임신율은 18.8% (16/85), 전체주기의착상률은 10% 를보였다. 2. 연령을기준으로분류한각군간의임상적인특징및체외수정결과비교연구대상군을연령을기준으로분류하여비교해본결과 35세미만군의평균연령은 31.8±2.4세로 35세이상군의평균연령 39.1±2.3세에비해유의하게낮았으나기저혈중 FSH, LH, estradiol 등은양군간에유의한차이를보이지않았다. 한편 hcg 투여당일혈중 estradiol 농도, 사용된성선자극호르몬의총용량, 획득된난자수, 양질의배아수, 이식된배아의수등에서도양군간의유의한차이를볼수없었다 (Table 1)

4 난소기능이저하된불임환자에서체외수정시술의예후인자에관한연구 대한생식의학회지 Table 1. Patients' characteristics and IVF outcomes stratified by patients' age Age < 35 (n=35) Age 35 (n=50) P value Age 31.8± ±2.3 p<0.05 Basal serum FSH (miu/ml) 19.1± ±2.9 NS Basal serum LH (miu/ml) 4.8± ±2.6 NS Basal serum estradiol (pg/ml) 17.1± ±7.6 NS Serum estradiol at hcg day (pg/ml) 866.0± ±116.6 NS Dose of used gonadotropins (IU) ± ±228.6 NS Number of retrieved oocytes 4.6± ±0.5 NS Number of good quality embryo 0.75± ±0.1 NS Number of transferred embryo 2.8± ±0.2 NS Cycle cancellation rate (%) 31.4 (11/35) 30.0 (15/50) NS Pregnancy rate per attempted cycle (%) 25.7 ( 9/35) 14.0 ( 7/50) NS Pregnancy rate per embryo transfer (%) 37.5 ( 9/24) 20.0 ( 7/35) NS Implantation rate (%) p<0.05 Ongoing pregnancy rate (%) ( 9/9) 14.3 ( 1/7) p<0.05 Value are means ± SD, NS: not significant 체외수정시술후결과를비교한결과착상률이 35세미만군에서 19% 인반면 35세이상군에서 4% 를보여통계학적으로유의하게 35세이상군에서낮았으며지속임신율은 35세미만군에서 100% 인반면 35세이상군에서 14.3% 를보여 35세이상군에서통계적으로의미있게낮은결과를보였다. 반면체외수정시작주기당임신율및배아이식주기당임신율, 체외수정주기취소율등은양군간의유의한차이를보이지않았다 (Table 1). 3. 기저혈중 FSH 농도를기준으로분류한각군간의임상적인특징및체외수정결과비교연구대상군을기저혈중 FSH 농도를기준으로분류하여비교해본결과 20 miu/ml 미만군의평균기저혈중 FSH 농도는 20 miu/ml 미만군에서 17.1±1.2로 20 miu/ml 이상군의 22.4±4.3에비해유의하게낮았으며, 기저혈중 LH 농도도 3.9±2.0 과 5.6±2.7로통계적으로유의한차이를보였다. 한편 hcg 투여당일혈중 estradiol 농도및획득된난자숫자또한 20 miu/ml 미만군에서 999.1± 및 4.6±0.7로 20 miu/ml 이상군의 518.4± 및 2.2±0.5 보다유의하게높은결과를보였다. 반면환자의연령, 획득된양질의배아숫자, 이식된배아숫자, 사용된성선자극호르몬의총용량등은양군간의유의한차이를볼수없었다 (Table 2). 체외수정시술후결과를비교한결과주기취소율이 20 miu/ml 미만군에서 19.0% (11/58) 인반면 20 miu/ml 이상군에서 55.6% (15/27) 를보여 20 miu/ml 이상군에서통계학적으로유의하게높은반면착상률, 시작주기당임신율, 배아이식주기당임신율, 지속임신율등은양군간에통계적으로유의한차이를볼수없었다 (Table 2)

5 제 34 권제 3 호, 2007 유영 김민지 조연진 연명진 안영선외 9 인 Table 2. Patients' characteristics and IVF outcomes stratified by basal FSH levels FSH < 20 (n=58) FSH 20 (n=27) Age 36.1± ±4.3 NS P value Basal serum FSH (miu/ml) 17.1± ±2.0 p<0.05 Basal serum LH (miu/ml) 3.9± ±2.7 p<0.05 Basal serum estradiol (pg/ml) 17.6± ±8.5 NS Serum estradiol at hcg day (pg/ml) 999.1± ±127.1 p<0.05 Dose of used gonadotropins (IU) ± ±409.5 NS Number of retrieved oocytes 4.6± ±0.5 p<0.05 Number of good quality embryo 0.7± ±0.1 NS Number of transferred embryo 2.6± ±0.4 NS Cycle cancellation rate (%) 19.0 (11/58) 55.6 (15/27) p<0.05 Pregnancy rate per attempted cycle (%) 22.4 (13/58) 11.1 ( 3/27) NS Pregnancy rate per embryo transfer (%) 27.7 (13/47) 25.0 ( 3/12) NS Implantation rate (%) NS Ongoing pregnancy rate (%) 69.2 ( 9/13) 33.3 ( 1/3) NS Value are means ± SD, NS: not significant 고찰체외수정을통해임신을성공할수있는필수적인요소로외인성성선자극호르몬에대한적절한난소의반응및그결과에기인한하나이상의건강한난포의성장이요구된다. 최근까지보조생식술이크게발전해오면서전체적인임신율을향상시키기위해많은노력이있어왔으며특히높은기저혈중 FSH 농도를보이고, 혈중 estradiol 농도는낮은특징을보이며, 고용량의성선자극호르몬의사용에도불구하고난포의수및획득되는난자의수가적어결국체외수정시술의결과가불량한특징을가지는, 14,15 난소기능저하환자들의임신율을향상시키기위한많은연구가진행되어왔고그결과이를개선시키기위한여러방법이제시되었다. 하지만고령환자에서는외인성성선자극호르몬에대한난소반응이미약하여체외수정시술이 진행중취소되는경우가흔하게볼수있으며이러한현상은젊은여성에서도그리드물게볼수있는현상은아니다. 결국, 많은비용과시간이요구되며환자들에심한정신적, 육체적스트레스로작용하는체외수정시술에대한예후및외인성성선자극호르몬에대한난소반응을정확히예측하여소위 ' 난소저반응군 ' 을진단할수있다면이는임상적, 경제적관점에서환자들에게많은도움이될것이다. 11 하지만, 환자의연령과별도로난소반응을미리예측하기위한여러가지방법들즉, 기저혹은역동적인호르몬검사, 초음파를통한난소의용적측정및원시난포의관찰심지어는난소의생검등이연구되었으나불행하게도이중절대적으로난소반응을예측할수있는검사방법은없으며, 2 최근에는소위 ' 난소저반응군 ' 의진단은오로지난소의과배란유도시행후진단가능하다는관점이오히려강조되고있는실정이다

6 난소기능이저하된불임환자에서체외수정시술의예후인자에관한연구 대한생식의학회지 월경주기 2~3일에측정되는기저혈중 FSH 검사는체외수정시술을시행하는환자들의난소반응을예측하는지표로널리사용되며기저혈중 FSH 농도가높은경우해당체외수정주기의결과는낮은임신율이기대되고, 17 난소의보유능이저하된현상을표시하는한지표로해석할수있으며, 반복적인검사상기저혈중 FSH 농도의증가는난소내부의기능상의문제를표현하므로그수치의변화를기대하는것은체외수정시술의예후의향상을기대할수없다는연구결과가있는반면, 13 기저혈중 FSH 농도가증가되었던환자에서그수치가정상으로돌아온경우체외수정시술시좋은결과를얻었다는보고도있었다. 18 한편, 난소의반응정도는단순한호르몬의변화가아닌원시난포의숫자에의해결정되며그중기저혈중 FSH 농도는난소보유능의감소를의미하는직접적인지수는아니며난소의반응을예측하는가장좋은진단방법으로원시난포의숫자를측정하는방법이기저혈중 FSH 측정보다우위에있다는연구결과가보고되기도하였다. 19 환자의연령및기저혈중 FSH 농도의증가는난소의기능감소와체외수정시술에대한불량한결과와연관되고난소반응또는 ' 난소보유능 ' 의감소는난소의원시난포의감소에그원인이있으며초경시 250,000개이상이던원시난포는환자의나이 37세혹은폐경전 10~12년부터현저하게감소되지만, 20 개인간의원시난포의숫자와원시난포의고갈되는속도에는많은차이가있어연령및규칙적인월경유무가난소의보유능및난소반응을예측하는정확한지표는될수없다는연구결과도있다. 결국환자의연령및기저혈중 FSH 농도그중어느것도난소의기능의정상혹은난소보유능의감소여부를진단하는확실한진단방법은될수없다고보고하였다. 21 저자들은본연구에서난소기능이저하된불임환자에서환자의연령및기저혈중 FSH 농도가체외수정시술의결과에미치는임상적인영향과의미를알아보고그중체외수정의예후에대한임 상적인지표로서의우월성을조사하고자하였다. 본연구에서동일한환자군의체외수정시술주기를연령및기저혈중 FSH 농도에따라분석한결과환자의연령이증가된군에서연령이낮은환자에비해낮은착상률및낮은지속임신율을보인반면, 기저혈중 FSH를기준으로볼때기저혈중 FSH가높은환자에서는낮은환자에비해획득한난자의숫자가적으며체외수정주기의취소율은높은결과를보여결국, 체외수정시술주기에서환자의연령이갖는임상적인의미는난소의반응과는크게관련되지않은임신및임신지속여부에관한예후에대한지표가될수있는반면, 기저혈중 FSH는해당주기에서외인성성선자극호르몬에대한난소의반응과연관이있다는것으로해석가능하며이러한결과는기저혈중 FSH는난자를생산할수있는능력과연관된반면환자의연령은난자의질적인면즉, 임신의가능성여부와연관된다는 Chuang 등의최근연구결과와일치한다. 22 한편, 결과에서나타난획득된양질의배아의수및배아이식당임신율에서연령차이군간의의미있는차이가없었다는결과는본연구의결론에부합되지않지만이는연구대상군의숫자가적음에기인한결과로사료되며, 그연구대상군을확대함으로서본결론에부합하는결과를얻을수있으리라생각된다. 결론적으로난소반응이저하된불임환자의체외수정시술시그예후에관련된인자로서환자의연령은해당주기의임신및임신지속여부에대한예후를예측할수있는인자로서의미가있는반면기저혈중 FSH 농도는해당주기에서의외인성성선자극호르몬에대한난소의반응에대한예측인자로써활용이가능할것으로사료되지만본연구의결론을확인하는보다큰규모의연구군을대상으로한전향적연구가필요하리라생각된다. 참고문헌 1. Keay SD, Liversedge NH, Mathur RS, Jenkins JM. Assisted

7 제 34 권제 3 호, 2007 유영 김민지 조연진 연명진 안영선외 9 인 conception following poor ovarian response to gonadotropin stimulation. British Journal of Obstetrics and Gynecology 1997; 104: Tarlatzis BC, Zepiridis L, Grimbizis G, Bontis J. Clinical management of low ovarian response to stimulation for IVF: a systemic review. Hum Reprod Update 2003; 9: Fasouliotis SJ, Simon A, Laufer N. Evaluation and treatment of low responders assisted reproductive technology: a challenge to meet. J Assist Reprod Genet 2000; 17: Cameron IT, O'Shea FC, Rolland JM, Hughes EG, de Krester DM, Healey DL. Occult ovarian failure: a syndrome of infertility, regular menses and elevated follicle-stimulating hormone concentrations. J Clin Endocrinol Metab 1988; 67: Frattarelli JL, Peterson E. Effect of androgen levels on in vitro fertilization cycles. Fertil Steril 2004; 81: Stone BA, Marrs RP. Ovarian responses to menopausal gonadotrophins in groups of patients with differing basal growth hormone levels. Fertil Steril 1992; 58: Keay SD, Liversedge NH, Akande VA, Mathur RS, Jenkins JM. Serum insulin-like growth facter I concentrations following pituitary desensitization do not predict the ovarian response to gonadotrophin stimulation prior to IVF. Hum Reprod 2003; 18: Seifer DB, MacLaughlin DT, Christian BP, Feng B, Shelden RM. Early follicular serum mullerian-inhibiting substance levels are associated with ovarian response during assisted reproductive technology cycles. Fertil Steril 2002; 77: Seifer DB, Lambert-Messerlian G, Hogan JW, Gardiner AC, Blazar AS, Berk CA. Day 3 serum inhibin-b is predictive of assisted reproductive technologies outcome. Fertil Steril 1997; 67: Thomas C, Nuojua-Huttunen S, Martikainen F. Pretreatment transvaginal ultrasound examination predicts ovarian responsiveness to gonadotrophins in in-vitro fertilization. Hum Reprod 1997; 12: Lass A, Skull J, Mc Veigh E, Margara R, Winston RM. Measurement of ovarian volume by transvaginal sonography before ovulation induction with human menopausal gonodrophin for in-vitro fertilization can predict poor response. Hum Reprod 1997; 12: Akande VA, Fleming CF, Hunt LP, Keay SD, Jenkins JM. Biological versus chronological aging of oocytes, distinguishable by raised FSH levels in relation to the success of IVF treatment. Hum Reprod 2002; 17: Scott RT, Hofmann GE, Oehninger S, Muasher SJ. Intercycle variability of day 3 follicle-stimulating hormone levels and its effect on stimulation quality in in-vitro fertilization. Fertil Steril 1990; 54: Karande V, Jones G, Veeck L, Mausher S. High dose FSH stimulation at the onset of the menstrual ctcle dose not improve IVF outcome of low reponder patients. Fertil Steril 1990; 53: Cameron IT, O'shea FC, Rolland JM, Hughues EG, dekrester DM, Healy DL. Occult ovarian failure: a syndrome of infertility, regular menses, and elevated FSH concentrations. J Clin Endocrinol Metab 1988; 67: Scott RT, Hofmann GE. Prognostic assessment of ovarian reserve. Fertil Steril 1995; 63: Sharif K, Afnan M. The IVF league tables: time for a reality check. Hum Reprod 2003; 18: Lass A, Gerrard A, Abusheikha N, Akagbosu F, Brinsden P. IVF performance of women who have fluctuating early follicular FSH levels. J Assist Reprod Genet 2000; 17: Bancis LF, Huijs AM, den Ouden CT, Broekmans FJ, Looman CW, Blankenstein MA, et al. Basal follicle-stimulating hormone levels are of limited value in predicting ongoing pregnancy rates in vitro fertilization. Fertil Steril 2000; 73: Richardson SJ, Senikas V, Nelson JF. Follicular depletion during the menopausal transition: evidence for accelerated loss and ultimate exhaustion. J Clin Endocrinol Metab 1987; 65: Wallach EE. Pitfalls in evaluating ovarian reserve. Fertil Steril 1995; 63: Chuang C, Chen C, Chao K, Chen S, Ho H, Yang Y. Age is a better predictor of pregnancy potential than basal folliclestimulating hormone levels in women undergoing in vitro fertilization. Fertil Steril 2003; 79:

8 난소기능이저하된불임환자에서체외수정시술의예후인자에관한연구 대한생식의학회지 = 국문초록 = 목적 : 본연구의목적은난소기능이저하된불임환자에서체외수정시술시그결과의예측인자로서환자의연령과혈중 FSH 수치의중요성및그임상적인의미를알아보고자하였다. 연구방법 : 2000년 1월부터 2004년 12월까지본원불임센터에서체외수정시술을시행받은환자중이전체외수정시술주기에서획득된난자수가 5개이하이며 FSH 농도가 15 miu/ml 이상 25 miu/ml 이하로그연령이 42세이하인난소기능이저하된불임환자 85명의 85 체외수정시술주기를연구대상으로하였다. 남성요인의불임이나착상전유전진단인경우는제외시켰다. 과배란유도의방법은단기요법 (flare-up protocol) 을사용한경우로제한하였다. 결과 : 대상군을환자의나이에따라분류하여분석하였을때환자의연령이낮은군 (age < 35, n=35) 에서고령환자군 (age 35, n=50) 에비해통계적으로의미있게높은착상률 (19.0% versus 4.0%, p<0.05) 과높은지속임신율 (100% versus 14.3%, p<0.05) 을보였으며, 연구대상군을기저혈중 FSH 농도에의해두군으로비교하였을때낮은기저혈중 FSH를가진군 (basal serum FSH < 20 miu/ml, n=58) 에서기저혈중 FSH가높았던군 (basal serum FSH 20 miu/ml, n=27) 에비해획득된난자숫자는통계적으로의미있게높은반면 (4.6±0.7 versus 2.2±0.5, p<0.05) 주기취소율은의미있게낮은 (19.0% versus 55.6%, p<0.05) 결과를보였다. 결론 : 난소반응이저하된불임환자의체외수정시술시그예후에관련된인자로서환자의연령은해당주기의임신성공및임신지속여부에대한예후를예측할수있는인자로서의미가있는반면기저혈중 FSH 농도는해당주기에서의난소의반응에대한예측인자로써활용이가능할것으로사료된다. 중심단어 : 저반응, 시험관아기, 연령, 난포자극호르몬

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