Abstract:
:Two models of levonorgestrel-releasing intrauterine devices were studied. Model A was designed to deliver 20 micrograms/day, and model B was designed to deliver 30 micrograms/day. Plasma concentrations of levonorgestrel were determined in blood samples taken from women who used the levonorgestrel-releasing intrauterine devices (IUDs) and who participated in a clinical trial for more than 5 years. During clinical studies IUDs have been removed for various reasons between 8 and 40 months after insertion. The rate of release of levonorgestrel from the IUDs was calculated by determining the remaining amount of levonorgestrel. Plasma concentrations of levonorgestrel ranged between a mean +/- standard deviation (SD) concentration of 166 +/- 75 pg/ml and 131 +/- 32 pg/ml for the first 18 months of use and between 101 +/- 37 pg/ml and 74 +/- 15 pg/ml at 24 and 60 months after insertion of the IUD. The plasma concentrations from 24 months through 60 months were significantly lower than concentrations measured during initial months of IUD use, but not between the two devices. There was a strong correlation between the time of use and the amount of levonorgestrel lost from the IUDs. The calculated mean daily release of levonorgestrel was 17.6 micrograms for model A and 22.2 micrograms for model B. This gives a calculated lifetime of more than 6 years for a levonorgestrel-releasing IUD. :2 models of levonorgestrel-releasing IUDs were studied. Model A was designed to deliver 20 mcg/day and model B 30 mcg/day. Plasma concentrations of levonorgestrel were determined in blood samples taken from who had used the levonorgestrel-releasing IUDs and who had participated in a clinical trial for more than 5 years. During clinical studies, IUDs have been removed for various reasons between 8-40 months after insertion. The rate of release of levonorgestrel from the IUDs was calculated by determining the remaining amount of levonorgestrel. Plasma concentrations of levonorgestrel ranged between a mean +or- standard deviation concentration of 166 +or- 75 pg/ml and 131 +or- 32 pg/ml for the 1st 18 months of use and between 101 +or- 37 pg/ml and 74 +or- 15 pg/ml at 24 and 60 months after IUD insertion. Plasma concentrations from 24 to 60 months were significantly lower than concentrations measured during the initial months of IUD use, but not between the 2 devices. There was a strong correlation between the time of use and the amount of levonorgestrel lost from the IUDs. The calculated mean daily release of levonorgestrel was 17.6 mcg for model A and 22.2 mcg for model B. This gives a calculated lifetime of more than 6 years for a levonorgestrel-releasing IUD.
journal_name
Fertil Steriljournal_title
Fertility and sterilityauthors
Nilsson CG,Lahteenmaki PL,Luukkainen T,Robertson DNdoi
10.1016/s0015-0282(16)49397-0subject
Has Abstractpub_date
1986-06-01 00:00:00pages
805-7issue
6eissn
0015-0282issn
1556-5653pii
S0015-0282(16)49397-0journal_volume
45pub_type
临床试验,杂志文章abstract:OBJECTIVE:To assess correlation between blastocyst morphology and chromosomal status. DESIGN:Observational research study. SETTING:An IVF clinic and a specialist preimplanation genetic diagnosis (PGD) laboratory. PATIENT(S):Ninety-three couples undergoing IVF treatment in combination with chromosome screening of emb...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2010.04.003
更新日期:2011-02-01 00:00:00
abstract:OBJECTIVE:To evaluate the interactive effects of dietary soy and menstrual cycle phase on breast proliferation, apoptosis, and sex steroid receptor expression in premenopausal female cynomolgus monkeys. DESIGN:Animals were randomized to receive diets with either casein lactalbumin or soy as the protein source for 12 m...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2005.08.059
更新日期:2006-04-01 00:00:00
abstract::This study compares the quality, developmental capacity and global gene expression profile of embryos generated from superovulated and natural cycles. We found that ovarian stimulation impaired quality of blastocysts (cell number: 68.9 +/- 6.9 vs. 76.8 +/- 7.9; diameter of blastocysts: 145.3 +/- 76.9 microm vs. 152.6 ...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2010.03.018
更新日期:2010-05-15 00:00:00
abstract:OBJECTIVE:To characterize the BET gene expression in human testis with spermatogenetic impairments; to examine BRDT protein expression in testis and semen. DESIGN:Prospective study. SETTING:Fertility clinic. PATIENT(S):Azoospermic men (n = 120) who underwent testicular sperm extraction and who were classified as eit...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2011.10.010
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVE:To compare the euploidy outcome in patients that underwent 2 ovarian stimulation cycles with trophectoderm biopsy. DESIGN:Retrospective repeated-measures cohort study. SETTING:University-based fertility center. PATIENT(S):A total of 116 patients, from 2011 through 2013, that underwent 2 ovarian stimulation...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2014.12.126
更新日期:2015-04-01 00:00:00
abstract::Asian women have significantly higher serum E(2) levels during treatment with transdermal E(2) compared with white women. This finding suggests altered metabolic clearance of this steroid hormone. ...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2011.06.023
更新日期:2011-09-01 00:00:00
abstract:OBJECTIVE:To report a case of tubal pregnancy in a unicornuate uterus with rudimentary horn on the side of the rudiment and its pathology. DESIGN:Case report. SETTING:University hospital. PATIENT:An 18-year-old woman, primigravida, with tubal pregnancy. INTERVENTION(S):Systemic administration of methotrexate, salpi...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(99)00212-5
更新日期:1999-08-01 00:00:00
abstract:OBJECTIVE:To evaluate novel clinical markers of endometriosis including the neurotrophins brain-derived neurotrophic factor (BDNF), nerve growth factor (NGF), and neurotrophin 4/5 (NT4/5) and compare them to others previously reported in the literature including cancer antigen 125 (CA-125) and C-reactive protein (CRP)....
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2015.09.003
更新日期:2016-01-01 00:00:00
abstract:OBJECTIVE:To review the literature concerning the regulation of follicle growth, to describe a model for unifollicular ovulation based upon the information gleaned, and to discuss some clinical implications in reproductive endocrinology underscored by this expanding knowledge. DESIGN:Studies relating to follicular gro...
journal_title:Fertility and sterility
pub_type: 杂志文章,评审
doi:10.1016/s0015-0282(16)58077-7
更新日期:1996-02-01 00:00:00
abstract:OBJECTIVE:To determine the effect of sodium alginate encapsulation of rodent embryos on in vitro embryonic cleavage rates, implantation rates, and livebirth rates, and to find the in vivo degradation time for the capsules. DESIGN:Studies were conducted using both CB6F1 mice and Golden Syrian hamsters. RESULTS:Capsule...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)55814-2
更新日期:1993-03-01 00:00:00
abstract:OBJECTIVE:To compare the expression protein profile of seminal plasma from infertile men with oligoasthenoteratozoospermia (OAT) due to oxidative stress with that of healthy, fertile men to determine the proteins indicative of infertility. DESIGN:Experimental study. SETTING:University hospital and research institute....
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2013.03.048
更新日期:2013-08-01 00:00:00
abstract:OBJECTIVE:To determine if adult human endometrium possesses an intact müllerian-inhibiting substance (MIS) signal transduction system and, if so, whether MIS can modulate endometrial cell viability. DESIGN:Adult human endometrial tissue was subjected to reverse transcription polymerase chain reaction (RT-PCR) analysis...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2008.01.028
更新日期:2009-04-01 00:00:00
abstract::In this observational, case-control study in infertile women, we observed elevated serum oxidative stress that was significantly correlated with an increase in serum paraoxonase-1 activity and without any evidence of a proinflammatory reaction. These results suggest a protective role of paraoxonase-1 against inflammat...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2009.11.043
更新日期:2010-08-01 00:00:00
abstract::Antiphospholipid syndrome patients with recurrent miscarriage have an impairment in fibrinolysis demonstrated by prolonged clot lysis time (CLT) that cannot be attributed to differences in thrombin activatable fibrinolysis inhibitor (TAFI) antigen levels. Patients with unexplained recurrent miscarriage have an impairm...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2010.02.032
更新日期:2010-11-01 00:00:00
abstract:OBJECTIVE:To review the current understanding of the role the uterus plays in embryo implantation and to outline congenital anomalies and acquired diseases that impact normal uterine function. DESIGN:The publications related to the embryo implantation, Mullerian anomalies, uterine polyps, uterine synechiae, and myomas...
journal_title:Fertility and sterility
pub_type: 杂志文章,评审
doi:10.1016/j.fertnstert.2007.09.069
更新日期:2008-01-01 00:00:00
abstract:OBJECTIVE:To investigate the effect of transforming growth factor (TGF)-beta1 on the extracellular signal-regulated kinase (ERK) and Smad pathway and the role of peroxisome proliferator-activated receptor (PPAR)-gamma in cultured human endometrial stromal cells. DESIGN:Experimental study. SETTING:Infertility center o...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2007.09.010
更新日期:2008-10-01 00:00:00
abstract::A surrogate end point (e.g., a laboratory test or image) serves as a proxy for a clinical end point of importance (e.g., fracture, thrombosis, or death). Adoption and use of surrogate end points lacking validation, especially in cardiovascular medicine, have caused thousands of patients' deaths, a serious violation of...
journal_title:Fertility and sterility
pub_type: 社论,评审
doi:10.1016/j.fertnstert.2009.12.054
更新日期:2010-04-01 00:00:00
abstract::Selenium (Se) was measured in the semen of 125 men from couples consulting for infertility. A mean concentration of 71.3 +/- 29.7 ng/ml of semen was found, with a range of 7 to 230 ng/ml. More than 85% of the Se is in the seminal plasma. There was a significant positive correlation between sperm count and semen Se. Sp...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:
更新日期:1984-12-01 00:00:00
abstract:STUDY OBJECTIVE:To determine the extent to which increasing doses of exogenous testosterone (T) administered via Silastic implants can restore spermatogenesis and fertility to rats made azoospermic by active immunization against gonadotropin-releasing hormone (GnRH). DESIGN:Male rats were made azoospermic by active im...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)55192-9
更新日期:1992-08-01 00:00:00
abstract:OBJECTIVE:To demonstrate the efficacy and safety of follitropin alfa administered with hCG on spermatogenesis in adult male hypogonadotropic hypogonadism (HH) patients. DESIGN:Phase III, multicenter, open-label, noncomparative. SETTING:Seven US medical centers. PATIENT(S):A total of 36 adult males with severe HH. I...
journal_title:Fertility and sterility
pub_type: 杂志文章,多中心研究
doi:10.1016/j.fertnstert.2008.07.1742
更新日期:2009-09-01 00:00:00
abstract:OBJECTIVE:To review the use of radiotherapy for relieving the symptoms of recurrent endometriosis caused by functioning ovarian remnants. DESIGN:Retrospective study (case report). PATIENT(S):A woman with recurrent endometriosis of 14 years' duration. INTERVENTION(S):After hysterectomy and bilateral oophorectomy, hor...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(97)00342-7
更新日期:1997-11-01 00:00:00
abstract::There is an increasing frequency of early diagnosis of unruptured tubal ectopic pregnancy. This is due primarily to better diagnostic testing, such as the use of ultrasound and radioimmunoassay for the beta-subunit of human chorionic gonadotropin. The more stable conditions of the patients at the time of surgery cause...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)45252-0
更新日期:1981-01-01 00:00:00
abstract:OBJECTIVE:To assess the relationship between history of surgery for endometriosis and adverse obstetrical outcomes. DESIGN:Retrospective study using prospectively recorded data. SETTING:Referral center. PATIENT(S):Total of 569 women with history of surgery for endometriosis, postoperative conception, and pregnancy e...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2019.12.037
更新日期:2020-05-01 00:00:00
abstract::Although the general trend for delaying childbearing is generally viewed as causing infertility, its consequences on the interpregnancy interval have been unknown. A study of birth records for Swiss married women from 1969 to 2006 revealed that the woman's age at first birth has increased from 25.0 to 30.1 years, wher...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2009.05.078
更新日期:2009-12-01 00:00:00
abstract:OBJECTIVE:To assess in utero exposures and the odds of an endometriosis diagnosis. DESIGN:Matched cohort design. SETTING:Fourteen participating clinical centers in geographically defined areas in Utah and California. PATIENT(S):Operative cohort comprised 473 women undergoing laparoscopy/laparotomy, and an age- and r...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2012.11.013
更新日期:2013-03-01 00:00:00
abstract::We wished to verify whether semen processing by discontinuous double-layered density gradient centrifugation could improve sperm apoptotic DNA fragmentation rates using a commercially available deoxynucleotidyl transferase-mediated deoxyuridine triphosphate nick end labeling assay in 35 consecutive men presenting for ...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2007.01.059
更新日期:2008-09-01 00:00:00
abstract::The aim of this study was to investigate the effects of pure genistein therapy on asymmetric dimethylarginine in healthy postmenopausal women. Healthy postmenopausal women received pure genistein (n=21) or placebo (n=17) for 6 months, and no statistically significant effects on plasma asymmetric dimethylarginine level...
journal_title:Fertility and sterility
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.fertnstert.2009.09.057
更新日期:2010-07-01 00:00:00
abstract:OBJECTIVE:To determine the prognostic impact of the nuclear status at the two-cell stage on intracytoplasmic sperm injection (ICSI) outcomes. DESIGN:Retrospective study. SETTING:Hospital. PATIENT(S):Only ICSI cycles with time-lapse monitoring of transferred embryos with known implantation/delivery data from November...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2016.09.022
更新日期:2017-01-01 00:00:00
abstract::During an 18-month period 219 couples and 3 single women were counseled concerning private, non-agency adoption. Ninety-seven clients adopted privately a total of 105 babies. Thirty-one other couples are still actively pursuing adoption, 39 are no longer pursuing adoption, 13 became pregnant, 9 adopted through an agen...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)46164-9
更新日期:1982-04-01 00:00:00
abstract:OBJECTIVE:To evaluate the effect of endometriosis on pregnancy outcomes. DESIGN:Systematic review and meta-analysis. SETTING:Not applicable. PATIENT(S):Women with or without endometriosis. INTERVENTION(S):Electronic databases searched from their inception until February 2017 with no limit for language and with all ...
journal_title:Fertility and sterility
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.fertnstert.2017.07.019
更新日期:2017-10-01 00:00:00