Abstract:
OBJECTIVE:To develop an experimental model for embryos with a defect specific to hatching, with the purpose of clarifying the mammalian embryo hatching mechanism. DESIGN:A microneedle was inserted under the zona pellucida (ZP) of mouse embryos, and either 1/2 or 1/4 of the blastomeres were mechanically destroyed. The remainder of embryos that developed into blastocysts were compared for hatching to controls wherein a microneedle was inserted and withdrawn without harming the embryo. Experiments were done to increase pressure within the perivitelline space to decrease the amount of ZP material to study the hatching mechanism. SETTING:University-based basic research laboratory. RESULTS:When 1/2 or 1/4 of the embryo was destroyed and the remaining cells developed into healthy blastocysts within the intact zona, hatching was significantly impaired, and zona thickness was markedly increased relative to controls. When a mineral oil droplet was inserted under the zona to enhance a possible mechanical component of hatching, manipulated embryos were not restored to normal hatching, and hatching of unmanipulated blastocysts was not improved. However, when the zona was circumferentially thinned by application of acid Tyrode's solution, the hatching defect in manipulated "3/4 embryos" was corrected. CONCLUSION:Because it is known that embryos with cells reduced by 1/2 or 1/4 have normal developmental potential, we conclude that the inability of such embryos to hatch from an intact zona constitutes a mouse model for a defect specific to hatching. Moreover, results from mineral oil droplet insertion and circumferential thinning of the zona indicate that normal hatching is accomplished predominantly, if not entirely, by zona lysis, not by pressure exerted against the zona by the expanding blastocyst.
journal_name
Fertil Steriljournal_title
Fertility and sterilityauthors
Gordon JW,Dapunt Udoi
10.1016/s0015-0282(16)55993-7subject
Has Abstractpub_date
1993-06-01 00:00:00pages
1296-301issue
6eissn
0015-0282issn
1556-5653pii
S0015-0282(16)55993-7journal_volume
59pub_type
杂志文章abstract::Using a primate model, we have tested a novel regimen of gonadotropin-releasing hormone (GnRH) antagonist plus pulsatile GnRH for the achievement of controlled restoration of gonadotropin secretion and ovulation induction. As a prelude, ovariectomized cynomolgus monkeys (n = 3) were treated with Antide ([N-Ac-D-Nal(2)...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:
更新日期:1990-12-01 00:00:00
abstract::On the basis of studies in monkeys, the hypothesis has been proposed that vasectomy induces the formation of circulating immune complexes (CICs), which--via activation of the complement system--may result in immune injury of the endothelium and thereby exacerbate atherosclerosis; the same mechanism has been suggested ...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:
更新日期:1982-06-01 00:00:00
abstract:OBJECTIVE:To evaluate the heparin-glutathione test (HEGLUT) for the selection of viable sperm for intracytoplasmic sperm injection (ICSI). DESIGN:A prospective study. SETTING:Department of Pediatrics, Obstetrics and Gynecology, University of Valencia and Instituto Valenciano de Infertilidad. PATIENT(S):Semen samples...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(98)00334-3
更新日期:1998-12-01 00:00:00
abstract:OBJECTIVE:To investigate changes in plasma lipoprotein profile, hemostatic factors, platelet aggregation, endothelin-1, and cardiac function during postmenopausal sequential 6-month hormone replacement therapy (HRT). DESIGN:Open longitudinal prospective study. SETTING:Gynecologic department of a medical center. PATI...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(97)00487-1
更新日期:1998-02-01 00:00:00
abstract:OBJECTIVE:To develop a technique for contrast infusion sonography and assess the possible use in determining microinsert placement and tubal status after Essure sterilization. DESIGN:Techniques and instrumentation. SETTING:Healthy women in an academic multispecialty group. PATIENT(S):Ten women desiring permanent ste...
journal_title:Fertility and sterility
pub_type: 临床试验,杂志文章
doi:10.1016/j.fertnstert.2005.10.075
更新日期:2006-06-01 00:00:00
abstract::Diagnostic laparoscopy is commonly performed on patients as part of a complete infertility investigation. Recently published protocols have investigated the efficacy of using empiric ovulation induction, intrauterine insemination, or both before beginning in vitro fertilization. Because many patients enrolled in these...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)60374-6
更新日期:1988-12-01 00:00:00
abstract:OBJECTIVE:To evaluate the efficiency of oocyte donation cycles using egg "cryo-banking." DESIGN:Study conditions for vitrified/warmed oocytes for 20 non-autologous recipients (from 10 donors) were set prospectively, and outcomes of it were later compared retrospectively to nine fresh donations cycles. SETTING:Private...
journal_title:Fertility and sterility
pub_type: 临床试验,杂志文章
doi:10.1016/j.fertnstert.2008.06.005
更新日期:2009-08-01 00:00:00
abstract:OBJECTIVE:To determine the prevalence of idiopathic hirsutism among a population of consecutive hirsute patients. DESIGN:Prospective cohort study. SETTING:University-based clinic. PATIENT(S):Premenopausal women with a complaint of hirsutism who were not receiving hormonal therapy. INTERVENTION(S):Evaluations for to...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(98)00141-1
更新日期:1998-08-01 00:00:00
abstract:OBJECTIVE:To report a novel technique for cervical reconstruction in a patient with congenital agenesis of the cervix. DESIGN:Case report. SETTING:University-based tertiary care hospital. PATIENT(S):A woman with congenital absence of the cervix, functional vagina, and adenomyosis uteri. INTERVENTION(S):Laparoscopic...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2011.02.007
更新日期:2011-06-01 00:00:00
abstract::This study investigated the prevalence of Tyr204Phe and Val34Leu polymorphisms in two Brazilian ethnic groups (171 Caucasians and 27 Blacks, and 117 men and 81 women) and in patients with recurrent miscarriages (RM) (86 women: 53 Caucasians and 33 Blacks). Study groups were matched to control groups by race and age. T...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2004.04.052
更新日期:2004-11-01 00:00:00
abstract:OBJECTIVE:To evaluate the effects of conjugated equine estrogens, medroxyprogesterone acetate (MPA), conjugated equine estrogens combined with MPA, tamoxifen, and soybean estrogens on vaginal cytology in surgically postmenopausal cynomolgus macaques (Macaca fascicularis). DESIGN:Randomized long-term experimental trial...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:
更新日期:1996-05-01 00:00:00
abstract:OBJECTIVE:To study the efficacy of performing two inseminations per cycle in IUI with husband's sperm compared with one insemination per cycle. DESIGN:Meta-analysis. SETTING:Randomized and prospective trials comparing two inseminations vs. one insemination per cycle in IUI with husband's sperm, retrieved by MEDLINE a...
journal_title:Fertility and sterility
pub_type: 评论,杂志文章,meta分析,评审
doi:10.1016/j.fertnstert.2003.12.035
更新日期:2004-07-01 00:00:00
abstract::"To understand the actual world as it is, not as we should wish it to be, is the beginning of wisdom." - Bertrand Russell. ...
journal_title:Fertility and sterility
pub_type: 社论
doi:10.1016/j.fertnstert.2018.06.007
更新日期:2018-09-01 00:00:00
abstract:OBJECTIVE:To compare pregnancy rates after fallopian tubal and uterine transfer of cryopreserved embryos. DESIGN:Prospective randomized trial with assignment to treatment groups by a random number table. SETTING:University of Iowa Hospitals and Clinics, a tertiary care academic institution. PATIENTS:Forty patients w...
journal_title:Fertility and sterility
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/s0015-0282(16)57429-9
更新日期:1995-03-01 00:00:00
abstract:OBJECTIVE:To investigate the safety and feasibility of performing two consecutive ovarian stimulation cycles with the use of letrozole protocol for fertility preservation in breast cancer patients. DESIGN:Retrospective cohort study. SETTING:Academic fertility preservation center. PATIENT(S):Seventy-eight women ≤ 45 ...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2013.08.030
更新日期:2013-12-01 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 investigate the effects of thawing temperature on sperm function after cryopreservation. The technical aspects of sperm cryopreservation have significantly improved over the last few decades. However, a standard protocol designed to optimize sperm motility recovery after thawing has not yet been establishe...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2008.10.021
更新日期:2010-02-01 00:00:00
abstract:OBJECTIVE:To quantify the in vitro effects of gonadotropins on benign, borderline, and malignant ovarian cell lines. DESIGN:In vitro cell culture. SETTING:Research laboratory. PATIENT(S):None. INTERVENTION(S):Three hormonally sensitive ovarian neoplastic cell lines were exposed to control medium, FSH (40 mIU/mL), h...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(02)03367-8
更新日期:2002-11-01 00:00:00
abstract:OBJECTIVE:To study and compare the secretion of pregnancy specific beta 1-glycoprotein (SP1) and human chorionic gonadotropin (hCG) by human pre-embryos, cultured in vitro, with their respective morphological development. DESIGN:Spare human pre-embryos from randomly selected women participating in a program of in vitr...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)54912-7
更新日期:1992-03-01 00:00:00
abstract::One hundred and twenty-one freshly-collected human oocytes and 839 unfertilized human oocytes after insemination were cryopreserved by vitrification. The cryoprotectants used were dimethylsulfoxide (DMSO) and sucrose. Vital staining and morphological criteria were used to assess injuries to cells. Variation of the tim...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(16)61032-4
更新日期:1989-11-01 00:00:00
abstract:OBJECTIVE:To determine efficacy and safety of asoprisnil in patients with leiomyomata. DESIGN:Phase 2, multicenter, prospective, randomized, double-blind, placebo-controlled, parallel-group study. SETTING:Twenty-eight sites in the United States and 1 in Canada. PATIENT(S):One hundred twenty-nine women with leiomyoma...
journal_title:Fertility and sterility
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.fertnstert.2006.11.094
更新日期:2007-06-01 00:00:00
abstract::This document provides a general overview for physicians of the qualities and conditions necessary for good management practices within the endocrinology, andrology, and embryology laboratories in the United States. It is intended as an addendum to previously published guidelines that further detail these responsibili...
journal_title:Fertility and sterility
pub_type: 杂志文章,实务指引,评审
doi:10.1016/j.fertnstert.2014.06.036
更新日期:2014-10-01 00:00:00
abstract::The steroidogenic activity of cumulus oophorus granulosa cells obtained from unstimulated rabbits in estrus has been investigated at closely timed intervals in short-term cultures. The presence of viable, structurally well preserved oocytes and the addition of large follicle follicular fluid had no apparent inhibitory...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:
更新日期:1975-05-01 00:00:00
abstract::A recent survey of American Society for Reproductive Medicine (ASRM) members indicates that they express a commitment to professional standards and a desire for advocacy. Their attitudes echo traditional values of professionalism, upon which ASRM should capitalize. ...
journal_title:Fertility and sterility
pub_type: 评论,杂志文章
doi:10.1016/j.fertnstert.2004.01.052
更新日期:2004-09-01 00:00:00
abstract:OBJECTIVE:To report a rare case of true hermaphroditism presenting in adolescence as bilateral gynecomastia in a phenotypic male. DESIGN:Case report. SETTING:Academic medical center. PATIENT(S):A 19-year-old phenotypic male who presented with pronounced bilateral gynecomastia and was ultimately diagnosed with true h...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2004.09.036
更新日期:2005-04-01 00:00:00
abstract:OBJECTIVE:To determine the probability of detecting the gestational sac of a normal intrauterine pregnancy by vaginal ultrasound at different gestational ages and serum hCG concentrations. DESIGN:Prospective, randomized study. SETTING:Pregnant human volunteers in a university-based clinical research environment. PAT...
journal_title:Fertility and sterility
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/s0015-0282(16)56749-1
更新日期:1994-06-01 00:00:00
abstract:OBJECTIVE:To update results on outcomes with frozen/thawed oocytes using a differential sucrose concentration during dehydration (0.2 M) and rehydration (0.3 M), combined with a one-step propanediol exposure. DESIGN:Retrospective cohort study. SETTING:Private IVF centers. PATIENT(S):Infertile couples undergoing IVF ...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/j.fertnstert.2012.01.127
更新日期:2012-05-01 00:00:00
abstract:OBJECTIVE:To compare the efficacy and side effects of vaginal misoprostol with dinoprostone for cervical priming before operative hysteroscopy and to assess the cervicouterine complications related to cervical dilatation and hysteroscopic surgery. DESIGN:A prospective randomized study. SETTING:Tertiary university hos...
journal_title:Fertility and sterility
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.fertnstert.2006.03.039
更新日期:2006-10-01 00:00:00
abstract:OBJECTIVE:To examine the literature systematically in order to identify prospective comparative trials answering the following question: Is vitrification of human embryos associated with a higher postthawing survival rate as compared with slow freezing? DESIGN:Systematic review and meta-analysis. SETTING:University-b...
journal_title:Fertility and sterility
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.fertnstert.2007.06.010
更新日期:2008-07-01 00:00:00
abstract:OBJECTIVE:To determine whether estrogen down-regulates MCP-1 in vascular endothelial cells. DESIGN:A prospective comparative study. SETTING:Academic research environment. PATIENT(S):Human umbilical vein endothelial cells (n = 3) and human coronary artery endothelial cells (n = 3) obtained from females. INTERVENTION...
journal_title:Fertility and sterility
pub_type: 杂志文章
doi:10.1016/s0015-0282(01)03223-x
更新日期:2002-03-01 00:00:00