2013年12月26日

Day4 胚胎可能尚無自我修復染色體之能力

Day4胚胎有高比例之染色體異常(>50%)

Day4前胚胎可能尚無自我修復染色體之能力

胚胎自我修復染色體之能力可能始自Day5囊胚期

http://humrep.oxfordjournals.org/content/28/6/1716.abstract

2013年12月25日

17%囊胚期胚胎同時兼具正常與異常染色體

PGD顯示,17%囊胚期胚胎同時兼具正常與異常染色體
這些胚胎仍可能發展成正常胚胎

囊胚期胚胎PGD並非全然準確

Of more significance may be the 17% of blastocysts that contained both diploid and aneuploid cells. The fate of these embryos is unclear. It is possible that the aneuploid cells have a growth disadvantage or are eliminated by processes such as apoptosis, leading to a decline in their numbers as development progresses, ultimately resulting in a normal fetus. If this scenario is correct, some diploid–aneuploid mosaic blastocysts may be viable and might be incorrectly discarded if aneuploid cells were detected following TE biopsy. 

http://humrep.oxfordjournals.org/content/26/2/480.full

植入胚胎有百分之30在著床後12天內流產

植入胚胎有30%順利活產

植入胚胎有30%完全未著床
植入胚胎有30%在著床後12天內流產
植入胚胎有10%在著床後12天後流產

懷孕早期流產有72%染色體異常

http://humupd.oxfordjournals.org/content/8/4/333.full.pdf+html

2013年12月18日

2013年11月19日

胚胎分裂速度太慢胚胎染色體常併異常aneuploidy

胚胎分裂速度太慢代表胚胎染色體異常aneuploidy

cell cycle time約 10–12 h 

囊胚染色體異常aneuploidy機率高達50-60%

正常分裂速度
25h+/-2h---2cell
35h+/-2h---3cell
42h+/-2h---4cell
48h+/-3h---5cell
56h+/-3h---8cell
80h+/-4h----compation
95h+/-4h----blastulation
106h+/-4h-- Full blastulation

http://www.sciencedirect.com/science/article/pii/S1472648313000709

2013年10月29日

hMG誘導排卵胚胎品質略優於rFSH

使用hMG誘導排卵胚胎品質&懷孕率略優於使用rFSH誘導排卵

http://humrep.oxfordjournals.org/content/22/9/2404.long

nfluence of ovarian stimulation with HP-hMG or recombinant FSH on embryo quality parameters in patients undergoing IVF


BACKGROUND There are limited data on the impact of different gonadotrophin preparations on embryo quality.
METHODS This evaluation was part of a randomized, assessor-blind, multinational trial, conducted in 731 women undergoing IVF after stimulation with highly purified human menopausal gonadotropin (HP-hMG; MENOPUR) (n = 363) or recombinant FSH (rFSH; GONAL-F) (n = 368). Ongoing pregnancy was the primary end-point [HP-hMG 27% and rFSH 22%; odds ratio (OR) (95% confidence interval, CI) 1.25 (0.89-1.75)]. All 7535 oocytes retrieved were evaluated daily until day 3 (embryo transfer) in a blinded manner both by local site embryologists and a central panel of three embryologists.
RESULTS The proportion of top-quality embryos per oocyte retrieved was higher with HP-hMG (11.3%) compared with rFSH (9.0%) (P = 0.044) in the local assessment, but comparable in the central assessment (9.5 and 8.0%, respectively). Significant differences in favour of HP-hMG were observed for number of blastomeres and degree of fragmentation, while uniformity of blastomere sizes, localization of fragments, frequency of multinucleation and homogeneous cytoplasm were comparable between HP-hMG and rFSH. The live birth, ongoing pregnancy and ongoing implantation rates for top-quality embryos were higher with HP-hMG than rFSH [48 versus 32% (P = 0.038), 48 versus 32% (P = 0.038), 41 versus 27% (P = 0.032)]. Both the proportion of embryos with at least 50% surviving blastomeres after cryopreservation and embryos resuming mitosis were more frequent with HP-hMG compared with rFSH.
CONCLUSIONS Composition of gonadotrophin preparations used during ovarian stimulation has an impact on some embryo quality parameters. The capacity to implant of the top-quality embryos derived from stimulation with HP-hMG appears to be improved, although the mechanism needs to be elucidated.

Figure 2:
Figure 2:
Summary of clinical outcome of the cryopreserved cycles in the HP-hMG (light bar) and rFSH (dark bar) groups
(a) ongoing implantation rate by blastomere survival rate of the transferred embryos and (b) live birth rate for the first cryo cycle, live birth rate for all cryo cycles, live birth rate by cryo cycle with embryo transfer and live birth rate by patients with thawed embryos

2013年10月10日

施打hCG當天E2太高應考慮囊胚植入以讓子宮內膜修復

施打hCG當天,
P4較低(<1.5),懷孕率較高
LH較低(<1.8),懷孕率較高
E2太高(>3900),懷孕率較低

E2太高,應考慮Day5囊胚期胚胎植入以讓子宮內膜修復

http://humrep.oxfordjournals.org/content/24/11/2902.full

2013年10月5日

曲細精管直徑與精蟲取得與否有關


曲細精管seminiferous tubules之直徑與精蟲取得與否有關
直徑<200 um可能無精蟲製造
解剖顯微鏡下找較粗(>250um) &不透明曲細精管施行TESE,較易取得精蟲

http://www.jhrsonline.org/article.asp?issn=0974-1208;year=2013;volume=6;issue=2;spage=111;epage=123;aulast=Ashraf

2013年9月28日

低劑量誘導排卵可能可提高該次IVF懷孕率


較低劑量之誘導排卵可能反而可提高該次IVF懷孕率 (1450 vs 2664iu)
原計劃施行IUI改為IVF懷孕率可能反而比一般IVF較高(45 vs 34%)

http://www.ncbi.nlm.nih.gov/pubmed/23715874


2013年9月26日

葡萄胎常由IVF過程中1個卵子與2隻精蟲同時受精造成


葡萄胎partial molar pregnancy,常由IVF過程中,1個卵子與2隻精蟲同時受精造成
使用雙倍染色體之異常精蟲施行ICSI,也可能造成partial molar pregnancy

http://www.ncbi.nlm.nih.gov/pubmed/23640373

2013年9月22日

退黑激素可提高卵子成熟之機率

低濃度(1nM)的melatonin (退黑激素)可提高不成熟卵子成熟IVM之機率
高濃度(10(6) nM)的melatonin (退黑激素)不利於不成熟卵子成熟

http://www.ncbi.nlm.nih.gov/pubmed/23737216

2013年9月20日

2013年9月7日

pill可能抑制卵巢reserve與卵泡發育


避孕藥pill會抑制卵巢反應
IVF前一週期建議不一定要使用pill
新型pill含黃體素具抑制androgen,舊型pill含黃體素具類似androgen作用
androgen對於卵泡早期發育有其必要性
新或舊型pill均可能抑制卵巢reserve與卵泡發育

http://www.rbej.com/content/11/1/28

2013年9月6日

精蟲能承受較鹼性環境,pH低於6.8精蟲無法存活

精液滲透壓(340–380 mOsm)高於血清滲透壓(280-300 mOsm)
精液pH7.2-8.0,精蟲能承受較鹼性環境,可在pH8-9間存活,但pH<6.8精蟲無法存活
精蟲細胞核包覆囊狀結構membrane bound (‘nuclear vacuoles’, more correctly ‘nuclear spaces’)---精蟲品質不佳
健康男性每日可製造數千萬~一億隻精蟲

http://humupd.oxfordjournals.org/content/19/suppl_1/i1.full

2013年9月5日

一月經週期可能有2-3個卵子挑選波follicle recruitment wave


卵子挑選: 由上週期黃體期挑選一卵子成為優勢卵子
月經第10-12天左右,卵子必須>0.9cm才有可能成為優勢卵子

黃體期仍有基礎濾泡生長,但為黃體壓制
一月經週期可能有2-3個卵子挑選波follicle recruitment wave

http://humupd.oxfordjournals.org/content/18/1/73.full


2013年9月4日

P4值過高對胚胎著床有不良影響不論卵子之數量


10000 IVF病人施打破卵針當天之P4值顯示:
P4值過高對卵子品質及受孕率無明顯不良影響,
P4值過高對胚胎著床有不良影響,不論卵子之數量&COH之反應

P4值過高 (serum P level of 1.5 ng/mL as the threshold for poor responders, 1.75 ng/mL for intermediate responders, and 2.25 ng/mL for high responders. )----子宮內膜環境可能較不適著床

http://www.ncbi.nlm.nih.gov/pubmed/22494924

2013年9月3日

使用time-lapse即時觀測囊胚ICM數量預測單絨毛膜雙羊膜同卵雙生


囊胚期植入同卵雙胞胎比例較高,
使用time-lapse即時觀測胚胎可偵測囊胚之ICM數量,
若有2 ICM之囊胚植入後可能行成囊胚monochorionic/diamniotic----最常見之單絨毛膜雙羊膜之同卵雙生

http://humrep.oxfordjournals.org/content/22/suppl_1/i9.full.pdf+html?ijkey=585c21253b2644a26b17a7d5cd20dfe24c87f97f&keytype2=tf_ipsecsha

2013年9月2日

子宮內膜厚度之測量


子宮內膜厚度之測量,
外層密度較高more echogenic
內層密度較低more hypoechoic, homogenously echogenic
中央為前後子宮內膜interface

http://radiographics.rsna.org/content/32/6/1575.full


2013年9月1日

黃體化牽涉複雜的賀爾蒙, 分子訊號及血管形成交互作用


黃體Corpus luteum主要由granulosa cell & thecal cell組成
黃體化luteinization 牽涉複雜的賀爾蒙,分子訊號及血管形成angiogenesis交互作用interaction

http://www.biolreprod.org/content/63/1/2.full

2013年8月30日

AIH精液取出後30分內進行精蟲處理

人工授孕AIH,取精液最好在診所取,取出後最好30分內進行精蟲處理sperm washing
人工授孕誘導排卵最好使用hMG(取代排卵藥)
取精液後最好90分左右施行AIH

http://www.ncbi.nlm.nih.gov/pubmed/15589871

2013年8月29日

2013年8月28日

GnRH antagonist抑制子宮內膜雌激素與黃體素接受體

GnRH antagonist可能會抑制子宮內膜之雌激素與黃體素接受體 (estrogen receptor & progesterone receptor之mRNA expression)

著床窗口 implantation 約為LH上升後第5-10天
window of implantation is described as from Day 5 to Day 10 after the LH surge (Sharkey and Smith, 2003).

http://humrep.oxfordjournals.org/content/22/11/2981.full

2013年8月26日

AIDS男性可預防性化療chemoprophylaxis再施行AIH

HIV男性施行人工授精最有效之預防方法為清洗精蟲sperm washing(grading, swim-up, wash)
另一方法為預防性化學藥劑治療pre-exposure chemoprophylaxis (PrEP)降低HIV titler

http://humupd.oxfordjournals.org/content/19/2/136.abstract

2013年8月24日

HIV病患AIH採用多次離心法

HIV男性採用多次離心法(45–90% colloidal silica density gradient)+swim-up 清洗精蟲
分離HIV-free sperm from the infected NSC
降低精蟲感染HIV機率
統計顯示感染HIV機率低

http://humrep.oxfordjournals.org/content/25/8/1869.full


2013年8月21日

服用葉酸可能不利於卵泡生成

本篇提出另類觀點,服用葉酸可能不利於卵泡生成???
服用葉酸病患卵子數量反而少於不服用葉酸病患卵子數量
葉酸可能影響FSH receptor (FSHR) mRNA表現

傳統 vs. 服用葉酸
preovulatory follicles  (10.6 vs. 7.4; P < 0.01)
median number of retrieved oocytes (12.3 vs. 6.7; P = 0.001)
E2 (傳統>服用葉酸)

http://jcem.endojournals.org/content/96/2/E322.full

2013年8月15日

低劑量誘導排卵IVF取消機率高達百分之20


<38歲試管嬰兒病人,使用低劑量誘導排卵(FSH 150iu/day,自月經第5天誘導排卵COH )

取消機率高達20%(卵泡>12mm少於3顆)
懷孕率20.7%

http://humrep.oxfordjournals.org/content/22/7/1919.full


2013年8月14日

根據體重與基礎濾泡數量決定誘導排卵之劑量

人工授孕AIH, 根據體重與基礎濾泡數量決定誘導排卵之劑量
體重越重, 基礎濾泡數量越少劑量越高

http://humrep.oxfordjournals.org/content/24/10/2523.full


Figure 1
Dosage nomogram for ovulatory IUI patients' first rFSH treatment cycle.
The aim of the stimulation was to achieve two follicles ≥18 mm and maximum one intermediate-size follicle (≥14 and <18 mm) on the day of hCG. The day of hCG was defined as the day the leading follicle reached a diameter of 18 mm. On the basis of a patient's body weight (kg) and total AFC, an individual starting dose can be identified. Reprinted from an article in Reproductive BioMedicine Online by Freiesleben et al. (2008), with permission from Reproductive Healthcare Ltd.

2013年8月12日

pill下降體內男性賀爾蒙濃度


pill可下降體內男性賀爾蒙濃度,機轉包括:
下降卵巢製造男性賀爾蒙
下降腎上腺製造男性賀爾蒙&
提高sex hormone-binding globulin (SHBG)濃度

pill可提高sex hormone-binding globulin (SHBG)濃度
不同種類pill下降體內男性賀爾蒙濃度類似

http://humupd.oxfordjournals.org/content/20/1/76.full


2013年8月11日

2013年8月9日

2013年8月6日

2013年7月31日

原核Z-score對預估胚胎懷孕率成效有限

原核PN評估Z-score, 對於胚胎植入後之懷孕率預估成效有限

2PN原核荷仁最好>7
Z1----Fig A----最佳
Z2----Fig B----優
Z3----Fig C,D--中
Z4----Fig E,F--差

http://www.ovarianresearch.com/content/6/1/64


Zygote scoring system of Scott et al. [10]. Z1 includes zygotes with equal number of nucleoli aligned at PN junction (A), Z2 includes zygotes with equal number and size of nucleoli (between 3 and 7) which are equally scattered in the two PN (B), Z3 includes zygotes with either very small/large nucleoli (C and D), and Z4 includes zygotes showing PN separated or different in size and small nucleoli, partially aligned or scattered (E and F).
Nicoli et al. Journal of Ovarian Research 2013 6:64   doi:10.1186/1757-2215-6-64
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Pronuclear morphology evaluation for fresh in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) cycles: a systematic review

Alessia NicoliStefano Palomba*Francesco CapodannoMaria FiniAngela Falbo andGiovanni Battista La Sala

Department of Obstetrics, Gynecology and Pediatrics, A.O. Arcispedale S. Maria Nuova, IRCCS, University of Modena and Reggio Emilia, Viale Risorgimento 80, 42123 Reggio Emilia, Italy
For all author emails, please log on.

Journal of Ovarian Research 2013, 6:64  doi:10.1186/1757-2215-6-64

The electronic version of this article is the complete one and can be found online at:http://www.ovarianresearch.com/content/6/1/64

Received:5 June 2013
Accepted:16 August 2013
Published:12 September 2013
© 2013 Nicoli et al.; licensee BioMed Central Ltd. 
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The current systematic review was aimed to assess the effectiveness of the zygote morphology evaluation in fresh in vitro fertilization (IVF) and intracytoplasmic sperm injection (ICSI) cycles. All available studies reporting on zygote morphology and clinical and/or biological outcomes were analyzed. Forty studies were included in the final analysis. Fourteen different zygote scoring systems were employed. Zygote morphology correlated significantly with embryo quality and cleavage, blastocyst stage, embryonic chromosome status, in a high proportion of the studies which assessed the specific outcome [15/25 (60%), 15/20 (75%), 7/8 (87.5%), 6/6 (100%), respectively]. On the other hand, only a reduced proportion of papers showed a statistically significant relationship between implantation, pregnancy and delivery/live-birth rates and zygote morphology score [12/23 (52.2%), 12/25 (48%), 1/4 (25%), respectively]. In conclusion, our findings demonstrate the lack of conclusive data on the clinical efficacy of the zygote morphology evaluation in fresh IVF/ICSI cycles, even if biological results showing a good relationship with embryo viability suggest a role in cycles in which the transfer/freezing is performed at day 1.
Keywords: 
ARTs; Embryo; ICSI; IVF; Morphology; Zygote

2013年7月30日

新鮮捐贈卵子與冷凍捐贈卵子懷孕率無差異

新鮮捐贈卵子與冷凍捐贈卵子受孕植入懷孕率無明顯差異‧

http://www.ncbi.nlm.nih.gov/pubmed/17889865?dopt=Abstract

取卵數多不明顯下降該週期懷孕率

取卵數少vs.取卵數多
取卵數較多(n>18)並不會明顯下降該週期之懷孕率‧
取卵數多累積懷孕率較高 (32 vs 58%)‧
長效排卵針corifollitropin alfa效果與短效排卵針daily rFSH懷孕率類似(32 vs 31%)

http://humrep.oxfordjournals.org/content/28/2/442.abstract


2013年7月23日

打破卵針當天P4/E2>1懷孕率較低

打破卵針當天P4/E2 比例[P (ng/mL) 1,000/E2 (pg/mL).]-------可預測IVF懷孕率

P4/E2>1代表過早黃體化,通常懷孕率較低


http://www.ncbi.nlm.nih.gov/pubmed/18603501


2013年7月20日

cAMP細胞內訊號傳遞與卵細胞發育有關

卵泡發育過程中,卵細胞會分泌inhibin, E2,抑制腦下垂體分泌FSH, LH

FSH會刺激卵細胞之adenylyl cyclase, 引發cAMP製造及細胞內訊號傳遞,及進一步卵顆粒細胞及卵細胞之發育
adenylyl cyclase and the production of cAMP
http://www.biolreprod.org/content/65/3/655.full

2013年7月19日

PCO病人P4大於1.2與IVF結果可能無明顯相關

過早黃體化----P4>1 or 2, 機率約23%,

PCO病人於施打HCG當天測P4>1.2 or P4<1.2,
卵泡越多,P4可能較高,
P4>1.2與IVF結果無明顯相關

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3401251/



2013年7月18日

過早黃體化(premature luteinization)


過早黃體化(premature luteinization)---打破卵針當天P4>1.5 ng/ml(1-2 ng/ml),

可考慮胚胎冷凍保存,或保守植入(少量優質胚胎植入)

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2854984/

2013年7月17日

2013年7月12日

卵巢過度刺激之病患可使用腦下垂體抑制劑控制嚴重度

卵巢過度刺激OHSS之病患可使用腦下垂體抑制劑GnRHantagonist控制其嚴重度

研究顯示胚胎植入ET後使用腦下垂體抑制劑,仍可維持不錯懷孕率,
並下降卵巢過度刺激嚴重度

http://humrep.oxfordjournals.org/content/28/7/1929.abstract


2013年7月9日

因卵巢過度刺激下降破卵針劑量可能干擾懷孕結果


因卵巢過度刺激(OHSS)而下降破卵針劑量(6000-->4000iu),可能干擾懷孕結果
卵子受孕率FR: 80 vs 71%
臨床懷孕率PR: 65 vs 35%

http://www.ncbi.nlm.nih.gov/pubmed/21824709

2013年7月6日

母血胎兒DNA唐氏症篩檢仍無法完全準確取代羊水檢驗


母血胎兒DNA唐氏症篩檢仍無法完全準確取代羊水檢驗

但可望取代傳統母血唐氏症篩檢

Noninvasive detection of fetal trisomy 21: systematic review and report of quality and outcomes of diagnostic accuracy studies performed between 1997 and 2012

  1. S.G.M. Frints1,2,*
+Author Affiliations
  1. 1Department of Clinical Genetics, Reproductive Genetics, Maastricht University Medical Center+PO Box 5800, 6202 AZ Maastricht, The Netherlands
  2. 2GROW School for Oncology and Developmental Biology, Maastricht University Medical Center+PO Box 616, 6200 MD Maastricht, The Netherlands
  3. 3Department of Epidemiology, Faculty of Health Medicine and Life Sciences, Maastricht University, PO Box 616, 6200 MD Maastricht, The Netherlands
  4. 4Department of Obstetrics & Gynaecology, Prenatal Diagnosis, Screening and Therapy, Maastricht University Medical Center+PO Box 5800, 6202 AZ Maastricht, The Netherlands
  5. 5South-East Netherlands NIPT Consortium, Maastricht University Medical Center+, PO Box 5800, 6202 AZ Maastricht, The Netherlands
  1. *Correspondence address. Tel: +31-4-33-87-78-55; Fax: +31-4-33-87-58-00; E-mail: s.frints@mumc.nl
  • Received October 26, 2012.
  • Revision received December 20, 2012.
  • Accepted January 3, 2013.

Abstract

BACKGROUND Research on noninvasive prenatal testing (NIPT) of fetal trisomy 21 is developing fast. Commercial tests have become available. To provide an up-to-date overview of NIPT of trisomy 21, an evaluation of the methodological quality and outcomes of diagnostic accuracy studies was made.
METHODS We undertook a systematic review of the literature published between 1997 and 2012 after searching PubMed, using MeSH terms ‘RNA’, ‘DNA’ and ‘Down Syndrome’ in combination with ‘cell-free fetal (cff) RNA’, ‘cffDNA’, ‘trisomy 21’ and ‘noninvasive prenatal diagnosis’ and searching reference lists of reported literature. From 79 abstracts, 16 studies were included as they evaluated the diagnostic accuracy of a molecular technique for NIPT of trisomy 21, and the test sensitivity and specificity were reported. Meta-analysis could not be performed due to the use of six different molecular techniques and different cutoff points. Diagnostic parameters were derived or calculated, and possible bias and applicability were evaluated utilizing the revised tool for Quality Assessment of Diagnostic Accuracy (QUADAS-2).
RESULTS Seven of the included studies were recently published in large cohort studies that examined massively parallel sequencing (MPS), with or without pre-selection of chromosomes, and reported sensitivities between 98.58% [95% confidence interval (CI) 95.9–99.5%] and 100% (95% CI 96–100%) and specificities between 97.95% (95% CI 94.1–99.3%) and 100% (95% CI 99.1–100%). None of these seven large studies had an overall low risk of bias and low concerns regarding applicability. MPS with or without pre-selection of chromosomes exhibits an excellent negative predictive value (100%) in conditions with disease odds from 1:1500 to 1:200. However, positive predictive values were lower, even in high-risk pregnancies (19.7–100%). The other nine cohort studies were too small to give precise estimates (number of trisomy 21 cases: ≤25) and were not included in the discussion.
CONCLUSIONS NIPT of trisomy 21 by MPS with or without pre-selection of chromosomes is promising and likely to replace the prenatal serum screening test that is currently combined with nuchal translucency measurement in the first trimester of pregnancy. Before NIPT can be introduced as a screening test in a social insurance health-care system, more evidence is needed from large prospective diagnostic accuracy studies in first trimester pregnancies. Moreover, we believe further assessment, of whether NIPT can be provided in a cost-effective, timely and equitable manner for every pregnant woman, is required.

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