Abstract:
AIMS:The objective of this study was to determine whether the maternal surface of the placenta is fractal, and whether the mean fractal dimension differs according to the gestational age and clinically or pathologically different conditions. METHODS:Using digitized images of the maternal surface of 75 placentas, fractal dimensions were measured with a fractal analysis software. RESULTS:The mean fractal dimension of the maternal surface of the placentas significantly exceeded the topological dimension of a surface (= 2). This means that the morphological pattern of the maternal surface fulfills the mathematical definition of fractal structures. Among the three different groups of gestational age, the mean fractal dimension in 22-29 weeks was significantly lower than that in 30-36 and 37-41 weeks (p = 0.022 and 0.014, respectively). Although not significantly different (p = 0.149), in 30-36 weeks the mean fractal dimension of the placentas complicated by pregnancy-induced hypertension (PIH) was greater than that without PIH. CONCLUSION:Fractal geometry, a vocabulary of irregular shapes, can be useful for describing quantitatively the architecture of the maternal surface of the placenta and become a useful tool for analyzing physiological and pathological placental formation mathematically.
journal_name
Gynecol Obstet Investjournal_title
Gynecologic and obstetric investigationauthors
Shiba M,Kikuchi A,Hara K,Sunagawa S,Yoshida S,Takagi K,Ogiso Ydoi
10.1159/000098198subject
Has Abstractpub_date
2007-01-01 00:00:00pages
229-33issue
4eissn
0378-7346issn
1423-002Xpii
000098198journal_volume
63pub_type
杂志文章abstract:OBJECTIVE:To evaluate the effectiveness of five methods including the ThinPrep cytological test (TCT), liquid-based cytology, the human papillomavirus (HPV) test, detection of the TERC and C-MYC genes and visual inspection with acetic acid/Lugol's iodine (VIA/VILI) for opportunistic cervical cancer screening, and to ex...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000371760
更新日期:2015-01-01 00:00:00
abstract::Women with Kartagener's syndrome (KS) are at a risk for infertility because of the dyskinetic ciliary activity in the fallopian tubes. In vitro fertilization - embryo transfer (IVF-ET) is considered the treatment of choice for patients with tubal factor infertility. In the literature only 2 patients with KS were treat...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000106503
更新日期:2008-01-01 00:00:00
abstract::Highly evacuated (980 mbar) wound drainage systems according to Redon were used in 100 gynecologic laparotomies. In 96% of cases, no flask exchange was required before the system was removed. Bacteriological specimens from various locations of the Redon system showed minimal colonization with pathogenic bacteria. No c...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000293758
更新日期:1988-01-01 00:00:00
abstract::The Special Programme of Research in Human Reproduction (HRP), co-sponsored by the UNDP, UNFPA, WHO, and the World Bank, is celebrating 40 years of activities with an expansion of its mandate and new co-sponsors. When it began, in 1972, the main focus was on evaluating the acceptability, effectiveness, and safety of e...
journal_title:Gynecologic and obstetric investigation
pub_type: 历史文章,杂志文章,评审
doi:10.1159/000343067
更新日期:2012-01-01 00:00:00
abstract:AIMS:The study aimed to compare the clinical course and disease severity between culture positive and culture negative patients with intra-uterine devices (IUD)-associated pelvic inflammatory disease (PID). METHODS:A retrospective study of all IUD-associated PID patients admitted to tertiary medical center between 201...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000490666
更新日期:2019-01-01 00:00:00
abstract:BACKGROUND/AIMS:It has been reported that lower urinary tract symptoms (LUTS) are more prevalent in patients who have undergone hysterectomy. However, the effects of surgical approach of hysterectomy on micturition have not been well documented. The aim of this study is to compare LUTS between patients who underwent va...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章,多中心研究
doi:10.1159/000297507
更新日期:2010-01-01 00:00:00
abstract::The identification of immunoreactive beta-endorphin, beta-lipotropin and ACTH from extracts of human placentas by radioimmunoassay suggests a probable synthesis of these peptides in the placenta. In this study we investigated the presence of beta-endorphin and ACTH in placenta, amniotic membranes and umbilical cord us...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000299023
更新日期:1985-01-01 00:00:00
abstract:OBJECTIVE:The aim of the present study was to evaluate the dynamic changes in serially obtained amniotic fluid index values and to determine any association with intrapartum fetal distress in a term population. MATERIALS AND METHODS:All patients, > or = 40 weeks of gestational age, evaluated at the Institute of Obstet...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000291535
更新日期:1997-01-01 00:00:00
abstract::The objective of the present study was to compare the rate of embryo cleavage after oocyte insemination with capacitated spermatozoa in the presence or absence of follicular fluid. In the first experiment, a total of 67 oocytes were inseminated with spermatozoa which had been submitted to part of the capacitation proc...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000292545
更新日期:1994-01-01 00:00:00
abstract:OBJECTIVES:To investigate the signs, symptoms and changes in the vaginal milieu that could be associated with cervical human papillomavirus infection (CHPI). STUDY DESIGN:Women (n = 972) attending for contraceptive advice were tested for human papillomavirus in cervical samples. Results of gynecological history, exami...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000291818
更新日期:1997-01-01 00:00:00
abstract:AIM:To investigate the ability of lactobacilli to persist in the genital area (vagina and labia) of women after the topical application of an ointment containing Lactobacillus gasseri LN40, L. fermentum LN99 and L. rhamnosus LN113. Secondary objectives were to study the presence of Escherichia coli and other contaminan...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章,评审
doi:10.1159/000446946
更新日期:2017-01-01 00:00:00
abstract::The effect of the moon on the number of newborns has been investigated extensively with contradictory results but with few significant findings. In this paper, a possible lunar effect is analyzed by a nonlinear Poisson regression model similar to a Fourier analysis based on all children (n = 2,760,362) born in Austria...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000052999
更新日期:2002-01-01 00:00:00
abstract::Mesh of absorbable polyglactin 910 instead of human tissues or nonabsorbable synthetic materials was utilized for retropubic sling procedures in 21 women with urinary stress incontinence. The patients have been observed for a period ranging from 4 to 14 months. 20 of them are continent while there was 1 relapse after ...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000299212
更新日期:1983-01-01 00:00:00
abstract::In order to investigate the effect of hormone replacement therapy (HRT) on plasma homocysteine and C-reactive protein (CRP) levels 46 healthy postmenopausal women were prospectively enrolled. HRT, which was either 0.625 mg/day conjugated equine estrogen (CEE) plus 2.5 mg/day medroxyprogesterone acetate (MPA) or 0.625 ...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000049412
更新日期:2002-01-01 00:00:00
abstract::We report a postmenopausal patient with serous papillary cystadenocarcinoma of the ovary associated with large abscess formation and estrogen production. Ovarian cancer accompanied by stromal function is an occasional event, but large abscess association is a rarity. The present case is thus even rarer. Her clinical c...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000292710
更新日期:1993-01-01 00:00:00
abstract::A case control study was performed to examine possible morbidity associated with Chlamydia trachomatis in 15 pregnant women with idiopathic preterm premature rupture of the membranes (PROM; group A), and in two control groups, 35 healthy preterm pregnant women (group B), and 43 healthy pregnant women at term (group C)...
journal_title:Gynecologic and obstetric investigation
pub_type: 临床试验,杂志文章
doi:10.1159/000293249
更新日期:1990-01-01 00:00:00
abstract::The patterns of plasma melatonin, gonadotropins, sex steroids and prolactin were studied in anovulatory infertile females undergoing ovulation induction with hMG/hCG. Melatonin levels were found to fluctuate during the menstrual cycle of these subjects with a nadir at mid-cycle and peak occurring at the early follicul...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000009977
更新日期:1998-01-01 00:00:00
abstract::The efficacy of three protocols of endometrial preparation (spontaneous cycles, A: artificial preparation, B; ovarian stimulation, C) for cryopreserved-thawed human embryo transfer (CT-ET). The implantation and clinical pregnancy rates per cycle in 236 women undergoing 381 consecutive CT-ETs were evaluated according t...
journal_title:Gynecologic and obstetric investigation
pub_type: 临床试验,杂志文章
doi:10.1159/000292274
更新日期:1996-01-01 00:00:00
abstract:OBJECTIVE:To evaluate whether prolactin, alpha-fetoprotein (AFP) or B-human chorionic gonadotropin (BHCG) is the most effective marker in vaginal fluid for diagnosing prelabor rupture of membranes (PROM). These proteins are present in amniotic and vaginal fluid and have been reported to be potent markers of PROM, but h...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000097844
更新日期:2007-01-01 00:00:00
abstract::Uterine myoma leading to uremia in young women below 16 years of age is an extremely rare condition. On reviewing the literature we have not been able to find any case similar to the one described below. ...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000293043
更新日期:1991-01-01 00:00:00
abstract::Fetal renal anatomy was assessed in 660 apparently normal fetuses. The problems of technique of visualization of the kidneys are outlined. A correlation of fetal kidney length and gestational age is presented. The results are presented to be used as an adjunct in establishing fetal gestational age, as well as the asse...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000298825
更新日期:1987-01-01 00:00:00
abstract::The concentration of P29, a phosphoprotein related to estradiol receptor (RE), was measured by an immunoradiometric assay in human breast cancer cytosol and the results compared with the levels of RE and progesterone receptors (RP), as measured by the classical ligand-binding assay. Good linear correlation was found b...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000293689
更新日期:1988-01-01 00:00:00
abstract:BACKGROUND/AIMS:To evaluate maternal serum transformed alpha-fetoprotein (MSt-AFP) levels, a new molecular conformation of AFP was used in cases of threatened preterm labor (TPL). METHODS:Prospective case-control study. Maternal serum levels of classical AFP and transformed AFP (t-AFP) were compared between 2 groups m...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000233239
更新日期:2009-01-01 00:00:00
abstract::Two women, one 27 years old (case 1) and the other 20 years old (case 2), were evaluated due to right lower quadrant pain. The lactate dehydrogenase level was increased in case 1 and the dihydroepiandostrone level was increased in both cases. Preoperative transvaginal ultrasonography revealed solid masses, but the tum...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000053009
更新日期:2002-01-01 00:00:00
abstract::To test the effects of calcium dobesilate (Doxium) in pregnancies complicated with pregnancy-induced hypertension or mild/moderate pre-eclampsia a double-blind, placebo-controlled pilot study was carried out. Primigravida patients (gestational age =34 weeks) daily took 2 g Doxium or placebo until delivery. Twelve pa...
journal_title:Gynecologic and obstetric investigation
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1159/000010080
更新日期:1999-01-01 00:00:00
abstract::A total of 171 consecutive high-risk parturients in Maputo Central Hospital were studied regarding post-partum contraceptive choice in order to plan a new post-natal clinic approach in maternal health care. It was found that contraceptive interest was much less in women with experience of child loss than in women with...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000294887
更新日期:1992-01-01 00:00:00
abstract:BACKGROUNDS:What is not clear as yet is not only the etiology, but also the management of osseous metaplasia. We describe an infertile patient with osseous metaplasia and subsequent pregnancy after treatment and review the literature from infertility perspective. METHOD:We presented a 30-year-old woman with 8 years of...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章,评审
doi:10.1159/000439529
更新日期:2015-01-01 00:00:00
abstract:AIMS:To estimate the prevalence of tumor spread to the parametrium, vagina and uterine corpus in radical hysterectomy specimens and define a subgroup of patients with low-risk of extracervical involvement, who may benefit from less radical surgery. METHODS:We retrospectively reviewed 96 patients with stage IA1-IIA cer...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000353899
更新日期:2013-01-01 00:00:00
abstract::Guillain-Barré syndrome (GBS) is an acute or subacute demyelinating polyneuropathy that rarely complicates pregnancy, but increases maternal and perinatal morbidity. A 15-year-old pregnant woman was admitted with ascending paralysis and acellular lumbar puncture suggestive of GBS. She required mechanical ventilation f...
journal_title:Gynecologic and obstetric investigation
pub_type: 杂志文章
doi:10.1159/000209215
更新日期:2009-01-01 00:00:00
abstract::To study the effect of calcium and vitamin D supplementation on the incidence of toxaemia of pregnancy, 200 randomly selected pregnant women (supplemented group), were put on calcium (375 mg/day) and vitamin D (1,200 IU/day) supplements at 20-24 weeks of pregnancy onwards. Another 200 pregnant women constituted the no...
journal_title:Gynecologic and obstetric investigation
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1159/000298772
更新日期:1987-01-01 00:00:00