Abstract:
:A recent reassessment of the phylogenetic affinities of cetaceans makes it timely to compare their placentation with that of the artiodactyls. We studied the placentae of two sympatric species of dolphin from the Amazon River Basin, representing two distinct families. The umbilical cord branched to supply a bilobed allantoic sac. Small blood vessels and smooth muscle bundles were found within the stroma of the cord. Foci of squamous metaplasia occurred in the allanto-amnion and allantochorion. The interhemal membrane of the placenta was of the epitheliochorial type. Two different types of trophoblastic epithelium were seen. Most was of the simple columnar type and indented by fetal capillaries. However, there were also areolar regions with tall columnar trophoblast and these were more sparsely supplied with capillaries. The endometrium was well vascularised and richly supplied with actively secreting glands. These findings are consistent with the current view that Cetacea are nested within Artiodactyla as sister group to the hippopotamids.
journal_name
Reprod Biol Endocrinoljournal_title
Reproductive biology and endocrinology : RB&Eauthors
da Silva VM,Carter AM,Ambrosio CE,Carvalho AF,Bonatelli M,Lima MC,Miglino MAdoi
10.1186/1477-7827-5-26subject
Has Abstractpub_date
2007-06-28 00:00:00pages
26issn
1477-7827pii
1477-7827-5-26journal_volume
5pub_type
杂志文章abstract:BACKGROUND:Meta-analysis revealed that embryo placement 20 mm from the fundal endometrial surface resulted in higher pregnancy rate, ongoing pregnancy rate, and live birth rate compared with placement 10 mm from the fundal endometrial surface. Pregnancy and implantation rates according to relative position were higher ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,随机对照试验
doi:10.1186/s12958-015-0072-6
更新日期:2015-07-29 00:00:00
abstract:BACKGROUND:The aim of this study was to compare pregnancy rates in patients undergoing IVF/ICSI with embryo transfer after 4 and 5 days of culture in a closed incubation system with integrated time-lapse imaging. METHODS:Out of n = 2207 in vitro fertilization (IVF)/ intracytoplasmic sperm injection (ICSI) cycles perfo...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-017-0253-6
更新日期:2017-05-08 00:00:00
abstract:BACKGROUND:Prostaglandins are important for female reproduction. Prostaglandin-E2 acts via four different receptor subtypes, EP1, EP2, EP3 and EP4 whereas prostaglandin-F2alpha acts through FP. The functions of prostaglandins depend on the expression of their receptors in different uterine cell types. Our aim was to in...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-10-3
更新日期:2012-01-18 00:00:00
abstract:BACKGROUND:Nomegestrol acetate (NOMAC), a synthetic progestogen derived from 19-nor-progesterone, recently completed clinical trials for use with 17beta-estradiol in a new monophasic combined oral contraceptive. In this review, published as well as previously unpublished preclinical studies that detail the effects of N...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-10-85
更新日期:2012-10-08 00:00:00
abstract::Endometrial carcinoma is the most common neoplasm of the female genital tract, accounting for nearly one half of all gynecologic cancers in the Western world. Although intensive research on pathological phenomena of endometrial cancer is currently going on, but exact cause and biological aspects of this disease are no...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-81
更新日期:2009-08-05 00:00:00
abstract:BACKGROUND:The purpose of this study was to test the hypothesis that menstruation is associated with a higher concentration of endometrial cells in peritoneal fluid(PF) and with increased white and red blood cell concentration in PF when compared to nonmenstrual phases of the cycle. METHODS:PF was obtained at laparosc...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-123
更新日期:2009-10-30 00:00:00
abstract:BACKGROUND:In young women with poor ovarian response, luteal-phase ovarian stimulation (LPOS) is a potential method for collecting competent oocytes. The aim of this study was to assess the efficacy of LPOS compared with follicular phase ovarian stimulation (FPOS) in young women with poor ovarian response (POR). METHO...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,随机对照试验
doi:10.1186/s12958-020-00570-7
更新日期:2020-02-07 00:00:00
abstract::Although much is known about the reproductive biology of pond-breeding frogs, there is comparatively little information about terrestrial-breeding anurans, a highly successful and diverse group. This study investigates the activation and in vitro fertilization of eggs of the Puerto Rican coqui frog obtained by hormona...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-2-60
更新日期:2004-08-05 00:00:00
abstract:BACKGROUND:Despite being born with a significant number of primordial cells which representing the ancestor cells of the germ-line, women experience a depletion of ovarian reserve and sub-fertility mid-way into their healthy lives. The poor ovarian response is a substantial limiting factor amplified with higher materna...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-019-0464-0
更新日期:2019-02-11 00:00:00
abstract:BACKGROUND:Embryo selection has been an integral feature of in vitro fertilization (IVF) almost since its inception. Since the advent of extended blastocyst stage embryo culture, and especially with increasing popularity of elective single embryo transfer (eSET), the concept of embryo selection has increasingly become ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-13-3
更新日期:2015-01-11 00:00:00
abstract:BACKGROUND:The fibrinolytic system and its inhibitors play a number of roles, apart from their function in blood haemostasis and thrombosis, namely in ovarian folliculogenesis and in ovulation. Plasminogen is converted to active plasmin at the time of follicular rupture through a decrease in plasminogen activator inhib...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-019-0472-0
更新日期:2019-03-16 00:00:00
abstract::Human spermatozoa generate low levels of reactive oxygen species in order to stimulate key events, such as tyrosine phosphorylation, associated with sperm capacitation. However, if the generation of these potentially pernicious oxygen metabolites becomes elevated for any reason, spermatozoa possess a limited capacity ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-3-67
更新日期:2005-11-29 00:00:00
abstract:BACKGROUND:The placenta is an essential organ that provides nutrients and oxygen to the developing fetus and removes toxic waste products from the fetal circulation. Maintaining placental blood osmotic pressure and blood flow is crucial for viable offspring. The renin-angiotensin system (RAS) in the placenta is a key p...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-015-0088-y
更新日期:2015-08-12 00:00:00
abstract::Gonadotropins extracted from the urine of post-menopausal women have traditionally been used to stimulate folliculogenesis in the treatment of infertility and in assisted reproductive technology (ART). Products, such as human menopausal gonadotropin (hMG), consist not only of a mixture of the hormones, follicle-stimul...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-12-95
更新日期:2014-10-03 00:00:00
abstract::Although Calbindin-D9k (CaBP-9k), a cytosolic calcium binding protein which has calcium binding sites, is expressed in various tissues, i.e., intestine, uterus, and placenta, potential roles of this gene and its protein are not clearly understood. Uterine CaBP-9k may be involved in controlling myometrial activity rela...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/1477-7827-3-66
更新日期:2005-11-16 00:00:00
abstract:BACKGROUND:Estradiol (E2) and progesterone (P) are well known regulators of progesterone receptor (PR) expression in the rat uterus. However, it is not known which receptor subtypes are involved. Little knowledge exist about possible differences in PR regulation through ERalpha or ERbeta, and whether the PR subtypes ar...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-4-47
更新日期:2006-09-11 00:00:00
abstract:BACKGROUND:A limited number of publications have assessed the prevalence of hypertension (HTN) in polycystic ovary syndrome (PCOS) patients with inconclusive results. Since in general populations the occurrence of hypertension is related to age per se, we investigated the prevalence (P) / relative risk (RR) of HTN in p...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章,评审
doi:10.1186/s12958-020-00576-1
更新日期:2020-03-17 00:00:00
abstract:BACKGROUND:The aim of this study was to evaluate the effects of vitrification on morpho-functional parameters (blastomere/chromatin integrity and bioenergy/oxidative potential) of mouse preimplantation embryos. METHODS:In vivo produced mouse (4/16-cell, morulae and blastocyst-stage) embryos were randomly divided into ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-11-27
更新日期:2013-04-03 00:00:00
abstract:BACKGROUND:Spermatozoa are extremely vulnerable to oxidative stress caused by the unbalance between concentrations of reactive oxygen species and antioxidant scavenging systems present inside the male reproductive tract. In spite of a large number of clinical studies that claimed the beneficial effects of antioxidant o...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-11-81
更新日期:2013-08-16 00:00:00
abstract:BACKGROUND:The objectives of this study were to develop an easy and rapid method for measuring gene expression in a small number of cells by real-time PCR without RNA extraction and purification, and to use this method to determine more precisely IGF-I gene expression in the cumulus cells surrounding oocytes. METHODS:...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-3-59
更新日期:2005-10-27 00:00:00
abstract:BACKGROUND:Ovarian follicle growth and maturation requires extensive communication between follicular somatic cells and oocytes. Recently, intercellular cell communication was described involving cell-secreted vesicles called exosomes (50-150 nm), which contain miRNAs and protein, and have been identified in ovarian fo...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-12-44
更新日期:2014-05-26 00:00:00
abstract:BACKGROUND:Low functional ovarian reserve (LFOR) has been associated with hypoandrogenemia and increased embryo aneuploidy, while androgen supplementation has been reported to improve aneuploidy rates. We, therefore, assessed whether in infertile women undergoing in vitro fertilization (IVF) androgen concentrations are...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-015-0034-z
更新日期:2015-05-06 00:00:00
abstract:PURPOSE:To investigate the associations between blastocyst development and the sex ratio (male:female) among singleton live births resulting from single-blastocyst frozen embryo transfer (FET) cycles. METHODS:Patients with singleton live births following the first autologous single FET of non- preimplantation genetic ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-020-00623-x
更新日期:2020-07-15 00:00:00
abstract:BACKGROUND:Through this prospective study, we aimed to explore the change of molecular modification after the transient scrotal hyperthermia on human sperm. METHODS:Ten healthy subjects selected with strict screening criteria underwent testicular warming in a 43 °C water bath for 30 min a day for 10 consecutive days. ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-020-00640-w
更新日期:2020-08-12 00:00:00
abstract::The endometrium undergoes cyclic remodelling throughout the menstrual cycle in preparation for embryo implantation which occurs in a short window during the mid-secretory phase. It is during this short 'receptive window' that the endometrial luminal epithelium acquires adhesive capacity permitting blastocysts firm adh...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/s12958-020-00682-0
更新日期:2020-12-14 00:00:00
abstract:BACKGROUND:Wolfram Syndrome (WS) is an autosomal recessive disorder characterised by non-autoimmune diabetes mellitus, optic atrophy, cranial diabetes insipidus and sensorineural deafness. Some reports have described hypogonadism in male WS patients. The aim of our study was to find out whether Wfs1 deficient (Wfs1KO) ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-82
更新日期:2009-08-10 00:00:00
abstract:BACKGROUND:Anti-thyroid antibodies (ATA), even if not associated with thyroid dysfunction, are suspected to cause poorer outcome of in vitro fertilization (IVF). METHODS:We retrospectively analyzed: (a) the prevalence of ATA in euthyroid infertile women, (b) IVF outcome in euthyroid, ATA+ patients, and (c) the effect ...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-7-137
更新日期:2009-11-27 00:00:00
abstract::The corpus luteum is an endocrine gland whose limited lifespan is hormonally programmed. This debate article summarizes findings of our research group that challenge the principle that the end of function of the corpus luteum or luteal regression, once triggered, cannot be reversed. Overturning luteal regression by ph...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-4-53
更新日期:2006-10-30 00:00:00
abstract:BACKGROUND:Experiments were designed to identify the developmental expression and function of the Dickkopf-Like1 (DKKL1/Dkkl1) gene in humans and mice. METHODS:Mouse testes cDNA samples were collected at multiple postnatal times (days 4, 9, 18, 35, and 54, as well as at 6 months) and hybridized to Affymetrix mouse who...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-10-51
更新日期:2012-07-21 00:00:00
abstract:BACKGROUND:Mammalian oocyte meiotic maturation involves a number of important processes, including spindle assembly and migration, cortical reorganization and polar body extrusion. Numerous proteins contribute to these processes, but it is unknown whether MKlp2 (mitotic kinesin-like protein 2; also called KIF20A), a mi...
journal_title:Reproductive biology and endocrinology : RB&E
pub_type: 杂志文章
doi:10.1186/1477-7827-11-117
更新日期:2013-12-21 00:00:00