scholarly journals Early Embryonic Loss Following Intravaginal Zika Virus Challenge in Rhesus Macaques

2021 ◽  
Vol 12 ◽  
Author(s):  
Christina M. Newman ◽  
Alice F. Tarantal ◽  
Michele L. Martinez ◽  
Heather A. Simmons ◽  
Terry K. Morgan ◽  
...  
Keyword(s):  
Gestational Age ◽  
Zika Virus ◽  
Rhesus Macaques ◽  
Sexual Transmission ◽  
First Trimester ◽  
Sample Collection ◽  
Post Challenge ◽  
Virus Challenge ◽  
Adverse Pregnancy ◽  
Low Passage

Zika virus (ZIKV) is an arthropod-borne virus (arbovirus) and is primarily transmitted by Aedes species mosquitoes; however, ZIKV can also be sexually transmitted. During the initial epidemic and in places where ZIKV is now considered endemic, it is difficult to disentangle the risks and contributions of sexual versus vector-borne transmission to adverse pregnancy outcomes. To examine the potential impact of sexual transmission of ZIKV on pregnancy outcome, we challenged three rhesus macaques (Macaca mulatta) three times intravaginally with 1 x 107 PFU of a low passage, African lineage ZIKV isolate (ZIKV-DAK) in the first trimester (~30 days gestational age). Samples were collected from all animals initially on days 3 through 10 post challenge, followed by twice, and then once weekly sample collection; ultrasound examinations were performed every 3-4 days then weekly as pregnancies progressed. All three dams had ZIKV RNA detectable in plasma on day 3 post-ZIKV challenge. At approximately 45 days gestation (17-18 days post-challenge), two of the three dams were found with nonviable embryos by ultrasound. Viral RNA was detected in recovered tissues and at the maternal-fetal interface (MFI) in both cases. The remaining viable pregnancy proceeded to near term (~155 days gestational age) and ZIKV RNA was detected at the MFI but not in fetal tissues. These results suggest that sexual transmission of ZIKV may represent an underappreciated risk of pregnancy loss during early gestation.

scholarly journals Early embryonic loss following intravaginal Zika virus challenge in rhesus macaques

2021 ◽  
Author(s):  
Christina M Newman ◽  
Alice F. Tarantal ◽  
Michele L. Martinez ◽  
Heather A Simmons ◽  
Terry K Morgan ◽  
...  
Keyword(s):  
Gestational Age ◽  
Zika Virus ◽  
Rhesus Macaques ◽  
Sexual Transmission ◽  
First Trimester ◽  
Sample Collection ◽  
Post Challenge ◽  
Virus Challenge ◽  
Adverse Pregnancy ◽  
Low Passage

Zika virus (ZIKV) is an arthropod-borne virus (arbovirus) and is primarily transmitted by Aedes species mosquitoes; however, ZIKV can also be sexually transmitted. During the initial epidemic and in places where ZIKV is now considered endemic, it is difficult to disentangle the risks and contributions of sexual versus vector-borne transmission to adverse pregnancy outcomes. To examine the potential impact of sexual transmission of ZIKV on pregnancy outcome, we challenged three rhesus macaques (Macaca mulatta) three times intravaginally with 1 x 10^7 PFU of a low passage, African lineage ZIKV isolate (ZIKV-DAK) in the first trimester (~30 days gestational age). Samples were collected from all animals initially on days 3 through 10 post challenge, followed by twice, and then once weekly sample collection; ultrasound examinations were performed every 3-4 days then weekly as pregnancies progressed. All three dams had ZIKV RNA detectable in plasma on day 3 post-ZIKV challenge. At approximately 45 days gestation (17-18 days post-challenge), two of the three dams were found to have nonviable embryos by ultrasound. Viral RNA was detected in recovered tissues and at the maternal-fetal interface (MFI) in both cases. The remaining viable pregnancy proceeded to near term (~155 days gestational age) and ZIKV RNA was detected at the MFI but not in fetal tissues. These results suggest that sexual transmission of ZIKV may represent an underappreciated risk of pregnancy loss during early gestation.

scholarly journals Ultrasound Assessment of Twin Reversed Arterial Perfusion Sequence for the Prediction of Adverse Pregnancy Outcomes in the First Trimester

2021 ◽  
Author(s):  
Ying Tang ◽  
Yan Zeng ◽  
Taizhu Yang ◽  
Pan Yang ◽  
Shan Bao ◽  
...  
Keyword(s):  
Gestational Age ◽  
Pregnancy Outcomes ◽  
First Trimester ◽  
Adverse Pregnancy Outcomes ◽  
University Hospital ◽  
Intrauterine Death ◽  
Crown Rump Length ◽  
Arterial Perfusion ◽  
Adverse Pregnancy ◽  
Twin Reversed Arterial Perfusion

Abstract ObjectivesTo investigate twin reversed arterial perfusion (TRAP) sequence for the prediction of TRAP-related adverse pregnancy outcomes at the gestational age of 11-14 weeks. MethodsPregnant women in the first trimester diagnosed with TRAP were recruited at West China Second University Hospital from January 2015 to June 2018. Systematic screening for the pump twin’s crown-rump length (CRL) and acardiac twin’s upper pole-rump length (URL) was conducted using ultrasonic detection. The (CRL-URL)/CRL and URL/CRL ratios were used to assess the pregnancy outcomes for the pump twin. ResultsTwenty-one pregnant women aged 21–39 years with a gestation of 11-14 weeks were recruited. TRAP was diagnosed on average (± standard deviation [SD]) at pregnancy week 13.1 ± 0.18. The pump twins’ mean (± SD) CRL was 6.65 ± 1.1 cm. The incidence of intrauterine death for the pump twins was 19.0% (n=4), the miscarriage rate was 14.3% (n=3), and the live birth rate was 66.7% (n=14). The (CRL-URL)/CRL ratios between the non-survival (intrauterine death and miscarriage) and survival groups significantly differed (0.33 ± 0.08 vs. 0.58 ± 0.08, p < 0.05). Similarly, the URL/CRL ratios between the non-survival and survival groups significantly differed (0.67 ± 0.08 vs. 0.42 ± 0.08, p < 0.05). ConclusionsThe (CRL-URL)/CRL and URL/CRL ratios were valuable indicators for determining pregnancy outcomes of pump twins with TRAP at an early gestational age.

scholarly journals Association between neighbourhood deprivation, fetal growth, small-for-gestational age and preterm birth: a population-based prospective cohort study

BMJ Open ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. e049075
Author(s):  
Dionne V Gootjes ◽  
Anke G Posthumus ◽  
Vincent W V Jaddoe ◽  
Eric A P Steegers
Keyword(s):  
Risk Factors ◽  
Cohort Study ◽  
Preterm Birth ◽  
Fetal Growth ◽  
Gestational Age ◽  
Pregnancy Outcomes ◽  
First Trimester ◽  
Adverse Pregnancy Outcomes ◽  
Neighbourhood Deprivation ◽  
Adverse Pregnancy

ObjectiveTo study the associations between neighbourhood deprivation and fetal growth, including growth in the first trimester, and adverse pregnancy outcomes.DesignProspective cohort study.SettingThe Netherlands, Rotterdam.Participants8617 live singleton births from the Generation R cohort study.ExpositionLiving in a deprived neighbourhood.Main outcome measuresFetal growth trajectories of head circumference, weight and length.Secondary outcomes measuresSmall-for-gestational age (SGA) and preterm birth (PTB).ResultsNeighbourhood deprivation was not associated with first trimester growth. However, a higher neighbourhood status score (less deprivation) was associated with increased fetal growth in the second and third trimesters (eg, estimated fetal weight; adjusted regression coefficient 0.04, 95% CI 0.02 to 0.06). Less deprivation was also associated with decreased odds of SGA (adjusted OR 0.91, 95% CI 0.86 to 0.97, p=0.01) and PTB (adjusted OR 0.89, 95% CI 0.82 to 0.96, p=0.01).ConclusionsWe found an association between neighbourhood deprivation and fetal growth in the second and third trimester pregnancy, but not with first trimester growth. Less neighbourhood deprivation is associated with lower odds of adverse pregnancy outcomes. The associations remained after adjustment for individual-level risk factors. This supports the hypothesis that living in a deprived neighbourhood acts as an independent risk factor for fetal growth and adverse pregnancy outcomes, above and beyond individual risk factors.

High Fetal Fraction on First Trimester Cell-Free DNA Aneuploidy Screening and Adverse Pregnancy Outcomes

2019 ◽  
Vol 37 (01) ◽  
pp. 008-013 ◽  
Author(s):  
Lydia L. Shook ◽  
Mark A. Clapp ◽  
Penelope S. Roberts ◽  
Sarah N. Bernstein ◽  
Ilona T. Goldfarb
Keyword(s):  
Preterm Birth ◽  
Gestational Age ◽  
Small For Gestational Age ◽  
First Trimester ◽  
Hypertensive Disorders Of Pregnancy ◽  
Aneuploidy Screening ◽  
Hypertensive Disorders ◽  
Increased Risk ◽  
Adverse Pregnancy ◽  
Fetal Fraction

Abstract Objective To test the hypothesis that high fetal fraction (FF) on first trimester cell-free deoxyribonucleic acid (cfDNA) aneuploidy screening is associated with adverse perinatal outcomes. Study Design This is a single-institution retrospective cohort study of women who underwent cfDNA screening at <14 weeks' gestation and delivered a singleton infant between July 2016 and June 2018. Women with abnormal results were excluded. Women with high FF (≥95th percentile) were compared with women with normal FF (5th–95th percentiles). Outcomes investigated were preterm birth, small for gestational age, and hypertensive disorders of pregnancy. Results A total of 2,033 women met inclusion criteria. The mean FF was 10.0%, and FF >16.5% was considered high (n = 102). Women with high FF had a greater chance of delivering a small for gestational age infant <fifth percentile, with an adjusted odds ratio of 2.4 (95% confidence interval: 1.1–4.8, p = 0.039). There was no significant association between high FF and either preterm birth or hypertensive disorders of pregnancy. Conclusion Women with a high FF in the first trimester are at increased risk of delivering a small for gestational age infant <fifth percentile. Further investigation into the clinical implications of a high FF is warranted.

scholarly journals A COMPARATIVE STUDY OF MATERNAL OUTCOME IN FIRST-TRIMESTER VAGINAL BLEEDING IN THE DEPARTMENT OF OBSTETRICS AND GYNAECOLOGY, SMS MEDICAL COLLEGE, JAIPUR

2021 ◽  
Vol 5 (7) ◽  
Author(s):  
Savita Meena ◽  
Suniti Verma ◽  
R N Sehra ◽  
Suman Choudhary
Keyword(s):  
Gestational Age ◽  
Vaginal Bleeding ◽  
Adverse Pregnancy Outcome ◽  
First Trimester ◽  
Control Group ◽  
Case Group ◽  
Medical College ◽  
Obstetrics And Gynaecology ◽  
Increased Risk ◽  
Adverse Pregnancy

Background: The outcome of ongoing pregnancies after first trimester vaginal bleeding is of relevance to women and obstetricians for planning antenatal care and clinical interventions in pregnancy. Hence, this study was conducted to identify the risks associated with first trimester bleed which may facilitate decision making regarding mode, place and timing of delivery during management, which may improve maternal and neonatal outcome. Methods: Hospital based comparative prospective study conducted at Department of Obstetrics and Gynaecology, SMS Medical College & associated Hospitals, Jaipur. Results: APH was found in 4 (8.00%) patients of case group and nil in control group. So, APH was found to be more in the case group than control group but was statistically not significant. Pre-eclampsia was found in 4 (8.00%) in case group and 3 (6.00%) in control group with statistically insignificant difference between the two groups.  26 (52.00%) delivered at the gestational age of ?37 weeks, whereas only 8 (16%) of control group delivered at ?37 weeks. So, the gestational age at delivery of control group subjects was found to be higher as compared to case group subjects and the difference was statistically significant (p=0.001). Conclusion: Threatened miscarriage in early pregnancy increases the risk of adverse pregnancy outcome. In our study, these patients were found to be at an increased risk of preterm delivery, PPROM. Keywords: PROM, Miscarriage, Gestational age

scholarly journals Zika Virus and the Risk of Developing Microcephaly in Infants: A Systematic Review

2020 ◽  
Vol 17 (11) ◽  
pp. 3806 ◽  
Author(s):  
Evangelia Antoniou ◽  
Eirini Orovou ◽  
Angeliki Sarella ◽  
Maria Iliadou ◽  
Nikolaos Rigas ◽  
...  
Keyword(s):  
Systematic Review ◽  
Zika Virus ◽  
Case Reports ◽  
Public Health Problem ◽  
First Trimester ◽  
Viral Disease ◽  
Epidemiological Studies ◽  
Major Public Health Problem ◽  
Full Spectrum ◽  
Adverse Pregnancy

The global epidemic of Zika virus has been a major public health problem affecting pregnant women and their infants. Zika virus causes a viral disease transmitted to humans mainly by the infected Aedes mosquito bite. The infection is not severe in most cases; however, there is evidence that infection during pregnancy may be associated with fetal genetic abnormalities (including microcephaly). In addition to microcephaly and other malformations, some specific lesions in the central nervous system have been reported. The aim of this systematic review was to determine the risk of developing microcephaly in infants whose mothers were infected with Zika virus in pregnancy. Epidemiological studies and case reports were incorporated in our review, finally including 15 articles from an initial pool of 355 related papers. Most studies have linked maternal infection during pregnancy to the development of neonatal microcephaly. The period considered most dangerous is the first trimester and the beginning or the whole of the second trimester. In order to understand the relationship between Zika virus and microcephaly in infants, a cohort study will be able to estimate the time from the onset of Zika infection and the full spectrum of adverse pregnancy outcomes.

scholarly journals Zika Virus Causes Acute and Chronic Prostatitis in Mice and Macaques

2019 ◽  
Vol 221 (9) ◽  
pp. 1506-1517 ◽  
Author(s):  
Jacques Halabi ◽  
Brett W Jagger ◽  
Vanessa Salazar ◽  
Emma S Winkler ◽  
James P White ◽  
...  
Keyword(s):  
Zika Virus ◽  
Chronic Prostatitis ◽  
Animal Studies ◽  
Reproductive Tract ◽  
Rhesus Macaques ◽  
Sexual Transmission ◽  
Vital Role ◽  
Male Reproductive Tract ◽  
Virus Clearance ◽  
Sperm Counts

Abstract Background Sexual transmission and persistence of Zika virus (ZIKV) in the male reproductive tract has raised concerned for potential damaging effects on function. Animal studies have demonstrated that ZIKV virus can infect and damage the testis and epididymis, and these results has been correlated to lower sperm counts in ZIKV-infected humans. The prostate plays a vital role in the male reproductive tract, with acute and chronic prostatitis linked to male infertility. Methods In this study, we evaluated the effects of ZIKV virus on the prostate in mice and nonhuman primates. Results In mice, ZIKV infected the prostate and triggered inflammation that persisted even after virus clearance. Evidence of chronic prostatitis associated with ZIKV infection remained for several months. Similar histological findings were observed in the prostate of ZIKV-infected rhesus macaques. Conclusions These studies establish that ZIKV replicates in the prostate and can cause acute and chronic inflammatory and proliferative changes in mouse and nonhuman primate models.

scholarly journals Zika Virus Infection in a Cohort of Pregnant Women with Exanthematic Disease in Manaus, Brazilian Amazon

Viruses ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 1362
Author(s):  
Elijane de Fátima Redivo ◽  
Camila Bôtto Menezes ◽  
Márcia da Costa Castilho ◽  
Marianna Brock ◽  
Evela da Silva Magno ◽  
...  
Keyword(s):  
Virus Infection ◽  
Pregnant Women ◽  
Zika Virus ◽  
Descriptive Analysis ◽  
First Trimester ◽  
Adverse Outcomes ◽  
Rt Pcr ◽  
Zika Virus Infection ◽  
Adverse Pregnancy ◽  
In Pregnancy

The epidemic transmission of Zika virus (ZIKV) in Brazil has been identified as a cause of microcephaly and other neurological malformations in the babies of ZIKV-infected women. The frequency of adverse outcomes of Zika virus infection (ZIKVi) in pregnancy differs depending on the characteristics of exposure to infection, the time of recruitment of research participants, and the outcomes to be observed. This study provides a descriptive analysis—from the onset of symptoms to delivery—of a cohort registered as having maternal ZIKVi in pregnancy, from November 2015 to December 2016. Suspected cases were registered at a referral center for infectious and tropical diseases in Manaus, in the Amazonian region of Brazil. Of 834 women notified, 762 women with confirmed pregnancies were enrolled. Reverse-transcriptase polymerase chain reaction (RT-PCR) confirmed ZIKVi in 42.3% of the cohort. In 35.2% of the cohort, ZIKV was the sole infection identified. Severe adverse pregnancy outcomes (miscarriage, stillbirth, or microcephaly) were observed in both RT-PCR ZIKV-positive (5.0%) and ZIKV-negative (1.8%) cases (RR 3.1; 95% IC 1.4–7.3; p < 0.05), especially during the first trimester of pregnancy (RR 6.2, 95% IC 2.3–16.5; p < 0.001). Although other infectious rash diseases were observed in the pregnant women in the study, having confirmed maternal ZIKVi was the most important risk factor for serious adverse pregnancy events.

scholarly journals Demographic, Clinical and Microbiological Characteristics of Maternity Patients: A Canadian Clinical Cohort Study

2002 ◽  
Vol 13 (5) ◽  
pp. 311-318 ◽  
Author(s):  
Wanda M Wenman ◽  
Ivanna V Tataryn ◽  
Michel R Joffres ◽  
Rachelle Pearson ◽  
Michael GA Grace ◽  
...  
Keyword(s):  
Cohort Study ◽  
Birth Weight ◽  
Postsecondary Education ◽  
Gestational Age ◽  
Mycoplasma Hominis ◽  
First Trimester ◽  
Clinical Cohort ◽  
Microbiological Characteristics ◽  
Adverse Pregnancy ◽  
One Year

OBJECTIVE: To determine the demographic, clinical and microbiological characteristics of a representative Canadian obstetrical population.DESIGN: A one-year cohort study of all maternity patients who were followed to delivery, using detailed patient questionnaires containing more than 60 demographic and clinical variables, and three microbiological evaluations during gestation - first trimester, 26 to 30 weeks, and labour and delivery. Outcome measurements included birth weight and gestational age.SETTING: Labour and delivery suites of all office obstetrical practices affiliated with a single hospital.POPULATION STUDIED: A consecutive sample of pregnant women in the study practices during one year were eligible for enrolment; 2237 consecutive patients were approached for consent, 2047 enrolled and 1811 completed the study through delivery.RESULTS: The average patient was white, married and 29 years of age. Slightly more than half of the patients had postsecondary education, but 10% fell below the national poverty line for income. Frequency of factors linked to adverse pregnancy outcomes included cigarette smoking (19%), alcohol ingestion (18%), previously having had a premature infant (7%), and maternal diabetes (2%). Overall prevalence of genital microbes variously implicated in prematurity was 37% for ureaplasma, 11% for group B streptococcus and 4% forMycoplasma hominis. Prevalence of bacterial vaginosis was 14%. The median gestational age for the cohort was 39 weeks, with 7% of infants born less than 37 weeks' gestation. Mean birth weight was 3415 g.CONCLUSIONS: The present clinical cohort represents demographic and medical characteristics of the Canadian obstetrical population. The birth outcomes are consistent with national data. This database provides valuable information about a general obstetrical population that is managed by a universal health care system.

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