Scimago Journal & Country Rank


Country United Kingdom  - SIR icon SIR Ranking of United Kingdom
H Index
Subject Area and CategoryBiochemistry, Genetics and Molecular Biology
Developmental Biology

Obstetrics and Gynecology
Reproductive Medicine
PublisherW. B. Saunders Co., Ltd.
Publication typeJournals
Coverage1977, 1980-ongoing
Scope Placenta is the International forum providing up to the minute information on all scientific and clinical investigations pertaining to placental research and their applications. The journal includes full length and mini reviews, original articles, book reviews, announcements and reports, abstracts of important meetings and scientific letters to the Editor.


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The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

Developmental Biology1999Q2
Developmental Biology2000Q2
Developmental Biology2001Q2
Developmental Biology2002Q2
Developmental Biology2003Q2
Developmental Biology2004Q2
Developmental Biology2005Q2
Developmental Biology2006Q2
Developmental Biology2007Q2
Developmental Biology2008Q2
Developmental Biology2009Q2
Developmental Biology2010Q2
Developmental Biology2011Q2
Developmental Biology2012Q2
Developmental Biology2013Q2
Developmental Biology2014Q2
Developmental Biology2015Q2
Developmental Biology2016Q2
Developmental Biology2017Q2
Obstetrics and Gynecology1999Q1
Obstetrics and Gynecology2000Q1
Obstetrics and Gynecology2001Q1
Obstetrics and Gynecology2002Q1
Obstetrics and Gynecology2003Q1
Obstetrics and Gynecology2004Q1
Obstetrics and Gynecology2005Q1
Obstetrics and Gynecology2006Q1
Obstetrics and Gynecology2007Q1
Obstetrics and Gynecology2008Q1
Obstetrics and Gynecology2009Q1
Obstetrics and Gynecology2010Q1
Obstetrics and Gynecology2011Q1
Obstetrics and Gynecology2012Q1
Obstetrics and Gynecology2013Q1
Obstetrics and Gynecology2014Q1
Obstetrics and Gynecology2015Q1
Obstetrics and Gynecology2016Q1
Obstetrics and Gynecology2017Q1
Reproductive Medicine1999Q1
Reproductive Medicine2000Q1
Reproductive Medicine2001Q1
Reproductive Medicine2002Q1
Reproductive Medicine2003Q1
Reproductive Medicine2004Q1
Reproductive Medicine2005Q1
Reproductive Medicine2006Q1
Reproductive Medicine2007Q1
Reproductive Medicine2008Q1
Reproductive Medicine2009Q1
Reproductive Medicine2010Q1
Reproductive Medicine2011Q1
Reproductive Medicine2012Q1
Reproductive Medicine2013Q1
Reproductive Medicine2014Q1
Reproductive Medicine2015Q1
Reproductive Medicine2016Q1
Reproductive Medicine2017Q1

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per documentYearValue
Cites / Doc. (4 years)19991.860
Cites / Doc. (4 years)20002.387
Cites / Doc. (4 years)20012.430
Cites / Doc. (4 years)20022.353
Cites / Doc. (4 years)20032.969
Cites / Doc. (4 years)20042.943
Cites / Doc. (4 years)20052.988
Cites / Doc. (4 years)20063.741
Cites / Doc. (4 years)20073.385
Cites / Doc. (4 years)20083.109
Cites / Doc. (4 years)20093.196
Cites / Doc. (4 years)20103.431
Cites / Doc. (4 years)20113.811
Cites / Doc. (4 years)20124.007
Cites / Doc. (4 years)20134.102
Cites / Doc. (4 years)20143.510
Cites / Doc. (4 years)20153.440
Cites / Doc. (4 years)20163.140
Cites / Doc. (4 years)20172.792
Cites / Doc. (3 years)19991.860
Cites / Doc. (3 years)20002.221
Cites / Doc. (3 years)20012.384
Cites / Doc. (3 years)20022.471
Cites / Doc. (3 years)20033.030
Cites / Doc. (3 years)20043.003
Cites / Doc. (3 years)20053.243
Cites / Doc. (3 years)20063.541
Cites / Doc. (3 years)20073.345
Cites / Doc. (3 years)20083.162
Cites / Doc. (3 years)20093.082
Cites / Doc. (3 years)20103.366
Cites / Doc. (3 years)20114.012
Cites / Doc. (3 years)20124.014
Cites / Doc. (3 years)20133.988
Cites / Doc. (3 years)20143.365
Cites / Doc. (3 years)20153.356
Cites / Doc. (3 years)20163.003
Cites / Doc. (3 years)20172.772
Cites / Doc. (2 years)19991.608
Cites / Doc. (2 years)20002.213
Cites / Doc. (2 years)20012.523
Cites / Doc. (2 years)20022.392
Cites / Doc. (2 years)20032.882
Cites / Doc. (2 years)20043.034
Cites / Doc. (2 years)20052.982
Cites / Doc. (2 years)20063.162
Cites / Doc. (2 years)20073.316
Cites / Doc. (2 years)20082.941
Cites / Doc. (2 years)20093.003
Cites / Doc. (2 years)20103.417
Cites / Doc. (2 years)20114.125
Cites / Doc. (2 years)20123.769
Cites / Doc. (2 years)20133.653
Cites / Doc. (2 years)20143.117
Cites / Doc. (2 years)20153.214
Cites / Doc. (2 years)20162.856
Cites / Doc. (2 years)20172.328
Total Cites 

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Self Cites199973
Self Cites2000152
Self Cites2001151
Self Cites2002143
Self Cites2003191
Self Cites2004159
Self Cites2005150
Self Cites2006187
Self Cites2007204
Self Cites2008187
Self Cites2009236
Self Cites2010229
Self Cites2011247
Self Cites2012281
Self Cites2013276
Self Cites2014222
Self Cites2015220
Self Cites2016188
Self Cites2017219
Total Cites1999517
Total Cites2000622
Total Cites2001763
Total Cites2002855
Total Cites20031121
Total Cites20041177
Total Cites20051242
Total Cites20061374
Total Cites20071308
Total Cites20081429
Total Cites20091547
Total Cites20101727
Total Cites20112038
Total Cites20122224
Total Cites20132293
Total Cites20142066
Total Cites20151970
Total Cites20161832
Total Cites20171608
External Cites per Doc 
Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

External Cites per document19991.597
External Cites per document20001.679
External Cites per document20011.913
External Cites per document20022.058
External Cites per document20032.514
External Cites per document20042.597
External Cites per document20052.851
External Cites per document20063.059
External Cites per document20072.824
External Cites per document20082.748
External Cites per document20092.612
External Cites per document20102.920
External Cites per document20113.526
External Cites per document20123.507
External Cites per document20133.508
External Cites per document20143.003
External Cites per document20152.981
External Cites per document20162.695
External Cites per document20172.395
Cites per document19991.860
Cites per document20002.221
Cites per document20012.384
Cites per document20022.471
Cites per document20033.030
Cites per document20043.003
Cites per document20053.243
Cites per document20063.541
Cites per document20073.345
Cites per document20083.162
Cites per document20093.082
Cites per document20103.366
Cites per document20114.012
Cites per document20124.014
Cites per document20133.988
Cites per document20143.365
Cites per document20153.356
Cites per document20163.003
Cites per document20172.772
% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

YearInternational Collaboration
Citable documents 
Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Non-citable documents199916
Non-citable documents200014
Non-citable documents200115
Non-citable documents200217
Non-citable documents200320
Non-citable documents200427
Non-citable documents200526
Non-citable documents200628
Non-citable documents200723
Non-citable documents200825
Non-citable documents200929
Non-citable documents201031
Non-citable documents201138
Non-citable documents201243
Non-citable documents201349
Non-citable documents201439
Non-citable documents201528
Non-citable documents201618
Non-citable documents201722
Citable documents1999278
Citable documents2000280
Citable documents2001320
Citable documents2002346
Citable documents2003370
Citable documents2004392
Citable documents2005383
Citable documents2006388
Citable documents2007391
Citable documents2008452
Citable documents2009502
Citable documents2010513
Citable documents2011508
Citable documents2012554
Citable documents2013575
Citable documents2014614
Citable documents2015587
Citable documents2016610
Citable documents2017580
Cited documents 
Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Uncited documents1999113
Uncited documents200088
Uncited documents200196
Uncited documents200296
Uncited documents200381
Uncited documents200492
Uncited documents200599
Uncited documents200690
Uncited documents200796
Uncited documents2008100
Uncited documents2009105
Uncited documents201086
Uncited documents201188
Uncited documents2012102
Uncited documents2013119
Uncited documents2014126
Uncited documents2015135
Uncited documents2016124
Uncited documents2017137
Cited documents1999181
Cited documents2000206
Cited documents2001239
Cited documents2002267
Cited documents2003309
Cited documents2004327
Cited documents2005310
Cited documents2006326
Cited documents2007318
Cited documents2008377
Cited documents2009426
Cited documents2010458
Cited documents2011458
Cited documents2012495
Cited documents2013505
Cited documents2014527
Cited documents2015480
Cited documents2016504
Cited documents2017465
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