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
Developmental Biology2018Q2
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
Obstetrics and Gynecology2018Q1
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
Reproductive Medicine2018Q1

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)19991.904
Cites / Doc. (4 years)20002.432
Cites / Doc. (4 years)20012.460
Cites / Doc. (4 years)20022.343
Cites / Doc. (4 years)20032.946
Cites / Doc. (4 years)20042.951
Cites / Doc. (4 years)20053.010
Cites / Doc. (4 years)20063.579
Cites / Doc. (4 years)20073.246
Cites / Doc. (4 years)20082.891
Cites / Doc. (4 years)20093.027
Cites / Doc. (4 years)20103.453
Cites / Doc. (4 years)20113.806
Cites / Doc. (4 years)20124.006
Cites / Doc. (4 years)20134.117
Cites / Doc. (4 years)20143.526
Cites / Doc. (4 years)20153.533
Cites / Doc. (4 years)20163.218
Cites / Doc. (4 years)20172.913
Cites / Doc. (4 years)20183.091
Cites / Doc. (3 years)19991.904
Cites / Doc. (3 years)20002.250
Cites / Doc. (3 years)20012.383
Cites / Doc. (3 years)20022.454
Cites / Doc. (3 years)20033.000
Cites / Doc. (3 years)20043.033
Cites / Doc. (3 years)20053.264
Cites / Doc. (3 years)20063.393
Cites / Doc. (3 years)20073.208
Cites / Doc. (3 years)20082.926
Cites / Doc. (3 years)20092.933
Cites / Doc. (3 years)20103.380
Cites / Doc. (3 years)20114.008
Cites / Doc. (3 years)20124.024
Cites / Doc. (3 years)20134.002
Cites / Doc. (3 years)20143.382
Cites / Doc. (3 years)20153.448
Cites / Doc. (3 years)20163.074
Cites / Doc. (3 years)20172.888
Cites / Doc. (3 years)20182.892
Cites / Doc. (2 years)19991.652
Cites / Doc. (2 years)20002.218
Cites / Doc. (2 years)20012.509
Cites / Doc. (2 years)20022.367
Cites / Doc. (2 years)20032.887
Cites / Doc. (2 years)20043.076
Cites / Doc. (2 years)20052.996
Cites / Doc. (2 years)20063.052
Cites / Doc. (2 years)20073.171
Cites / Doc. (2 years)20082.732
Cites / Doc. (2 years)20092.843
Cites / Doc. (2 years)20103.440
Cites / Doc. (2 years)20114.129
Cites / Doc. (2 years)20123.777
Cites / Doc. (2 years)20133.660
Cites / Doc. (2 years)20143.137
Cites / Doc. (2 years)20153.313
Cites / Doc. (2 years)20162.922
Cites / Doc. (2 years)20172.422
Cites / Doc. (2 years)20182.745
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 Cites199975
Self Cites2000154
Self Cites2001152
Self Cites2002143
Self Cites2003191
Self Cites2004159
Self Cites2005150
Self Cites2006166
Self Cites2007197
Self Cites2008170
Self Cites2009221
Self Cites2010228
Self Cites2011245
Self Cites2012280
Self Cites2013276
Self Cites2014222
Self Cites2015220
Self Cites2016188
Self Cites2017221
Self Cites2018133
Total Cites1999533
Total Cites2000639
Total Cites2001772
Total Cites2002859
Total Cites20031122
Total Cites20041189
Total Cites20051250
Total Cites20061313
Total Cites20071187
Total Cites20081261
Total Cites20091393
Total Cites20101707
Total Cites20112004
Total Cites20122225
Total Cites20132301
Total Cites20142070
Total Cites20152017
Total Cites20161869
Total Cites20171675
Total Cites20181825
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 document19991.636
External Cites per document20001.708
External Cites per document20011.914
External Cites per document20022.046
External Cites per document20032.489
External Cites per document20042.628
External Cites per document20052.872
External Cites per document20062.964
External Cites per document20072.676
External Cites per document20082.531
External Cites per document20092.467
External Cites per document20102.929
External Cites per document20113.518
External Cites per document20123.517
External Cites per document20133.522
External Cites per document20143.020
External Cites per document20153.072
External Cites per document20162.765
External Cites per document20172.507
External Cites per document20182.681
Cites per document19991.904
Cites per document20002.250
Cites per document20012.383
Cites per document20022.454
Cites per document20033.000
Cites per document20043.033
Cites per document20053.264
Cites per document20063.393
Cites per document20073.208
Cites per document20082.926
Cites per document20092.933
Cites per document20103.380
Cites per document20114.008
Cites per document20124.024
Cites per document20134.002
Cites per document20143.382
Cites per document20153.448
Cites per document20163.074
Cites per document20172.888
Cites per document20182.892
% 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 documents199920
Non-citable documents200016
Non-citable documents200111
Non-citable documents200213
Non-citable documents200316
Non-citable documents200427
Non-citable documents200526
Non-citable documents200629
Non-citable documents200724
Non-citable documents200826
Non-citable documents200928
Non-citable documents201030
Non-citable documents201137
Non-citable documents201243
Non-citable documents201349
Non-citable documents201439
Non-citable documents201528
Non-citable documents201618
Non-citable documents201722
Non-citable documents201827
Citable documents1999280
Citable documents2000284
Citable documents2001324
Citable documents2002350
Citable documents2003374
Citable documents2004392
Citable documents2005383
Citable documents2006387
Citable documents2007370
Citable documents2008431
Citable documents2009475
Citable documents2010505
Citable documents2011500
Citable documents2012553
Citable documents2013575
Citable documents2014612
Citable documents2015585
Citable documents2016608
Citable documents2017580
Citable documents2018631
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 documents1999115
Uncited documents200089
Uncited documents200195
Uncited documents200294
Uncited documents200381
Uncited documents200492
Uncited documents200598
Uncited documents200693
Uncited documents200795
Uncited documents2008105
Uncited documents2009102
Uncited documents201084
Uncited documents201186
Uncited documents2012102
Uncited documents2013118
Uncited documents2014123
Uncited documents2015128
Uncited documents2016122
Uncited documents2017130
Uncited documents2018146
Cited documents1999185
Cited documents2000211
Cited documents2001240
Cited documents2002269
Cited documents2003309
Cited documents2004327
Cited documents2005311
Cited documents2006323
Cited documents2007299
Cited documents2008352
Cited documents2009401
Cited documents2010451
Cited documents2011451
Cited documents2012494
Cited documents2013506
Cited documents2014528
Cited documents2015485
Cited documents2016504
Cited documents2017472
Cited documents2018512
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