Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W2916022982', 'doi': 'https://doi.org/10.1177/1933719119831778', 'title': 'Diagnosis of Placental Position by Early First-Trimester Ultrasound: A Pilot Study', 'display_name': 'Diagnosis of Placental Position by Early First-Trimester Ultrasound: A Pilot Study', 'publication_year': 2019, 'publication_date': '2019-11-01', 'ids': {'openalex': 'https://openalex.org/W2916022982', 'doi': 'https://doi.org/10.1177/1933719119831778', 'mag': '2916022982', 'pmid': 'https://pubmed.ncbi.nlm.nih.gov/30791823'}, 'language': 'en', 'primary_location': {'is_oa': False, 'landing_page_url': 'https://doi.org/10.1177/1933719119831778', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S68157034', 'display_name': 'Reproductive Sciences', 'issn_l': '1933-7191', 'issn': ['1933-7191', '1933-7205'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319965', 'host_organization_name': 'Springer Nature', 'host_organization_lineage': ['https://openalex.org/P4310319965'], 'host_organization_lineage_names': ['Springer Nature'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref', 'pubmed'], 'open_access': {'is_oa': False, 'oa_status': 'closed', 'oa_url': None, 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5071461337', 'display_name': 'Laura Detti', 'orcid': 'https://orcid.org/0000-0001-6868-7185'}, 'institutions': [{'id': 'https://openalex.org/I160606119', 'display_name': 'University of Tennessee Health Science Center', 'ror': 'https://ror.org/0011qv509', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I160606119']}], 'countries': ['US'], 'is_corresponding': True, 'raw_author_name': 'Laura Detti', 'raw_affiliation_strings': ['Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA'], 'affiliations': [{'raw_affiliation_string': 'Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA', 'institution_ids': ['https://openalex.org/I160606119']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5008802893', 'display_name': 'Jennifer Gordon', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I160606119', 'display_name': 'University of Tennessee Health Science Center', 'ror': 'https://ror.org/0011qv509', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I160606119']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Jennifer C. Gordon', 'raw_affiliation_strings': ['Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA'], 'affiliations': [{'raw_affiliation_string': 'Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA', 'institution_ids': ['https://openalex.org/I160606119']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5050877828', 'display_name': 'Mary E. Christiansen', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I160606119', 'display_name': 'University of Tennessee Health Science Center', 'ror': 'https://ror.org/0011qv509', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I160606119']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Mary E. Christiansen', 'raw_affiliation_strings': ['Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA'], 'affiliations': [{'raw_affiliation_string': 'Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA', 'institution_ids': ['https://openalex.org/I160606119']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5028486456', 'display_name': 'Nicole A. Van de Velde', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I160606119', 'display_name': 'University of Tennessee Health Science Center', 'ror': 'https://ror.org/0011qv509', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I160606119']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Nicole A. Van de Velde', 'raw_affiliation_strings': ['Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA'], 'affiliations': [{'raw_affiliation_string': 'Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA', 'institution_ids': ['https://openalex.org/I160606119']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5060406568', 'display_name': 'Ludwig Francillon', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I160606119', 'display_name': 'University of Tennessee Health Science Center', 'ror': 'https://ror.org/0011qv509', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I160606119']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Ludwig Francillon', 'raw_affiliation_strings': ['Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA'], 'affiliations': [{'raw_affiliation_string': 'Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA', 'institution_ids': ['https://openalex.org/I160606119']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5063797337', 'display_name': 'Irene Peregrín-Álvarez', 'orcid': 'https://orcid.org/0000-0003-4734-0486'}, 'institutions': [{'id': 'https://openalex.org/I160606119', 'display_name': 'University of Tennessee Health Science Center', 'ror': 'https://ror.org/0011qv509', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I160606119']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Irene Peregrin-Alvarez', 'raw_affiliation_strings': ['Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA'], 'affiliations': [{'raw_affiliation_string': 'Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA', 'institution_ids': ['https://openalex.org/I160606119']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5063877510', 'display_name': 'Robert A. Roman', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I160606119', 'display_name': 'University of Tennessee Health Science Center', 'ror': 'https://ror.org/0011qv509', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I160606119']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Robert A. Roman', 'raw_affiliation_strings': ['Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA'], 'affiliations': [{'raw_affiliation_string': 'Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA', 'institution_ids': ['https://openalex.org/I160606119']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5002236469', 'display_name': 'Anna Joy Rogers', 'orcid': 'https://orcid.org/0000-0002-9907-8806'}, 'institutions': [{'id': 'https://openalex.org/I160606119', 'display_name': 'University of Tennessee Health Science Center', 'ror': 'https://ror.org/0011qv509', 'country_code': 'US', 'type': 'education', 'lineage': ['https://openalex.org/I160606119']}], 'countries': ['US'], 'is_corresponding': False, 'raw_author_name': 'Anna Joy G. Rogers', 'raw_affiliation_strings': ['Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA'], 'affiliations': [{'raw_affiliation_string': 'Division of Reproductive Endocrinology and Infertility Rout Center, Department of Obstetrics and Gynecology, University of Tennessee Health Science Center, 853 Jefferson Ave, Suite E102, Memphis, TN, 38163, USA', 'institution_ids': ['https://openalex.org/I160606119']}]}], 'countries_distinct_count': 1, 'institutions_distinct_count': 1, 'corresponding_author_ids': ['https://openalex.org/A5071461337'], 'corresponding_institution_ids': ['https://openalex.org/I160606119'], 'apc_list': {'value': 2290, 'currency': 'EUR', 'value_usd': 2890, 'provenance': 'doaj'}, 'apc_paid': None, 'fwci': 0.75, 'has_fulltext': True, 'fulltext_origin': 'ngrams', 'cited_by_count': 6, 'citation_normalized_percentile': {'value': 0.819324, 'is_in_top_1_percent': False, 'is_in_top_10_percent': False}, 'cited_by_percentile_year': {'min': 81, 'max': 83}, 'biblio': {'volume': '26', 'issue': '11', 'first_page': '1512', 'last_page': '1518'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T12096', 'display_name': 'Diagnosis and Management of Ectopic Pregnancy', 'score': 0.9999, 'subfield': {'id': 'https://openalex.org/subfields/2739', 'display_name': 'Public Health, Environmental and Occupational Health'}, 'field': {'id': 'https://openalex.org/fields/27', 'display_name': 'Medicine'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}, 'topics': [{'id': 'https://openalex.org/T12096', 'display_name': 'Diagnosis and Management of Ectopic Pregnancy', 'score': 0.9999, 'subfield': {'id': 'https://openalex.org/subfields/2739', 'display_name': 'Public Health, Environmental and Occupational Health'}, 'field': {'id': 'https://openalex.org/fields/27', 'display_name': 'Medicine'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}, {'id': 'https://openalex.org/T11732', 'display_name': 'Impact of Assisted Reproductive Technology on Perinatal Outcomes', 'score': 0.9985, 'subfield': {'id': 'https://openalex.org/subfields/2735', 'display_name': 'Pediatrics, Perinatology and Child Health'}, 'field': {'id': 'https://openalex.org/fields/27', 'display_name': 'Medicine'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}, {'id': 'https://openalex.org/T11389', 'display_name': 'Maternal Morbidity Associated with Pregnancy and Childbirth', 'score': 0.9919, 'subfield': {'id': 'https://openalex.org/subfields/2735', 'display_name': 'Pediatrics, Perinatology and Child Health'}, 'field': {'id': 'https://openalex.org/fields/27', 'display_name': 'Medicine'}, 'domain': {'id': 'https://openalex.org/domains/4', 'display_name': 'Health Sciences'}}], 'keywords': [{'id': 'https://openalex.org/keywords/prenatal-diagnosis', 'display_name': 'Prenatal Diagnosis', 'score': 0.572144}, {'id': 'https://openalex.org/keywords/early-pregnancy', 'display_name': 'Early Pregnancy', 'score': 0.532499}, {'id': 'https://openalex.org/keywords/ectopic-pregnancy', 'display_name': 'Ectopic Pregnancy', 'score': 0.518866}, {'id': 'https://openalex.org/keywords/tubal-ectopic-pregnancy', 'display_name': 'Tubal Ectopic Pregnancy', 'score': 0.518775}, {'id': 'https://openalex.org/keywords/ultrasound-diagnosis', 'display_name': 'Ultrasound Diagnosis', 'score': 0.513981}], 'concepts': [{'id': 'https://openalex.org/C2776038736', 'wikidata': 'https://www.wikidata.org/wiki/Q5553682', 'display_name': 'Gestational sac', 'level': 4, 'score': 0.7510557}, {'id': 'https://openalex.org/C131872663', 'wikidata': 'https://www.wikidata.org/wiki/Q5284418', 'display_name': 'Obstetrics', 'level': 1, 'score': 0.74841046}, {'id': 'https://openalex.org/C46973012', 'wikidata': 'https://www.wikidata.org/wiki/Q28627', 'display_name': 'Gestation', 'level': 3, 'score': 0.71182954}, {'id': 'https://openalex.org/C2779234561', 'wikidata': 'https://www.wikidata.org/wiki/Q11995', 'display_name': 'Pregnancy', 'level': 2, 'score': 0.70126057}, {'id': 'https://openalex.org/C71924100', 'wikidata': 'https://www.wikidata.org/wiki/Q11190', 'display_name': 'Medicine', 'level': 0, 'score': 0.6868822}, {'id': 'https://openalex.org/C143753070', 'wikidata': 'https://www.wikidata.org/wiki/Q162564', 'display_name': 'Ultrasound', 'level': 2, 'score': 0.58338857}, {'id': 'https://openalex.org/C2777043721', 'wikidata': 'https://www.wikidata.org/wiki/Q369887', 'display_name': 'Yolk sac', 'level': 3, 'score': 0.5564561}, {'id': 'https://openalex.org/C29456083', 'wikidata': 'https://www.wikidata.org/wiki/Q1221899', 'display_name': 'Gynecology', 'level': 1, 'score': 0.5076827}, {'id': 'https://openalex.org/C2776953305', 'wikidata': 'https://www.wikidata.org/wiki/Q1212935', 'display_name': 'Placenta', 'level': 4, 'score': 0.50395936}, {'id': 'https://openalex.org/C2778376644', 'wikidata': 'https://www.wikidata.org/wiki/Q2253111', 'display_name': 'Gestational age', 'level': 3, 'score': 0.4667661}, {'id': 'https://openalex.org/C2776018949', 'wikidata': 'https://www.wikidata.org/wiki/Q207087', 'display_name': 'Ectopic pregnancy', 'level': 3, 'score': 0.431045}, {'id': 'https://openalex.org/C172680121', 'wikidata': 'https://www.wikidata.org/wiki/Q26513', 'display_name': 'Fetus', 'level': 3, 'score': 0.29643127}, {'id': 'https://openalex.org/C196843134', 'wikidata': 'https://www.wikidata.org/wiki/Q33196', 'display_name': 'Embryo', 'level': 2, 'score': 0.19892642}, {'id': 'https://openalex.org/C126838900', 'wikidata': 'https://www.wikidata.org/wiki/Q77604', 'display_name': 'Radiology', 'level': 1, 'score': 0.16914287}, {'id': 'https://openalex.org/C86803240', 'wikidata': 'https://www.wikidata.org/wiki/Q420', 'display_name': 'Biology', 'level': 0, 'score': 0.11810589}, {'id': 'https://openalex.org/C54355233', 'wikidata': 'https://www.wikidata.org/wiki/Q7162', 'display_name': 'Genetics', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C95444343', 'wikidata': 'https://www.wikidata.org/wiki/Q7141', 'display_name': 'Cell biology', 'level': 1, 'score': 0.0}], 'mesh': [{'descriptor_ui': 'D010920', 'descriptor_name': 'Placenta', 'qualifier_ui': 'Q000502', 'qualifier_name': 'physiology', 'is_major_topic': True}, {'descriptor_ui': 'D010920', 'descriptor_name': 'Placenta', 'qualifier_ui': 'Q000000981', 'qualifier_name': 'diagnostic imaging', 'is_major_topic': True}, {'descriptor_ui': 'D011261', 'descriptor_name': 'Pregnancy Trimester, First', 'qualifier_ui': 'Q000502', 'qualifier_name': 'physiology', 'is_major_topic': True}, {'descriptor_ui': 'D016216', 'descriptor_name': 'Ultrasonography, Prenatal', 'qualifier_ui': 'Q000379', 'qualifier_name': 'methods', 'is_major_topic': True}, {'descriptor_ui': 'D000328', 'descriptor_name': 'Adult', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D005260', 'descriptor_name': 'Female', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D006801', 'descriptor_name': 'Humans', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D010865', 'descriptor_name': 'Pilot Projects', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D010920', 'descriptor_name': 'Placenta', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D011247', 'descriptor_name': 'Pregnancy', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D011261', 'descriptor_name': 'Pregnancy Trimester, First', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D011272', 'descriptor_name': 'Pregnancy, Multiple', 'qualifier_ui': 'Q000502', 'qualifier_name': 'physiology', 'is_major_topic': False}, {'descriptor_ui': 'D011272', 'descriptor_name': 'Pregnancy, Multiple', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D011446', 'descriptor_name': 'Prospective Studies', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D012189', 'descriptor_name': 'Retrospective Studies', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}, {'descriptor_ui': 'D016216', 'descriptor_name': 'Ultrasonography, Prenatal', 'qualifier_ui': '', 'qualifier_name': None, 'is_major_topic': False}], 'locations_count': 2, 'locations': [{'is_oa': False, 'landing_page_url': 'https://doi.org/10.1177/1933719119831778', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S68157034', 'display_name': 'Reproductive Sciences', 'issn_l': '1933-7191', 'issn': ['1933-7191', '1933-7205'], 'is_oa': False, 'is_in_doaj': False, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319965', 'host_organization_name': 'Springer Nature', 'host_organization_lineage': ['https://openalex.org/P4310319965'], 'host_organization_lineage_names': ['Springer Nature'], 'type': 'journal'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}, {'is_oa': False, 'landing_page_url': 'https://pubmed.ncbi.nlm.nih.gov/30791823', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306525036', 'display_name': 'PubMed', 'issn_l': None, 'issn': None, 'is_oa': False, 'is_in_doaj': False, 'is_core': False, 'host_organization': 'https://openalex.org/I1299303238', 'host_organization_name': 'National Institutes of Health', 'host_organization_lineage': ['https://openalex.org/I1299303238'], 'host_organization_lineage_names': ['National Institutes of Health'], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': None, 'sustainable_development_goals': [{'score': 0.77, 'display_name': 'Zero hunger', 'id': 'https://metadata.un.org/sdg/2'}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 19, 'referenced_works': ['https://openalex.org/W1650118674', 'https://openalex.org/W1987766935', 'https://openalex.org/W1992918573', 'https://openalex.org/W2041940908', 'https://openalex.org/W2067425526', 'https://openalex.org/W2110775865', 'https://openalex.org/W2120978257', 'https://openalex.org/W2122071962', 'https://openalex.org/W2125359974', 'https://openalex.org/W2137377270', 'https://openalex.org/W2153684870', 'https://openalex.org/W2213022375', 'https://openalex.org/W2287548067', 'https://openalex.org/W3146879134', 'https://openalex.org/W4232335954', 'https://openalex.org/W4238199701', 'https://openalex.org/W4239820138', 'https://openalex.org/W4317999673', 'https://openalex.org/W658876708'], 'related_works': ['https://openalex.org/W4323362705', 'https://openalex.org/W2981142573', 'https://openalex.org/W2390618901', 'https://openalex.org/W2333891256', 'https://openalex.org/W2255222727', 'https://openalex.org/W2106472611', 'https://openalex.org/W2097044321', 'https://openalex.org/W2068200039', 'https://openalex.org/W2063173918', 'https://openalex.org/W2052494798'], 'abstract_inverted_index': None, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W2916022982', 'counts_by_year': [{'year': 2024, 'cited_by_count': 1}, {'year': 2023, 'cited_by_count': 2}, {'year': 2021, 'cited_by_count': 1}, {'year': 2020, 'cited_by_count': 2}], 'updated_date': '2024-09-13T14:17:06.276010', 'created_date': '2019-03-02'}