Refine My Results

Creation Date 

1. Before 1957  (1,203)
2. 1957 To 1973  (5,661)
3. 1974 To 1990  (24,153)
4. 1991 To 2008  (90,090)
5. After 2008  (187,681)
6. More options 

New Records 

1. New From Last Week  (25)
2. New From Last Month  (748)
3. New From Last 3 Month  (3,496)
4. More options 

Resource Type 

1. Articles  (221,314)
2. Newspaper Articles  (26,969)
3. Newsletter Articles  (21,975)
4. Book Chapters  (12,675)
5. magazinearticle  (8,260)
6. Thesises (postgraduate)  (3,544)
7. Reviews  (2,602)
8. Reports  (2,384)
9. Patents  (1,700)
10. Web Resources  (1,600)
11. References  (1,172)
12. Conference Proceedings  (945)
13. Text Resources  (774)
14. Books  (637)
15. Videos  (32)
16. Images  (30)
17. Datasets  (11)
18. Audio  (8)
19. Standards  (7)
20. Government Documents  (6)
21. More options 

Subject 

1. Science & Technology  (152,556)
2. Life Sciences & Biomedicine  (142,264)
3. Pregnancy  (115,070)
4. Female  (106,780)
5. Humans  (104,284)
6. Fetuses  (73,306)
7. Animals  (55,937)
8. Biological And Medical Sciences  (35,157)
9. Male  (35,095)
10. Obstetrics & Gynecology  (31,147)
11. Adult  (30,693)
12. Infant, Newborn  (27,458)
13. Medical Sciences  (25,590)
14. Gestational Age  (24,706)
15. Abortion  (22,149)
16. Womens Health  (20,738)
17. Pediatrics  (17,368)
18. Fetus  (17,126)
19. Mice  (15,605)
20. Rats  (14,117)
21. More options 

Databases 

1. ProQuest Central  (173,791)
2. MEDLINE  (143,664)
3. PubMed Central  (57,485)
4. Geneva Foundation Free Medical Journals  (56,483)
5. DOAJ Directory of Open Access Journals  (50,833)
6. ROAD: Directory of Open Access Scholarly Resources  (40,918)
7. HighWire Press (Free Journals)  (18,450)
8. Wiley Online Library Open Access  (15,795)
9. ProQuest One Psychology  (12,274)
10. Springer Nature OA Free Journals  (11,130)
11. Nature (Open access)  (6,624)
12. Public Library of Science (PLoS) Journals Open Access  (5,567)
13. Taylor & Francis Open Access  (4,577)
14. Ebook Central - Academic Complete  (3,437)
15. Journals@Ovid Open Access Journal Collection Rolling  (2,795)
16. IngentaConnect  (2,664)
17. JSTOR Early Journal Content Free  (2,400)
18. Coronavirus Research Database  (2,227)
19. Free E- Journals  (2,113)
20. US Government Documents  (1,705)
21. More options 

Language 

1. English  (291,829)
2. Japanese  (25,228)
3. German  (5,386)
4. French  (3,675)
5. Spanish  (2,653)
6. Portuguese  (1,549)
7. Chinese  (1,152)
8. Russian  (1,102)
9. Korean  (665)
10. Polish  (523)
11. Turkish  (336)
12. Italian  (188)
13. Norwegian  (153)
14. Swedish  (152)
15. Dutch  (150)
16. Croatian  (121)
17. Persian  (120)
18. Bulgarian  (106)
19. Catalan  (103)
20. Czech  (101)
21. More options 

Journal Title 

1. American Journal Of Obstetrics And Gynecology  (3,027)
2. Incidence And Prevalence Data  (1,935)
3. New York Times  (2,788)
4. Plos One  (4,779)
5. Prenatal Diagnosis  (3,540)
6. The Journal Of Maternal-Fetal & Neonatal Medicine  (2,081)
7. The Lancet  (2,142)
8. The New York Times  (2,616)
9. The Washington Post  (2,885)
10. Ultrasound In Obstetrics & Gynecology  (3,483)
11. More options