James N. Macri

3.3k total citations · 1 hit paper
67 papers, 2.3k citations indexed

About

James N. Macri is a scholar working on Pediatrics, Perinatology and Child Health, Surgery and Infectious Diseases. According to data from OpenAlex, James N. Macri has authored 67 papers receiving a total of 2.3k indexed citations (citations by other indexed papers that have themselves been cited), including 55 papers in Pediatrics, Perinatology and Child Health, 17 papers in Surgery and 15 papers in Infectious Diseases. Recurrent topics in James N. Macri's work include Prenatal Screening and Diagnostics (47 papers), Congenital Anomalies and Fetal Surgery (15 papers) and Parvovirus B19 Infection Studies (15 papers). James N. Macri is often cited by papers focused on Prenatal Screening and Diagnostics (47 papers), Congenital Anomalies and Fetal Surgery (15 papers) and Parvovirus B19 Infection Studies (15 papers). James N. Macri collaborates with scholars based in United States, United Kingdom and Italy. James N. Macri's co-authors include Harold M. Nitowsky, Walter Johnson, Irwin R. Merkatz, David Krantz, Kevin Spencer, Philip D. Buchanan, John W. Larsen, David A. Aitken, Jennifer A. Crossley and J. M. Connor and has published in prestigious journals such as New England Journal of Medicine, The Lancet and JAMA.

In The Last Decade

James N. Macri

66 papers receiving 2.1k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

An association between low maternal serum α-fetoprotein and fetal chromosomal abnormalities

1984 531 citations James N. Macri et al. American Journal of Obstetrics and Gynecology profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
James N. Macri United States	25	2.0k	824	495	459	362	67	2.3k
Ron Maymon Israel	22	1.5k 0.7×	391 0.5×	212 0.4×	572 1.2×	413 1.1×	106	1.8k
Chanane Wanapirak Thailand	22	1.3k 0.6×	458 0.6×	273 0.6×	440 1.0×	216 0.6×	122	2.0k
Pranav Pandya United Kingdom	20	1.2k 0.6×	444 0.5×	561 1.1×	312 0.7×	301 0.8×	75	1.5k
Devereux N. Saller United States	19	1.1k 0.5×	373 0.5×	193 0.4×	200 0.4×	198 0.5×	51	1.4k
Jiri Sonek United States	29	1.7k 0.9×	613 0.7×	616 1.2×	661 1.4×	383 1.1×	99	2.4k
K Philipp Austria	24	1.1k 0.5×	213 0.3×	301 0.6×	778 1.7×	208 0.6×	64	1.6k
M. M. Gil Spain	24	2.7k 1.3×	1.1k 1.3×	337 0.7×	794 1.7×	452 1.2×	80	3.1k
E. Hafner Austria	28	1.2k 0.6×	261 0.3×	359 0.7×	880 1.9×	211 0.6×	62	1.8k
Allan T. Bombard United States	20	2.5k 1.3×	1.0k 1.2×	305 0.6×	210 0.5×	156 0.4×	62	2.8k
Markus Hoopmann Germany	22	857 0.4×	265 0.3×	309 0.6×	421 0.9×	280 0.8×	145	1.6k

Countries citing papers authored by James N. Macri

Since Specialization

Citations

This map shows the geographic impact of James N. Macri's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by James N. Macri with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites James N. Macri more than expected).

Fields of papers citing papers by James N. Macri

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by James N. Macri. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by James N. Macri. The network helps show where James N. Macri may publish in the future.

Co-authorship network of co-authors of James N. Macri

This figure shows the co-authorship network connecting the top 25 collaborators of James N. Macri. A scholar is included among the top collaborators of James N. Macri based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with James N. Macri. James N. Macri is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Krantz, David, et al.. (2007). Genetic sonography after first‐trimester Down syndrome screening. Ultrasound in Obstetrics and Gynecology. 29(6). 666–670. 30 indexed citations

Krantz, David, et al.. (2005). Maternal weight and ethnic adjustment within a first-trimester Down syndrome and trisomy 18 screening program. Prenatal Diagnosis. 25(8). 635–640. 36 indexed citations

Buchanan, Philip D., et al.. (2003). Combined first-trimester versus second-trimester serum screening for Down syndrome: A cost analysis. American Journal of Obstetrics and Gynecology. 188(3). 745–751. 17 indexed citations

Hallahan, Terrence, David Krantz, F. Orlandi, et al.. (2000). First trimester biochemical screening for Down syndrome: free beta hCG versus intact hCG. Prenatal Diagnosis. 20(10). 785–789. 20 indexed citations

Orlandi, F., et al.. (1997). First‐trimester screening for fetal aneuploidy: biochemistry and nuchal translucency. Ultrasound in Obstetrics and Gynecology. 10(6). 381–386. 97 indexed citations

Aitken, David A., Euan M. Wallace, Jennifer A. Crossley, et al.. (1996). Dimeric Inhibin A as a Marker for Down's Syndrome in Early Pregnancy. New England Journal of Medicine. 334(19). 1231–1236. 140 indexed citations

Spencer, Kevin, D.A. Aitken, James N. Macri, & Philip D. Buchanan. (1996). URINE FREE BETA hCG AND BETA CORE IN PREGNANCIES AFFECTED BY DOWN'S SYNDROME. Prenatal Diagnosis. 16(7). 605–613. 33 indexed citations

Spencer, Kevin, D.A. Aitken, Jennifer A. Crossley, et al.. (1994). First Trimester Biochemical Screening for Trisomy 21: The Role of Free Beta hCG, Alpha Fetoprotein and Pregnancy Associated Plasma Protein A. Annals of Clinical Biochemistry International Journal of Laboratory Medicine. 31(5). 447–454. 58 indexed citations

Macri, James N., Kenneth L. Garver, Philip D. Buchanan, et al.. (1994). Maternal serum free beta hCG screening: Results of studies including 480 cases of down syndrome. Prenatal Diagnosis. 14(2). 97–103. 47 indexed citations

10.

Spencer, Kevin, et al.. (1993). Prenatal screening for trisomy 18 with free beta human chorionic gonadotrophin as a marker.. BMJ. 307(6917). 1455–1458. 37 indexed citations

11.

Macri, James N., Kevin Spencer, David A. Aitken, et al.. (1993). First‐trimester free beta (hCG) screening for Down syndrome. Prenatal Diagnosis. 13(7). 557–562. 69 indexed citations

12.

Spencer, Kevin, James N. Macri, Ronald Anderson, et al.. (1993). Dual Analyte Immunoassay in Neural Tube Defect and Down's Syndrome Screening: Results of a Multicentre Clinical Trial. Annals of Clinical Biochemistry International Journal of Laboratory Medicine. 30(4). 394–401. 25 indexed citations

13.

Aitken, David A., Jennifer A. Crossley, Esther Berry, et al.. (1993). First‐trimester biochemical screening for fetal chromosome abnormalities and neural tube defects. Prenatal Diagnosis. 13(8). 681–689. 59 indexed citations

14.

Macri, James N., et al.. (1993). Free β-Chorionic Gonadotropin: A Cross-Reactivity Study of Two Immunometric Assays Used in Prenatal Maternal Serum Screening for Down's Syndrome. Annals of Clinical Biochemistry International Journal of Laboratory Medicine. 30(1). 94–98. 24 indexed citations

15.

Macri, James N., et al.. (1990). Maternal serum Down syndrome screening: Free β-protein is a more effective marker than human chorionic gonadotropin. American Journal of Obstetrics and Gynecology. 163(4). 1248–1253. 158 indexed citations

16.

Macri, James N., et al.. (1987). Maternal serum α-fetoprotein screening. American Journal of Obstetrics and Gynecology. 157(4). 820–822. 14 indexed citations

17.

Macri, James N., et al.. (1983). The clinical significance of low maternal serum α-fetoprotein. American Journal of Obstetrics and Gynecology. 146(6). 657–661. 24 indexed citations

18.

Macri, James N., James E. Haddow, & Robert R. Weiss. (1979). Screening for neural tube defects in the United States. DigitalGeorgetown (Georgetown University Library). 13 indexed citations

19.

Weiss, Robert R., et al.. (1976). Origin of amniotic fluid alpha-fetoprotein in normal and defective pregnancies.. Munich Personal RePEc Archive (Ludwig Maximilian University of Munich). 47(6). 697–700. 22 indexed citations

20.

Milunsky, Aubrey, et al.. (1975). Prenatal detection of neural tube defects. American Journal of Obstetrics and Gynecology. 122(3). 313–315. 26 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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