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Usage Information

As the world grows: contraception in the 21st century
R. John Aitken, Mark A. Baker, Gustavo F. Doncel, Martin M. Matzuk, Christine K. Mauck, Michael J.K. Harper
R. John Aitken, Mark A. Baker, Gustavo F. Doncel, Martin M. Matzuk, Christine K. Mauck, Michael J.K. Harper
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Review Series

As the world grows: contraception in the 21st century

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Abstract

Contraceptives that are readily available and acceptable are required in many poorer countries to reduce population growth and in all countries to prevent maternal morbidity and mortality arising from unintended pregnancies. Most available methods use hormonal steroids or are variations of barrier methods. Reports from several fora over the last 12 years have emphasized the number of unwanted pregnancies and resultant abortions, which indicate an unmet need for safe, acceptable, and inexpensive contraceptive methods. This unmet need can be assuaged, in part, by development of new nonhormonal contraceptive methods. This Review addresses the contribution that the “omic” revolution can make to the identification of novel contraceptive targets, as well as the progress that has been made for different target molecules under development.

Authors

R. John Aitken, Mark A. Baker, Gustavo F. Doncel, Martin M. Matzuk, Christine K. Mauck, Michael J.K. Harper

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Usage data is cumulative from July 2025 through July 2026.

Usage JCI PMC
Text version 1,712 103
PDF 245 17
Figure 237 0
Table 392 0
Citation downloads 200 0
Totals 2,786 120
Total Views 2,906
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Usage information is collected from two different sources: this site (JCI) and Pubmed Central (PMC). JCI information (compiled daily) shows human readership based on methods we employ to screen out robotic usage. PMC information (aggregated monthly) is also similarly screened of robotic usage.

Various methods are used to distinguish robotic usage. For example, Google automatically scans articles to add to its search index and identifies itself as robotic; other services might not clearly identify themselves as robotic, or they are new or unknown as robotic. Because this activity can be misinterpreted as human readership, data may be re-processed periodically to reflect an improved understanding of robotic activity. Because of these factors, readers should consider usage information illustrative but subject to change.

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ISSN: 0021-9738 (print), 1558-8238 (online)

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