Parasitic Worms Affect Human Reproduction (3 of 3) (image) American Association for the Advancement of Science Share Print E-Mail Caption A Tsimane extended family. This material relates to a paper that appeared in the Nov. 20, 2015, issue of Science, published by AAAS. The paper, by Aaron D. Blackwell at University of California, Santa Barbara in Santa Barbara, Calif., and colleagues was titled, 'Helminth infection, fecundity, and age of first pregnancy in women.' Credit Michael Gurven Usage Restrictions Please cite the owner of the material when publishing. This material may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.