Chromosomes and Pregnancy (image) Rutgers University Share Print E-Mail Caption Chromosomes in an egg. Modeling can help predict how many eggs should be retrieved for in vitro fertilization to lead to a normal, successful pregnancy. Credit Cecilia Blengini and Kristen Driscoll Usage Restrictions None 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.