articles+ search results

107,246 articles+ results

View results as:
Number of results to display per page
hide topic overview

Childbirth.

In humans, pregnancy lasts an average of forty weeks, counting from the first day of the woman’s last menstrual cycle. In fact, ovulation, and therefore conception and the start of pregnancy, does not normally occur until about two weeks after the...

Salem Press Encyclopedia of Science, 2019. 6p.

Catalog

Books, media, physical & digital resources

Guides

Course- and topic-based guides to collections, tools, and services.