Does length of labor vary by maternal age?

Births: preliminary data for 2012.

Brady E Hamilton, Joyce A Martin, Stephanie J. Ventura · PubMed · 2013 · 1.4K citations

Population Science, Fertility, Teenage Pregnancy +19

Impact of Maternal Age on Obstetric Outcome

Jane Cleary‐Goldman, Fergal D. Malone, John Vidaver et al. · Obstetrics and Gynecology · 2005 · 845 citations

Advanced Maternal Age and Adverse Perinatal Outcome

Bo Jacobsson, Lars Ladfors, Ian Milsom · Obstetrics and Gynecology · 2004 · 700 citations

Primigravid Labor

Emanuel A. Friedman · Obstetrics and Gynecology · 1955 · 526 citations

Reproductive Sciences, Family Medicine, Reproductive Health +21

The graphic analysis of labor

Emanuel A. Friedman · American Journal of Obstetrics and Gynecology · 1954 · 482 citations

Economics, Labour Study, Workforce Development +7